Patient navigation to promote smoking cessation among low-income primary care patients: a pilot randomized controlled trial
We conducted a pilot randomized controlled trial to determine the feasibility and acceptability of a patient navigation intervention. Forty-seven smokers from one safety-net hospital were randomized to either a control group, in which they received a smoking cessation brochure and a list of smoking cessation resources, or a navigation group, in which they received the smoking cessation brochure, a list of smoking cessation resources, and patient navigation. Follow-up data were obtained for 33 participants. Nine (47.4%) of 19 of navigation group participants had engaged in smoking cessation treatment by 3 months versus 6 (42.9%) of 14 control group participants (chi-square p = ns). Patient navigation to promote engagement in smoking cessation treatment was feasible and acceptable to participants.
We examined the feasibility of using a remotely manoeuverable robot to make home hazard assessments for fall prevention. We employed use-case simulations to compare robot assessments with in-person assessments. We screened the homes of nine elderly patients (aged 65 years or more) for fall risks using the HEROS screening assessment. We also assessed the participants' perspectives of the remotely-operated robot in a survey. The nine patients had a median Short Blessed Test score of 8 (interquartile range, IQR 2-20) and a median Life-Space Assessment score of 46 (IQR 27-75). Compared to the in-person assessment (mean = 4.2 hazards identified per participant), significantly more home hazards were perceived in the robot video assessment (mean = 7.0). Only two checklist items (adequate bedroom lighting and a clear path from bed to bathroom) had more than 60% agreement between in-person and robot video assessment. Participants were enthusiastic about the robot and did not think it violated their privacy. The study found little agreement between the in-person and robot video hazard assessments. However, it identified several research questions about how to best use remotely-operated robots.
IMPORTANCE: Fiscal food policies (eg, taxation) are increasingly proposed to improve population-level health, but their impact on health disparities is unknown.
OBJECTIVE: To estimate subgroup-specific effects of fast food price changes on fast food consumption and cardiometabolic outcomes.
DESIGN, SETTING, AND PARTICIPANTS: Twenty-year follow-up (5 examinations) in a biracial US prospective cohort: Coronary Artery Risk Development in Young Adults (CARDIA) (1985/1986-2005/2006, baseline N = 5115). Participants were aged 18 to 30 years at baseline; design indicated equal recruitment by race (black vs white), educational attainment, age, and sex. Community-level price data from the Council for Community and Economic Research were temporally and geographically linked to study participants' home address at each examination.
MAIN OUTCOMES AND MEASURES: Participant-reported number of fast food eating occasions per week, body mass index (BMI), and homeostasis model assessment insulin resistance (HOMA-IR) from fasting glucose and insulin concentrations. Covariates included individual-level and community-level social and demographic factors.
RESULTS: In repeated measures regression analysis, multivariable-adjusted associations between fast food price and consumption were nonlinear (quadratic, P < .001), with significant inverse estimated effects on consumption at higher prices; estimates varied according to race (interaction P = .04), income (P = .07), and education (P = .03). At the 10th percentile of price ($1.25/serving), blacks and whites had mean fast food consumption frequency of 2.20 (95% CI, 2.07-2.33) and 1.55 (1.45-1.65) times/wk, respectively, whereas at the 90th percentile of price ($1.53/serving), respective mean consumption estimates were 1.86 (1.75-1.97) and 1.50 (1.41-1.59) times/wk. We observed differential price effects on HOMA-IR (inverse for lower educational status only [interaction P = .005] and at middle income only [interaction P = .02]) and BMI (inverse for blacks, less education, and middle income; positive for whites, more education, and high income [all interaction P < .001]).
CONCLUSIONS AND RELEVANCE: We found greater fast food price sensitivity on fast food consumption and insulin resistance among sociodemographic groups that have a disproportionate burden of chronic disease. Our findings have implications for fiscal policy, particularly with respect to possible effects of fast food taxes among populations with diet-related health disparities.
Recommendations for a culturally relevant Internet-based tool to promote physical activity among overweight young African American women, Alabama, 2010-2011
INTRODUCTION: Innovative approaches are needed to promote physical activity among young adult overweight and obese African American women. We sought to describe key elements that African American women desire in a culturally relevant Internet-based tool to promote physical activity among overweight and obese young adult African American women.
METHODS: A mixed-method approach combining nominal group technique and traditional focus groups was used to elicit recommendations for the development of an Internet-based physical activity promotion tool. Participants, ages 19 to 30 years, were enrolled in a major university. Nominal group technique sessions were conducted to identify themes viewed as key features for inclusion in a culturally relevant Internet-based tool. Confirmatory focus groups were conducted to verify and elicit more in-depth information on the themes.
RESULTS: Twenty-nine women participated in nominal group (n = 13) and traditional focus group sessions (n = 16). Features that emerged to be included in a culturally relevant Internet-based physical activity promotion tool were personalized website pages, diverse body images on websites and in videos, motivational stories about physical activity and women similar to themselves in size and body shape, tips on hair care maintenance during physical activity, and online social support through social media (eg, Facebook, Twitter).
CONCLUSION: Incorporating existing social media tools and motivational stories from young adult African American women in Internet-based tools may increase the feasibility, acceptability, and success of Internet-based physical activity programs in this high-risk, understudied population.
Smoking-cessation e-referrals: a national dental practice-based research network randomized controlled trial
BACKGROUND: Tobacco use is still the leading preventable cause of death and morbidity in the U.S. Web-assisted tobacco interventions are an effective but underutilized tool in assisting smokers with quitting. The dental visit is an excellent opportunity to assist smokers in quitting by referring them to these tobacco-cessation online programs.
PURPOSE: The study purpose was to test two patient referral methods-paper referrals (information prescriptions) versus paper plus e-referrals-to a web-assisted smoking-cessation induction system.
DESIGN: RCT that used implementation research methods.
PARTICIPANTS/SETTING: A total of 100 community-based dental practices were enrolled and 1814 smokers were referred to the web-assisted tobacco induction system.
INTERVENTION: The study intervention was a proactive e-referral of smokers to a web-assisted tobacco induction system called Decide2Quit.org, and the control group used paper referrals (information prescriptions) to refer smokers to the Decide2Quit.org.
MAIN OUTCOME MEASUREMENTS: The outcome measurements were the referral numbers, Decide2Quit registration numbers, and the smokers' quit rate. Data were collected in 2010-2011 and analyses were completed in 2012. RESULTS: Although total referrals from intervention practices was lower than control, subsequent proportions of registrations among smokers referred to Decide2Quit.org were nearly fourfold higher (adjusted mean percentages: 29.5% vs 7.6%, p < 0.01) in intervention compared with control practices. Subsequent rates of cessation among referred smokers were threefold higher (adjusted mean percentages: 3.0% vs 0.8%, p=0.03) in intervention practices as compared with control.
CONCLUSIONS: Intervention practices using the e-referral system had higher smoker registration numbers and higher quit smoking rates than the control practices. This study finds that e-referrals are effective in getting smokers to the web-assisted smoking-cessation induction system and in assisting with quitting that more than compensates for any additional effort that e-referrals require on the part of the practitioner.
CLINICAL TRIAL REGISTRATION: DPBRN Hygienists Internet Quality Improvement in Tobacco Cessation (HiQuit); NCT01108432. Preventive Medicine All rights reserved.
BACKGROUND: Patients with mental health conditions (MHCs) experience poor anticoagulation control when using warfarin, but we have limited knowledge of the association between specific mental illness and warfarin treatment outcomes.
OBJECTIVE: To examine the relationship between the severity of MHCs and outcomes of anticoagulation therapy.
DESIGN: Retrospective cohort analysis.
PARTICIPANTS: We studied 103,897 patients on warfarin for 6 or more months cared for by the Veterans Health Administration during fiscal years 2007-2008. We identified 28,216 patients with MHCs using ICD-9 codes: anxiety disorders, bipolar disorder, depression, post-traumatic stress disorder, schizophrenia, and other psychotic disorders.
MAIN MEASURES: Outcomes included anticoagulation control, as measured by percent time in the therapeutic range (TTR), as well as major hemorrhage. Predictors included different categories of MHC, Global Assessment of Functioning (GAF) scores, and psychiatric hospitalizations.
KEY RESULTS: Patients with bipolar disorder, depression, and other psychotic disorders experienced TTR decreases of 2.63 %, 2.26 %, and 2.92 %, respectively (p < 0.001), after controlling for covariates. Patients with psychotic disorders other than schizophrenia experienced increased hemorrhage after controlling for covariates [hazard ratio (HR) 1.24, p = 0.03]. Having any MHC was associated with a slightly increased hazard for hemorrhage (HR 1.19, p < 0.001) after controlling for covariates.
CONCLUSION: Patients with specific MHCs (bipolar disorder, depression, and other psychotic disorders) experienced slightly worse anticoagulation control. Patients with any MHC had a slightly increased hazard for major hemorrhage, but the magnitude of this difference is unlikely to be clinically significant. Overall, our results suggest that appropriately selected patients with MHCs can safely receive therapy with warfarin.
The goal of computer tailored health communications (CTHC) is to promote healthy behaviors by sending messages tailored to individual patients. Current CTHC systems collect baseline patient "profiles" and then use expert-written, rule-based systems to target messages to subsets of patients. Our main interest in this work is the study of collaborative filtering-based CTHC systems that can learn to tailor future message selections to individual patients based explicit feedback about past message selections. This paper reports the results of a study designed to collect explicit feedback (ratings) regarding four aspects of messages from 100 subjects in the smoking cessation support domain. Our results show that most users have positive opinions of most messages and that the ratings for all four aspects of the messages are highly correlated with each other. Finally, we conduct a range of rating prediction experiments comparing several different model variations. Our results show that predicting future ratings based on each user's past ratings contributes the most to predictive accuracy.
BACKGROUND AND OBJECTIVES: Little is known about the impact of hospitalists on family medicine residencies. We surveyed family medicine residency directors to assess attitudes about hospitalists and their involvement in residency teaching.
METHODS: Questions were included in the 2012 Council of Academic Family Medicine Educational Research Alliance (CERA) survey of family medicine residency directors. Univariate statistics were used to describe programs, directors, and our questions on the use of hospitalists. Bivariate statistics were used to examine relationships between the use of hospitalists to teach and program characteristics.
RESULTS: Forty-one percent (n=175) of residency directors completed the hospitalist section of the CERA survey. Sixty-six percent of residency programs were community based/university affiliated. The majority of directors who have, or are planning to develop, a hospitalist service currently use an internal medicine service (92.5%), followed by family medicine (39.1%), pediatrics (35.4%), OB/laborists (18.0%), and combined services (8.7%). The majority of programs with a hospitalist training track (or plans to develop one) indicated that this was for a family medicine service. Sixty percent of programs that have a hospitalist service involve hospitalists in teaching. Twenty percent of directors reported that hospitalists serve as family medicine faculty, and 63% viewed them as "good educators." However, 85% reported no reduction in inpatient teaching by family medicine faculty despite using hospitalist teaching services.
CONCLUSIONS: Hospitalists have a significant educational role in family medicine resident training. Further research is needed to explore how hospitalists and family medicine faculty can collaborate to promote enhanced efficiency and effectiveness as residency teachers.
OBJECTIVE: To identify subgroups of adults with respect to weight loss motivations and assess factors associated with subgroup membership.
METHOD: A cross-sectional survey among 414 overweight/ obese employees in 12 Massachusetts high schools was conducted. Latent class analysis (LCA) defined distinct weight loss motivation classes. Multinomial logistic regression assessed participant characteristics with class membership.
RESULTS: Three classes emerged: improving health; improving health and looking/feeling better; and improving health, looking/feeling, better and improving personal/social life. Compared to class 1, class 2 was more likely to be female and younger and class 3 was more likely to be female, younger, have children at home, and perceive themselves as very over-weight.
CONCLUSIONS: Findings can inform targeted weight loss interventions.
Explaining racial disparities in anticoagulation control: results from a study of patients at the Veterans Administration
Higher rates of stroke, major hemorrhage, and death among black patients receiving warfarin, compared with white patients, is likely related to poorer anticoagulation control. The research team investigated patient-level and site-level factors that might account for this group difference. A summary measure of anticoagulation control (percent time in therapeutic range [TTR]), patient characteristics, and site-level process of care measures were obtained for 9572 black and 88 481 white patients at the Veterans Health Administration. The research team studied disparity in TTR adjusting for patient and site characteristics. Mean unadjusted TTR for black patients was 6.5% lower than for white patients (P < .001). After accounting for the younger age of blacks, greater degrees of medication use, hospitalization, poverty, living in the South, and 11 other patient characteristics, only 2.0% of this racial disparity persisted. Process of care measures had minimal additional effect. These findings may inform efforts to reduce this racial disparity in achieving good anticoagulation control.
The Society of Behavioral Medicine (SBM), an interdisciplinary professional organization focused on the science of health behavior joins the American Academy of Dermatology, the American Academy of Pediatrics, and a host of other national and international organizations in support of a total ban on indoor tanning for minors under the age of 18. According to the International Agency for Research on Cancer, artificial sources of ultraviolet radiation are in the highest category of carcinogens, joining tobacco and asbestos. Strong evidence links indoor tanning to increased risk for melanoma with repeated exposure during childhood being associated with the greatest increase in risk. Several countries and five US states have passed legislation banning indoor tanning in minors. We strongly encourage the remaining US states to do the same in an effort to protect children and prevent new cases of melanoma. SBM also strongly encourages research that explores the use of tanning beds in the home. Home-based indoor tanning has the potential to be especially dangerous given the complete absence of safety regulations. Children are currently protected from exposure to health-harming substances like tobacco and lead; thus, legislation protecting them from artificial sources of ultraviolet radiation is yet another important step forward in improving public health.
Who benefits from diabetes self-management interventions? The influence of depression in the Latinos en Control trial
BACKGROUND: Depressive symptoms are common among adults with diabetes. Depression and social support may influence diabetes self-management.
PURPOSE: This study aimed to examine change in depressive symptoms and the role of depression and support on clinical and dietary outcomes among Latinos with type 2 diabetes participating in a diabetes self-management intervention.
METHODS: Participants (N = 252) were randomized to the intervention or usual care. Mixed effects models were used to examine interaction effects between intervention status and depressive symptoms (Centers for Epidemiologic Studies Depression (CES-D) score) and support for diabetes self-management behaviors at baseline. Outcomes were measured at baseline and 4 and 12 months and included dietary quality, physical activity, depressive symptoms, and hemoglobin A1c levels.
RESULTS: Intervention participants had lower CES-D scores at follow-up than control participants. An interaction effect between intervention status and CES-D scores predicted diet quality.
CONCLUSION: Latinos with depressive symptoms may derive the greatest benefits from diabetes self-management interventions. Additional research on support during diabetes self-management interventions is warranted.
The PROMIS Physical Function item bank was calibrated to a standardized metric and shown to improve measurement efficiency
OBJECTIVE: To document the development and psychometric evaluation of the Patient-Reported Outcomes Measurement Information System (PROMIS) Physical Function (PF) item bank and static instruments.
STUDY DESIGN AND SETTING: The items were evaluated using qualitative and quantitative methods. A total of 16,065 adults answered item subsets (n > 2,200/item) on the Internet, with oversampling of the chronically ill. Classical test and item response theory methods were used to evaluate 149 PROMIS PF items plus 10 Short Form-36 and 20 Health Assessment Questionnaire-Disability Index items. A graded response model was used to estimate item parameters, which were normed to a mean of 50 (standard deviation [SD]=10) in a US general population sample.
RESULTS: The final bank consists of 124 PROMIS items covering upper, central, and lower extremity functions and instrumental activities of daily living. In simulations, a 10-item computerized adaptive test (CAT) eliminated floor and decreased ceiling effects, achieving higher measurement precision than any comparable length static tool across four SDs of the measurement range. Improved psychometric properties were transferred to the CAT's superior ability to identify differences between age and disease groups.
CONCLUSION: The item bank provides a common metric and can improve the measurement of PF by facilitating the standardization of patient-reported outcome measures and implementation of CATs for more efficient PF assessments over a larger range.
Patient-reported functional health and well-being outcomes with drug therapy: a systematic review of randomized trials using the SF-36 health survey
OBJECTIVES: To evaluate the responsiveness of the SF-36 Health Survey in drug trials and to determine how often clinically efficacious treatments produce meaningful functional health changes across medical conditions.
RESEARCH DESIGN: We conducted a systematic review of randomized, double-blind, placebo-controlled drug trials published from 1995 to 2011 that documented results for primary clinical endpoints and SF-36 outcomes. PubMed and a database of SF-36 publications were searched. We evaluated responsiveness as concordance (both statistically significant or both nonsignificant) between primary clinical and SF-36 outcomes. To determine how often SF-36 physical and mental component summary (PCS, MCS) score changes were of meaningful magnitude, mean net of placebo changes with treatment were compared against the developer's recommended 3-point threshold for a minimal important difference (MID) across groups of medical conditions.
RESULTS: Of 805 screened trials, 185 met eligibility criteria. Primary clinical and SF-36 outcomes were concordant in 151 trials (82%). Among clinically efficacious trials, 58% reported net mean SF-36 improvements > /=MID threshold; however, SF-36 changes were often modest (PCS IQR, 1.6-4.1; MCS IQR, 0.8-3.5). Variations in treatment impact were apparent across conditions. Clinically efficacious therapies for rheumatoid arthritis, psoriatic arthritis, and psoriasis consistently achieved the largest SF-36 improvements, with 87% exceeding MID, whereas no efficacious therapies for peripheral arterial disease or chronic obstructive pulmonary disease achieved MID threshold.
CONCLUSIONS: The SF-36 responds to treatment impact, distinguishing drug therapies that, on average, produce meaningful functional health benefits. Overall, just over half of clinically efficacious trials report meaningful functional health improvements, and results vary widely by medical condition.
ATM increases activation-induced cytidine deaminase activity at downstream S regions during class-switch recombination
Activation-induced cytidine deaminase (AID) initiates Ab class-switch recombination (CSR) in activated B cells resulting in exchanging the IgH C region and improved Ab effector function. During CSR, AID instigates DNA double-strand break (DSB) formation in switch (S) regions located upstream of C region genes. DSBs are necessary for CSR, but improper regulation of DSBs can lead to chromosomal translocations that can result in B cell lymphoma. The protein kinase ataxia telangiectasia mutated (ATM) is an important proximal regulator of the DNA damage response (DDR), and translocations involving S regions are increased in its absence. ATM phosphorylates H2AX, which recruits other DNA damage response (DDR) proteins, including mediator of DNA damage checkpoint 1 (Mdc1) and p53 binding protein 1 (53BP1), to sites of DNA damage. As these DDR proteins all function to promote repair and recombination of DSBs during CSR, we examined whether mouse splenic B cells deficient in these proteins would show alterations in S region DSBs when undergoing CSR. We find that in atm(-/-) cells Smu DSBs are increased, whereas DSBs in downstream Sgamma regions are decreased. We also find that mutations in the unrearranged Sgamma3 segment are reduced in atm(-/-) cells. Our data suggest that ATM increases AID targeting and activity at downstream acceptor S regions during CSR and that in atm(-/-) cells Smu DSBs accumulate as they lack a recombination partner.
BACKGROUND: Quantifying the severity of delirium is essential to advancing clinical care by improved understanding of delirium effect, prognosis, pathophysiology, and response to treatment.
OBJECTIVE: To develop and validate a new delirium severity measure (CAM-S) based on the Confusion Assessment Method.
DESIGN: Validation analysis in 2 independent cohorts.
SETTING: Three academic medical centers.
PATIENTS: The first cohort included 300 patients aged 70 years or older scheduled for major surgery. The second included 919 medical patients aged 70 years or older.
MEASUREMENTS: A 4-item short form and a 10-item long form were developed. Association of the maximum CAM-S score during hospitalization with hospital and posthospital outcomes related to delirium was evaluated.
RESULTS: Representative results included adjusted mean length of stay, which increased across levels of short-form severity from 6.5 days (95% CI, 6.2 to 6.9 days) to 12.7 days (CI, 11.2 to 14.3 days) (P for trend and < 0.001) and across levels of long-form severity from 5.6 days (CI, 5.1 to 6.1 days) to 11.9 days (CI, 10.8 to 12.9 days) (P for trend andlt; 0.001). Representative results for the composite outcome of adjusted relative risk of death or nursing home residence at 90 days increased progressively across levels of short-form severity from 1.0 (referent) to 2.5 (CI, 1.9 to 3.3) (P for trend andlt; 0.001) and across levels of long-form severity from 1.0 (referent) to 2.5 (CI, 1.6 to 3.7) (P for trend and < 0.001).
LIMITATION: Data on clinical outcomes were measured in an older data set limited to patients aged 70 years or older.
CONCLUSION: The CAM-S provides a new delirium severity measure with strong psychometric properties and strong associations with important clinical outcomes.
PRIMARY FUNDING SOURCE: National Institute on Aging.
Preventive behaviors and knowledge of tick-borne illnesses: results of a survey from an endemic area
CONTEXT: Lyme disease (LD) is the most commonly reported vector-borne illness in the United States. With physically and economically burdensome effects, it is a concern of public health officials.
OBJECTIVES: To assess knowledge and preventive behaviors of individuals in the endemic area of Martha's Vineyard, Massachusetts, to better understand how sociodemographic data and knowledge correlate with preventive behaviors, and to update previous island studies.
DESIGN: A 30-item paper-based anonymous survey in either English or Portuguese based on language preference.
SETTING: The island of Martha's Vineyard and the ferry between island and mainland.
PARTICIPANTS: A total of 946 participants were recruited at 1 of 4 island locations. The majority of participants were traveling by ferry to and from Martha's Vineyard. To reach 2 populations potentially at high risk, that is, youths and outdoor workers, 3 additional venues included the island high school, an English-as-a-Second-Language class, and a local Brazilian church.
OUTCOME MEASURES: Four specific preventive behaviors as well as an overall composite prevention score.
RESULTS: Participants' knowledge of tick-borne illnesses was poor, and the frequency of practicing preventive behaviors was low; the most commonly reported behavior was checking one's skin for ticks (45%). Approximately one-third of respondents (37%) stated that they did not know the late symptoms of untreated LD, nor did they know early LD treatment options (49%). The 2 high-risk groups reported little participation in preventive measures. In multivariate analyses, only 4 characteristics-older age, confidence in telling deer tick from wood tick, seeing tick-borne illness as a serious threat, and certainty in ability to identify LD symptoms-attained significance associated with preventive behavior as an overall composite score.
CONCLUSIONS: Public health interventions focusing on accurately communicating risk, improving knowledge both of LD symptoms and of ticks that carry the disease, as well as teaching preventive behaviors may help reduce tick-borne illness rates.
BACKGROUND: Chronic liver disease presents a relative contraindication to warfarin therapy, but some patients with liver disease nevertheless require long-term anticoagulation. The goal is to identify which patients with liver disease might safely receive warfarin.
METHODS AND RESULTS: Among 102 134 patients who received warfarin from the Veterans Affairs from 2007 to 2008, International Classification of Diseases-Ninth Revision codes identified 1763 patients with chronic liver disease. Specific diagnoses and laboratory values (albumin, aspartate aminotransferase, alanine aminotransferase, creatinine, and cholesterol) were examined to identify risk of adverse outcomes, while controlling for available bleeding risk factors. Outcomes included percent time in therapeutic range, a measure of anticoagulation control, and major hemorrhagic events, by International Classification of Diseases-Ninth Revision codes. Patients with liver disease had lower mean time in therapeutic range (53.5%) when compared with patients without (61.7%; P < 0.001) and more hemorrhages (hazard ratio, 2.02; P < 0.001). Among patients with liver disease, serum albumin and creatinine levels were the strongest predictors of both outcomes. We created a 4-point score system: patients received 1 point each for albumin (2.5-3.49 g/dL) or creatinine (1.01-1.99 mg/dL), and 2 points each for albumin ( < 2.5 g/dL) or creatinine ( > /=2 mg/dL). This score predicted both anticoagulation control and hemorrhage. When compared with patients without liver disease, those with a score of zero had modestly lower time in therapeutic range (56.7%) and no increase in hemorrhages (hazard ratio, 1.16; P=0.59), whereas those with the worst score (4) had poor control (29.4%) and high hazard of hemorrhage (hazard ratio, 8.53; P < 0.001).
CONCLUSIONS: Patients with liver disease receiving warfarin have poorer anticoagulation control and more hemorrhages. A simple 4-point scoring system using albumin and creatinine identifies those at risk for poor outcomes.
AIMS: Hispanic women are at increased risk of gestational diabetes mellitus (GDM) as compared to non-Hispanic white women. While smoking has been associated with increased risk of type 2 diabetes, studies of smoking and GDM are sparse and conflicting. Therefore, we evaluated the relationship between cigarette smoking and GDM in Hispanic women.
METHODS: We conducted a pooled analysis of two Hispanic datasets based in Massachusetts: the UMass Medical Health Care dataset and the Proyecto Buena Salud dataset. A total of 3029 Hispanic prenatal care patients with singleton gestations were included. Cigarette smoking prior to and during pregnancy was collected via self-report. Diagnosis of GDM was abstracted from medical records and confirmed by study obstetricians.
RESULTS: One-fifth of participants (20.4%) reported smoking prior to pregnancy, and 11.0% reported smoking in pregnancy. A total of 143 women (4.7%) were diagnosed with GDM. We did not observe an association between pre-pregnancy cigarette smoking and odds of GDM (multivariable OR=0.77, 95% CI 0.47, 1.25). In contrast, smoking during pregnancy was associated with a 54% reduction in odds of GDM (OR=0.46, 95% CI 0.22, 0.95). However, this association was no longer statistically significant after adjustment for age, parity, and study site (OR=0.47, 95% CI 0.23, 1.00).
CONCLUSIONS: In this population of Hispanic pregnant women, we did not observe statistically significant associations between pre-pregnancy smoking and odds of GDM. A reduction in odds of GDM among those who smoked during pregnancy was no longer apparent after adjustment for important diabetes risk factors.
Linkage of a de-identified United States rheumatoid arthritis registry with administrative data to facilitate comparative effectiveness research
OBJECTIVE: Linkages between registries and administrative data may provide a valuable resource for comparative effectiveness research. However, personal identifiers that uniquely identify individuals are not always available. Here we describe methods to link a de-identified arthritis registry and US Medicare data. The linked data set was also used to evaluate the generalizability of the registry to the US Medicare population.
METHODS: Rheumatoid arthritis (RA) patients participating in the Consortium of Rheumatology Researchers of North America (CORRONA) registry were linked to Medicare data restricted to rheumatology claims or claims for RA. Deterministic linkage was performed using age, sex, provider identification number, and geographic location of the CORRONA site. We then searched for visit dates in Medicare matching visit dates in CORRONA, requiring > /=1 exact matching date. Linkage accuracy was quantified as a positive predictive value in a subcohort (n = 1,581) with more precise identifiers.
RESULTS: CORRONA participants with self-reported Medicare (n = 11,001) were initially matched to 30,943 Medicare beneficiaries treated by CORRONA physicians. A total of 8,431 CORRONA participants matched on > /=1 visit; 5,317 matched uniquely on all visits. The number of patients who linked and linkage accuracy (from the subcohort) were high for patients with > 2 visits (n = 3,458, 98% accuracy), exactly 2 visits (n = 822, 96% accuracy), and 1 visit (n = 1,037, 79% accuracy) that matched exactly on calendar date. Demographics and comorbidity profiles of registry participants were similar to nonparticipants, except participants were more likely to take disease-modifying antirheumatic drugs and biologic agents.
CONCLUSION: Linkage between a national, de-identified outpatient arthritis registry and Medicare data on multiple nonunique identifiers appears feasible and valid.