Abhik Roy
Columbia University
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Publication
Featured researches published by Abhik Roy.
World Journal of Gastroenterology | 2016
Jordan Axelrad; Abhik Roy; Garrett Lawlor; Burton I. Korelitz; Simon Lichtiger
The use of thiopurines in inflammatory bowel disease (IBD) has been examined in numerous prospective, controlled trials, with a majority demonstrating a clinical benefit. We conducted this review to describe the historical and current evidence in the use of thiopurines in IBD. A systematic search was performed on MEDLINE between 1965 and 2016 to identify studies on thiopurines in IBD. The most robust evidence for thiopurines in IBD includes induction of remission in combination with anti-tumor necrosis factor (anti-TNF) agents, and maintenance of remission and post-operative maintenance in Crohn’s disease. Less evidence exists for thiopurine monotherapy in induction of remission, maintenance of ulcerative colitis, chemoprevention of colorectal cancer, and in preventing immunogenicity to anti-TNF. Evidence was often limited by trial design. Overall, thiopurines have demonstrated efficacy in a broad range of presentations of IBD. With more efficacious novel therapeutic agents, the positioning of thiopurines in the management of IBD will change and future studies will analyze the benefit of thiopurines alone and in conjunction with these new medications.
Inflammatory Bowel Diseases | 2016
Abhik Roy; Simon Lichtiger
Background:Prolonged antibiotic use is limited by several adverse effects, one of which is Clostridium difficile infection (CDI). The aim of this study was to determine the incidence of CDI in patients receiving chronic antibiotic treatment for Crohns disease (CD). Methods:We conducted a retrospective review of 100 patients with CD for which ≥6 months of outpatient antibiotic therapy was prescribed. Data were collected regarding demographics, CD phenotype, treatment history, and CDI. The incidence of CDI in our patient population was calculated and compared with historical controls. Results:100 patients were studied—60% of men, mean age 23.9 years at CD diagnosis. Eighty-two percent had disease involving the ileum, and 33% had disease involving the colon. The mean duration of antibiotic therapy was 39.6 months (range, 6–217 months). The most commonly prescribed classes of antibiotics were fluoroquinolones (84%), penicillins (57%), and cephalosporins (32%). Forty-nine percent of patients were treated with concomitant thiopurines, 45% with budesonide, and 41% with biologics. The overall incidence of CDI was 2%. This incidence of CDI was lower than previously reported for non-CD patients receiving chronic antibiotics for continuous-flow left ventricular assist device infections (12.5%) and orthopedic prosthesis infections (22.2%). Conclusions:The incidence of CDI is rare in patients receiving chronic antibiotic treatment for CD, and it seems significantly lower than for non-CD populations reported in the literature.
Digestive and Liver Disease | 2016
Monika Laszkowska; Abhik Roy; Benjamin Lebwohl; Peter H. Green; Heléne E.K. Sundelin; Jonas F. Ludvigsson
BACKGROUND Patients with celiac disease (CD) often have articular complaints, and small prior studies suggest an association with Ehlers-Danlos syndrome (EDS)/joint hypermobility syndrome (JHS). AIMS This study examines the risks of EDS/JHS in patients with CD. METHODS This cohort study compared all individuals in Sweden diagnosed with CD based on small intestinal biopsy between 1969-2008 (n=28,631) to 139,832 matched reference individuals, and to a second reference group undergoing biopsy without having CD (n=16,104). Rates of EDS/JHS were determined based on diagnostic codes in the Swedish Patient Register. Hazard ratios (HRs) for EDS/JHS were estimated through Cox regression. RESULTS There are 45 and 148 cases of EDS/JHS in patients with CD and reference individuals, respectively. This corresponds to a 49% increased risk of EDS/JHS in CD (95%CI=1.07-2.07). The HR for EDS was 2.43 (95%CI=1.20-4.91) and for JHS 1.34 (95%CI=0.93-1.95). Compared to reference individuals undergoing intestinal biopsy, CD was not a risk factor for EDS/JHS. A stronger association was seen in patients initially diagnosed with EDS/JHS and subsequently diagnosed with CD (odds ratio=2.29; 95%CI=1.21-4.34). CONCLUSIONS Individuals with CD have higher risk of EDS/JHS than the general population, which may be due to surveillance bias or factors intrinsic to celiac development.
Therapeutic Advances in Gastroenterology | 2016
Abhik Roy; Shilpa Mehra; Ciaran P. Kelly; Sohaib Tariq; Kumar Pallav; Melinda Dennis; Ann Peer; Benjamin Lebwohl; Peter H. Green; Daniel A. Leffler
Background: There are little data on patient factors that impact diagnosis rates of celiac disease. This study aims to evaluate the association between patient socioeconomic status and the symptoms at diagnosis of celiac disease. Methods: A total of 872 patients with biopsy-proven celiac disease were categorized based on the presence or absence of (1) diarrhea and (2) any gastrointestinal symptoms at diagnosis. Univariate and multivariate analyses were used to assess the association between socioeconomic status and symptoms. Results: Patients without diarrhea at presentation had a higher mean per capita income (US
Headache | 2016
Benjamin Lebwohl; Abhik Roy; Armin Alaedini; Peter H. Green; Jonas F. Ludvigsson
34,469 versus US
Therapeutic Advances in Gastroenterology | 2017
Rajani Sharma; Abhik Roy; Christopher Ramos; Richard Rosenberg; Reuben J. Garcia-Carrasquillo; Benjamin Lebwohl
32,237, p = 0.02), and patients without any gastrointestinal symptoms had a higher mean per capita income (US
Gastroenterology | 2015
Abhik Roy; Michele Pallai; Benjamin Lebwohl; Peter H. Green
36,738 versus US
Thyroid | 2016
Abhik Roy; Monika Laszkowska; Johan Sundström; Benjamin Lebwohl; Peter H. R. Green; Olle Kämpe; Jonas F. Ludvigsson
31,758, p < 0.01) compared with patients having such symptoms. On multivariable analysis adjusting for sex, age, autoimmune or psychiatric comorbidities, and income, per capita income remained a significant predictor of diagnosis without gastrointestinal symptoms (odds ratio: 1.71, 95% confidence interval: 1.17–2.50, p < 0.01), and it showed a trend towards significance in diagnosis without diarrhea (odds ratio: 1.40, 95% confidence interval: 0.98–2.02, p = 0.06). Conclusions: Patients with nonclassical symptoms of celiac disease are less likely to be diagnosed if they are of lower socioeconomic status. Celiac disease may be under-recognized in this population due to socioeconomic factors that possibly include lower rates of health-seeking behavior and access to healthcare.
Digestive Diseases and Sciences | 2016
Abhik Roy; Maria Teresa Minaya; Milka Monegro; Jude Fleming; Reuben K. Wong; Suzanne K. Lewis; Benjamin Lebwohl; Peter H. R. Green
Patients with celiac disease (CD) are reported to be at increased risk for headaches, though large studies are lacking. We aimed to examine the risk of headache‐related healthcare encounters in patients with CD in a nationwide population‐based setting.
Digestive and Liver Disease | 2017
Jonas F. Ludvigsson; Abhik Roy; Benjamin Lebwohl; Peter H. Green; Louise Emilsson
Background: Aspirin, when used with concurrent anticoagulation, increases the risk of gastrointestinal bleeding (GIB). Therefore, multisociety guidelines recommend prophylactic proton-pump inhibitors (PPIs) for patients receiving aspirin and anticoagulation. We aimed to determine rates and predictors of adherence to these recommendations. Methods: All adult inpatients discharged from the hospital on aspirin and anticoagulation from July 2009 to June 2014 were retrospectively evaluated for PPI prescription on discharge instructions. We used univariate and multivariate logistic regression to test for predictors of PPI prescription. Results: A total of 2422 patients were discharged on aspirin and anticoagulation; the mean age was 68 years and 53.2% were male; 42.2% were prescribed a PPI at discharge. On univariate analysis, factors associated with discharge PPI prescription included increased age (47.1% versus 37.9%), white race (47.3% versus 37.1–40.2%), higher aspirin dose (55.1% versus 39.4%), being married (46.2% versus 39.4%) and preadmission PPI use (96.6% versus 23.4%). On multivariate analysis, significant predictors of discharge PPI prescription were age 60–69 years [odds ratio (OR) 1.61] and 70–79 years (OR 1.48), and preadmission PPI use (OR 120.03). Lower odds of discharge PPI prescription included Medicaid (OR 0.55) or Medicare (OR 0.71) insurance, Spanish language (OR 0.63), and lower dose aspirin (81 mg) (OR 0.40). Conclusions: A total of 42.2% of patients discharged on aspirin and anticoagulation were prescribed PPIs. Older age and preadmission PPI use were predictive of PPI prescription, while Medicaid/Medicare insurance, Spanish language, and lower dose aspirin decreased the likelihood of discharge PPI prescription. This creates an opportunity to improve primary GIB prevention through quality improvement interventions.