Research & Interest

Dr. Comulada is a Senior Statistician at the UCLA Semel Institute, Center for Community Health.  His expertise is in the area of the analysis of longitudinal data, Bayesian data analysis, and sample size determination.  In addition to serving as the statistician on several large NIMH-funded mutli-center behavioral intervention trials, Dr. Comulada provides consultations and oral presentations for researchers at the Center for Community Health to further their understanding of statistics.  Currently, he’s working on a manuscript to develop better ways to analyze longitudinal substance use data which usually contain a lot of zeros due to non-users. 

Selected Publications

• Comulada WS, Weiss RE, Cumberland W, Rotheram-Borus MJ (2007). Reductions in drug use
  among young people living with HIV. American Journal of Drug and Alcohol Abuse. (In press).
  Comulada WS, Weiss RE (2006). On models for binomial data with a random n. Biometrics. (In
  press).
  
  
• Lightfoot M, Rotheram-Borus MJ, Comulada WS, Gundersen G, Reddy V (2006). Self-monitoring
  of behavior as a risk reduction strategy for persons living with HIV. AIDS Care Journal. (In
  press).
  
  
• Lightfoot M, Tevendale H, Comulada WS, Rotheram-Borus MJ (2006). Who benefited from an
  efficacious intervention for youth living with HIV: a moderator analysis. AIDS and Behavior. (In
  press).
  
  
• Lester P, Rotheram-Borus MJ, Lee SJ, Comulada S, Cantwell S, Wu N, Lin YY. Rates and
  predictors of anxiety and depressive disorders in adolescents of parents with HIV (2006).
  Vulnerable Children and Youth Studies. 1 (1): 81-101.
  
  
• Lightfoot M, Comulada WS, and Stover G. Computerized HIV preventive intervention for
  adolescents: indications of Efficacy (2006). American Journal of Public Health. (In press).
  
• Swendeman D, Rotheram-Borus, MJ, Comulada S, Weiss R, Ramos ME. Predictors of HIV-related
  stigma among young people living with HIV (2006). Health Psychology. 25(4): 501-509.
  
  
• Saab S, Niho H, Comulada WS, Hiatt J, Durazo F, Han S, Farmer DG, Holt C, Yersiz H, Goldstein
  L.I, Ghobrial RM, Busuttil RW (2005). Mortality predictors in liver transplant recipients with
  recurrent hepatitis C cirrhosis. Liver International. 25: 940-945.
  
  
• Lightfoot M, Swendeman D, Rotheram-Borus MJ, Comulada WS, Weiss RE (2005). Variation in
  the risk behaviors of youth living with HIV: pre- and post-HAART. American Journal of Health
  Behavior. 29 (2): 162-171.
  
  
• Rotheram-Borus MJ, Swendeman D, Comulada WS, Weiss RE (2004). Prevention for HIV positive
  young people: telephone and in-person delivery. JAIDS. 37 (2): S68-77.
  
  
• Saab S, Chang AJ, Comulada WS, Geevarghese SK, Anselmo RDM, Durazo F, Han S, Farmer DG,
  Yersiz H, Goldstein LI, Ghobrial RM, and Busuttil RW (2003). Outcomes of hepatitis C– and
  hepatitis B core antibody–positive grafts in orthotopic liver transplantation. Liver
  Transplantation. 9 (10): 1053-1061.
  
  
• Comulada WS, Swendeman DT, Rotheram-Borus MJ, Mattes KM, and Weiss RE. Use of HAART
  among young people living with HIV (2003). American Journal of Health Behavior. 27 (4): 389-
  400.