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    The following is a list of publications by Robert D. Gibbons, Donald Hedeker, and colleagues, that are of relevance to this area.  
       
       
    Gibbons, R.D., Clark, D., and Davis, J.M. A statistical model for the classification of imipramine response in depressed inpatients.
Psychopharmacology, vol. 78, no. 2, pp. 185-189, October 1982.
 
       
       
    Gibbons, R.D. and Davis, J.M. The price of beer and the salaries of priests: analysis and display of longitudinal psychiatric data.
Archives of General Psychiatry, vol. 41, pp. 1183-1184, December 1984.
 
       
       
    Gibbons, R.D. and Bock, R.D. Trend in Correlated Proportions.
Psychometrika, vol. 52, no. 1, pp. 113-124, March 1987.
 
       
       
    Gibbons, R.D., Hedeker, D., and Davis, J.M. Regression toward the mean: more on the price of beer and the salaries of priests.
Psychoneuroendocrinology, vol. 12, no. 3, pp. 185-192, 1987.
 
       
       
    Clark, D.C. and Gibbons, R.D. Does one nonlethal suicide attempt increase the risk for a subsequent nonlethal attempt?
Medical Care, vol. 25, no. 12, pp. S87-S88, December 1987.
 
       
       
    Gibbons, R.D., Hedeker, D., Waternaux, C., and Davis, J.M. Random regression models: a comprehensive approach to the analysis of longitudinal psychiatric data.
Psychopharmacology Bulletin, vol. 24, no. 3, pp. 438-443, 1988.
 
       
       
    Hedeker, D., Gibbons, R.D., Waternaux, C., and Davis, J.M.
Investigating drug plasma levels and clinical response using random regression models. View PDF
Psychopharmacology Bulletin, vol. 25, no. 2, pp. 227-231, 1989.
 
       
       
    Clark, D.C., Gibbons, R.D., Fawcett, J., and Sheftner, W.A. What is the mechanism by which suicide attempts predispose to later suicide attempts? A mathematical model.
Journal of Abnormal Psychology, vol. 98, no. 1, pp. 42-49, February 1989.
 
       
       
    Hedeker, D., Gibbons, R.D., and Davis, J.M.
Random regression models for multicenter clinical trials data. View PDF
Psychopharmacology Bulletin, vol. 27, no. 1, pp. 73-77, 1991.
 
       
       
    Sharma, R.P., Hedeker, D., Pandey, G., Janicak, P.G., and Davis, J.M. A longitudinal study of plasma cortisol and depressive symptomatology by random regression analysis.
Biological Psychiatry, vol. 31, no. 3, pp. 304-314, February 1992.
 
       
       
    Gibbons, R.D., Hedeker, D., Elkin, I., Waternaux, C.,
Kraemer, H.C., Greenhouse, J.B., Shea, M.T., Imber, S.D., Sotsky, S.M., and Watkins, J.T. Some conceptual and statistical issues in analysis of longitudinal psychiatric data.
Archives of General Psychiatry, vol. 50, pp. 739-750, 1993.
 
       
       
    Gibbons, R.D. and Hedeker, D. Application of random-effects probit regression models. View PDF
Journal of Consulting and Clinical Psychology, vol. 62, no. 2,
pp. 285-296, April 1994.
 
       
       
    Hedeker, D., Gibbons, R.D., and Flay, B.R. Random-effects regression models for clustered data with an example from smoking prevention research. View PDF
Journal of Consulting and Clinical Psychology, vol. 62, no. 4,
pp. 757-765, August 1994.
 
       
       
    Gibbons, R.D., Hedeker, D., Charles, S.C., and Frisch, P.R.
A random-effects probit model for predicting medical malpractice claims. View PDF
Journal of the American Statistical Association, vol. 89, no. 427, pp. 760-767, September 1994.
 
       
       
    Hedeker, D. and Gibbons, R.D. A random-effects ordinal regression model for multilevel analysis. View PDF
Biometrics, vol. 50, no. 4, pp. 933-944, December 1994.
 
       
       
    Hedeker, D., McMahon, S.D., Jason, L.A., and Salina, D. Analysis of clustered data in community psychology: with an example from a worksite smoking cessation project. View PDF
American Journal of Community Psychology, vol. 22, no. 5,
pp. 595-615, October 1994.
 
       
       
    Hedeker, D., Flay, B.R., and Petraitis, J. Estimating individual influences of behavioral intentions: an application of random-effects modeling to the theory of reasoned action. View PDF
Journal of Consulting and Clinical Psychology, vol. 64, no. 1,
pp. 109-120, February 1996.
 
       
       
    Hedeker, D. and Gibbons, R.D. MIXOR: a computer program for mixed-effects ordinal regression analysis. View PDF
Computer Methods and Programs in Biomedicine, vol. 49, no. 2, pp. 157-176, March 1996.
 
       
       
    Hedeker, D. and Gibbons, R.D. MIXREG: a computer program for mixed-effects regression analysis with autocorrelated errors. View PDF
Computer Methods and Programs in Biomedicine, vol. 49, no. 3, pp. 229-252, May 1996.
 
       
       
    Hedeker, D. and Mermelstein, R.J. Application of random-effects regression models in relapse research. View PDF
Addiction, vol. 91, supplement 1, pp. S211-S229, December 1996.
 
       
       
    Siddiqui, O., Hedeker, D., Flay, B.R., and Hu, F.B. Intraclass correlation estimates in a school-based smoking prevention study: outcome and mediating variables by gender and ethnicity. View PDF
American Journal of Epidemiology, vol. 144, no. 4, pp. 425-433, 1996.
 
       
       
    Hedeker, D. and Gibbons, R.D. Application of random-effects pattern-mixture models for missing data in longitudinal
studies.
View PDF
Psychological Methods, vol. 2, no. 1, pp. 64-78, March 1997.

RRMPAT.ZIP contains:
- a DVI version of the paper created by LaTex (2 DVI files)
- data and SAS code to perform the random-effects pattern mixture analysis

 
       
       
    Hu, F.B., Goldberg, J., Hedeker, D., Flay, B.R., and Pentz, M.A. Comparison of population-averaged and subject-specific approaches for analyzing repeated binary outcomes.
American Journal of Epidemiology, vol. 147, no. 7, pp. 694-703, April 1997.
 
       
       
    Gibbons, R.D. and Hedeker, D. Random-effects probit and logistic regression models for three-level data. View PDF
Biometrics, vol. 53, no. 4, pp. 1527-1537, December 1997.
 
       
       
    Hedeker, D. and Mermelstein, R.J. A multilevel thresholds of change model for analysis of stages of change data. View PDF
Multivariate Behavioral Research, vol. 33, no. 4, pp. 427-455, 1998.
 
       
       
    Hu, F.B., Goldberg, J., Hedeker, D., and Henderson, W.G. Modeling ordinal responses from co-twin control studies. View PDF
Statistics in Medicine, vol. 17, no. 9, pp. 957-970, December 1998.
 
       
       
   

Hedeker, D. MIXPREG: a computer program for mixed-effects Poisson regression. View PDF
Technical Report, School of Public Health, University of Illinois at Chicago, 1998.

 
       
       
    Hedeker, D., Gibbons, R.D., and Waternaux, C. Sample size estimation for longitudinal designs with attrition: comparing time-related contrasts between two groups. View PDF
Journal of Educational and Behavioral Statistics, vol. 24, no. 1, pp. 70-93, 1999.

RMASS2.EXE is an executable program for sample size determination based on this paper.

Read the program guide. View PDF

 
       
       
    Hedeker, D., Mermelstein, R.J., and Weeks, K.A. The thresholds of change model: an approach to analyzing stages of change data. View PDF
Annals of Behavioral Medicine, vol. 21, no. 1, pp. 61-70, 1999.

THRESHM1.SPS and THRESHM2.SPS contain SPSS macro programs implementing the thresholds of change model.

THRESHM1.SAS and THRESHM2.SAS contain SAS macro programs implementing the thresholds of change model.

 
       
       
   

Hedeker, D. MIXNO: a computer program for mixed-effects nominal logistic regression. View PDF
Journal of Statistical Software, vol. 4, no. 5, pp. 1-92, October 1999.

 
       
       
    Hedeker, D., Siddiqui, O., and Hu, F.B. Random-effects regression analysis of correlated grouped-time survival data. View PDF
Statistical Methods in Medical Research, vol. 9, no. 2,
pp. 161-179, April 2000.
 
       
       
   

Hedeker, D. and Mermelstein, R.J. Analysis of longitudinal substance use outcomes using ordinal random-effects regression models. View PDF
Addiction, vol. 95, supplement 3, pp. S381-S394, November 2000.

 
       
       
    Gibbons, R.D. and Hedeker, D. Applications of mixed-effects models in biostatistics. View PDF
Sankhya: The Indian Journal of Statistics, vol. 62, series B, part 1, pp. 70-103, 2000.
 
       
       
    Hedeker, D. and Rose, J.S. The natural history of smoking: a pattern-mixture random-effects regression model. View PDF
In J.S. Rose, L. Chassin, C.C. Presson, and S.J. Sherman, (Eds.), Multivariate Applications in Substance Use Research. Hillsdale, NJ: Lawrence Erlbaum Associates; 2000. pp. 79-112.
 
       
       
    Hedeker, D. A mixed-effects multinomial logistic regression model. View PDF
Statistics in Medicine, vol. 22, pp. 1433-1446, 2003.
 
       
       
   

Hedeker, D. An introduction to growth modeling. View PDF
In D. Kaplan (Ed.), The Sage Handbook of Quantitative Methodology for the Social Sciences. Thousand Oaks, CA: Sage Publications; 2004. pp. 215-234.

 
       
       
    Hedeker, D. Generalized linear mixed models. View PDF
In B. Everitt and D. Howell (Eds.), Encyclopedia of Statistics in Behavioral Science. New York: John Wiley & Sons; 2005.
 
       
       
    Hedeker, D., Berbaum, M., and Mermelstein, R.J. Location-scale models for multilevel ordinal data: between- and within-subjects variance modeling. View PDF
Journal of Probability and Statistical Science, vol. 4, no. 1,
pp. 1-20, February 2006.
 
       
    SAS code View PDF contains syntax for several of the models and can be used to perform the analyses presented in this article.  
       
       
    Hedeker, D., Mermelstein, R.J., and Flay, B.R. Application of item response theory models for intensive longitudinal data. View PDF
In T.A. Walls and J.L. Schafer (Eds.), Models for Intensive Longitudinal Data. New York: Oxford University Press; 2006.
pp. 84-108.
 
       
    SAS code View PDF contains code for IRT analysis of the LSAT-6 data.  
       
       
    Hedeker, D. and Mermelstein, R.J. Mixed-effects regression models with heterogeneous variance: analyzing Ecological Momentary Assessment (EMA) data of smoking. View PDF
In T.D. Little, J.A. Bovaird, and N.A. Card, (Eds.), Modeling Contextual Effects in Longitudinal Studies. Mahwah, NJ: Lawrence Erlbaum Associates; 2007. pp. 183–206.
 
       
    SAS code View PDF contains syntax for models in TABLE 8.3.  
       
       
    Hedeker, D., Mermelstein, R.J., and Demirtas, H. Analysis of binary outcomes with missing data: missing=smoking, last observation carried forward, and a little multiple imputation. View PDF
Addiction, vol. 102, no. 10, pp. 1564-1573, October 2007.
 
       
    SAS code and data are provided for the logistic regression imputation described in this article. Read the SAS code description. View PDF  
       
       
    Hedeker, D. Multilevel models for ordinal and nominal
variables.
View PDF
In J. de Leeuw and E. Meijer (Eds.), Handbook of Multilevel Analysis. New York: Springer; 2008. pp. 237-274.
 
       
       
    Hedeker, D., Mermelstein, R.J., and Demirtas, H. An application of a mixed-effects location scale model for analysis of Ecological Momentary Assessment (EMA) data. View PDF
Biometrics, vol. 64, no. 2, pp. 627-634, June 2008.
 
       
    SAS code View PDF contains a sample of syntax necessary to run the mixed location scale model described in this article.  
       
       
    Hedeker, D., Mermelstein, R.J., Berbaum, M. and Campbell, R.T. Modeling mood variation associated with smoking: an application of a heterogeneous mixed-effects model for analysis of Ecological Momentary Assessment (EMA) data. View PDF
Addiction, accepted.
 
 
Last updated November 6, 2008