2006
A Randomized Controlled Trial of a Coping Group Intervention for Adults With HIV Who Are AIDS Bereaved: Longitudinal Effects on Grief
Sikkema KJ, Hansen NB, Ghebremichael M, Kochman A, Tarakeshwar N, Meade CS, Zhang H. A Randomized Controlled Trial of a Coping Group Intervention for Adults With HIV Who Are AIDS Bereaved: Longitudinal Effects on Grief. Health Psychology 2006, 25: 563-570. PMID: 17014273, DOI: 10.1037/0278-6133.25.5.563.Peer-Reviewed Original ResearchConceptsGroup interventionPsychiatric distressCognitive-behavioral group interventionLongitudinal effectsIndividual therapy conditionComplicated grief responsesGlobal psychiatric distressAIDS bereavementReaction IndexTherapy conditionsDistressed peopleDiverse sampleGrief severityIndividual therapyDistressGrief responsesHIV/AIDSLongitudinal dataLong-term effectivenessParticipantsGriefControlled TrialsSeverity scoreInterventionStudy period
2004
Mixed effects multivariate adaptive splines model for the analysis of longitudinal and growth curve data
Zhang H. Mixed effects multivariate adaptive splines model for the analysis of longitudinal and growth curve data. Statistical Methods In Medical Research 2004, 13: 63-82. PMID: 14746441, DOI: 10.1191/0962280204sm353ra.Peer-Reviewed Original Research
1999
Analysis of Infant Growth Curves Using Multivariate Adaptive Splines
Zhang H. Analysis of Infant Growth Curves Using Multivariate Adaptive Splines. Biometrics 1999, 55: 452-459. PMID: 11318199, DOI: 10.1111/j.0006-341x.1999.00452.x.Peer-Reviewed Original Research
1997
Multivariate Adaptive Splines for Analysis of Longitudinal Data
Zhang H. Multivariate Adaptive Splines for Analysis of Longitudinal Data. Journal Of Computational And Graphical Statistics 1997, 6: 74-91. DOI: 10.1080/10618600.1997.10474728.Peer-Reviewed Original ResearchSemi-parametric modelNonparametric modelLongitudinal dataMultivariate adaptive splinesGeneral time trendExistence of autocorrelationMultivariate adaptive regression splinesRandom-effects linear modelsAdaptive regression splinesAdaptive splinesCovariance estimationDesign matrixRegression splinesFast algorithmTime trendsIterative procedureGeneral algorithmLinear modelSplinesModel buildingMean curveEstimationAlgorithmData structureEssential features