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Table 5 Comparing covariance structures for a model with fixed predictors and random effects, Felege Hiwot Referral Hospital, 2010–2014

From: Predictors of CD4 count over time among HIV patients initiated ART in Felege Hiwot Referral Hospital, northwest Ethiopia: multilevel analysis

Covariance structure −2LL AIC BIC
Unstructured 67225.147 67233.155 67259.324
Compound symmetry 67757.63 67763.636 67788.451
AR (1) 67758.375 67767.636 67803.264
  1. 2LL log likelihood, AIC akakie information criteria, BIC Bayesian information criteria