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. Author manuscript; available in PMC: 2009 Jan 7.
Published in final edited form as: Psychosom Med. 2005;67(6):1013–1021. doi: 10.1097/01.psy.0000188569.58998.c8

TABLE 6.

Basic Model Including Coefficients and Significance Tests for Level 1 and Level 2 Covariates in Prediction of Viral Load (Log) Slope Over 2 Years

Coefficient Standard Error t Ratio df p
Fixed Effects
  VLlog intercept, β0
    Intercept, γ00 4.3791 0.0965 45.40 176 <.001
  VLlog slope (per month), β1
   Average slope, γ10 0.01371 0.0069 1.974 171 .050
   Baseline VLlog, γ11 0.00089 0.0026 0.340 171 .734
   Age, γ12 0.00003 0.0003 0.075 171 .940
   Gender, γ13 0.00549 0.0065 0.846 171 .399
   Ethnicity, γ14 0.00821 0.0064 1.289 171 .199
   Education, γ15 −0.00533 0.0026 −2.207 171 .029
  Antiretroviral 1 increment, β2
   Average increment, γ20 −1.03267 0.1212 −8.520 720 <.001
  Antiretroviral 2 increment, β30
   Average increment, γ30 −1.04281 0.1112 −9.376 720 <.001
Random effects SD Variance df χ2 p Value
   Intercept, U0 0.8787 0.7721 175 702.16 <.001
   Slope, U1 0.0193 0.0004 170 235.62 .001
   Error, R 0.6192 0.383