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. Author manuscript; available in PMC: 2013 Apr 19.
Published in final edited form as: AIDS Care. 2011 Jul 18;23(11):1417–1424. doi: 10.1080/09540121.2011.565028

Table 2.

Adjusted odds ratio (aOR) of a joint marginal model for adherence and time interval outcomes with AR(1) working covariance structure

Adherence Time interval

Parameter aOR Pvalue aOR Pvalue
Intercept 2.517 0.019 23.831 <.001
Age 0.989 0.161 1.001 0.466
Gender (ref=male)
 Female 0.312 <.001* 1.020 0.649
Education (ref=sec+)
 No schooling 5.629 0.001* 1.085 0.251
 Primary 1.113 0.810 0.987 0.845
Site (ref=rural)
 Urban site 3.320 <.001* 0.996 0.817
Income (ref=source)
 Not source 0.992 0.921 1.013 0.209
Access to tap water (ref=no)
 Yes 1.127 0.309 1.016 0.948
Hhd with electricity (ref=no)
 Yes 0.993 0.948 1.020 0.238
Cell phone ownership (ref=no)
 Yes 1.269 0.001* 1.005 0.585
Reason for HIV test (ref=unwell)
 No specific reason 0.961 0.796 1.004 0.852
 Possible exposure to HIV 0.641 0.011* 0.984 0.396
Staying with a partner (ref=no)
 Yes 1.347 0.002* 1.0003 0.975
WHO staging of HIV (ref=stage4)
 Stage 1 0.715 0.061 1.025 0.310
 Stage 2 0.781 0.125 1.030 0.174
 Stage 3 0.890 0.426 1.023 0.278
Baseline CD4+ cell count 0.999 0.438 1.00004 0.595
Baseline adh (ref=not adherent)
 Adherent 0.858 0.070 0.011 0.251
Time (follow-up visit) 1.107 <.001* 1.013 <.001*
Baseline weight 0.999 0.795 0.001 0.089
Weight at follow-up visits 0.998 0.665 1.002 0.450
Time*gender (ref=male)
 Female 1.074 <.0001* 1.001 0.760
Time*site (ref=rural site)
 Urban site 0.941 0.0002* 0.993 0.003*
Time*reason for test (ref=unwell)
 No specific reason 0.989 0.560 1.0001 0.965
 Possible exposure to HIV 1.046 0.032* 1.001 0.632
Age*gender (ref=male)
 Female 1.023 0.008* 0.9999 0.914
Age*education (ref=secondary+)
 No schooling 0.965 0.014* 0.998 0.209
 Primary 0.997 0.792 0.9996 0.798
*

Significant at 5% level