Table 3. Baseline variables associated with changes in CD4 count among the cohort.^* .

Model 1	CD4 count (non-transformed)
Predictor variables	Coefficient	SE	95% CI	P-value
Age	−0.97	0.59	−2.13, 0.18	0.099
Hgb level	0.003	0.66	−1.28, 1.29	0.994
WHO stage
Stage I	ref	ref	Ref	Ref
Stage II	9.28	23.31	−36.40, 54.97	0.690
Stage III	25.63	22.73	−18.91, 70.18	0.259
Stage IV	15.69	28.55	−40.26, 71.64	0.583
Weight	0.12	0.51	−0.88, 1.12	0.818
Functional status
Working	ref	ref	Ref	Ref
Ambulatory	−20.70	12.98	−46.15, 4.75	0.111
Bedridden	−43.28	29.73	−101.56, 14.99	0.146
Time of visit in months	7.91	0.22	7.48, 8.34	0.000
Model 2	Based on square root transformation of CD4 count measurements
Age	−0.018	0.02	−0.05, 0.02	0.295
Hgb level	0.001	0.02	−0.04, 0.04	0.975
WHO stage
Stage I	ref	ref	Ref	Ref
Stage II	0.18	0.68	−1.15, 1.51	0.789
Stage III	0.65	0.66	−0.64, 1.95	0.323
Stage IV	0.006	0.83	−1.62, 1.63	0.994
Weight	−0.002	0.01	−0.03, 0.03	0.886
Functional status
Working	ref	ref	Ref	Ref
Ambulatory	−0.78	0.38	−1.52, −0.04	0.038
Bedridden	−1.62	0.86	−3.31, 0.06	0.058
Time of visit in months	0.24	0.01	0.23, 0.25	0.000

^*Model 2 was used for interpreting the results; the findings are based on all observations of CD4 counts up to the 60^th month.