Table 4. Baseline variables associated with changes in weight (in kilograms) among the cohort.^* .

Model 1	Based on non-transformed weight measurements
Predictor variables	Coefficient	SE	95% CI	P-value
Age	0.15	0.04	0.07, 0.23	0.000
Hgb level	0.11	0.04	0.02, 0.19	0.013
WHO stage
Stage I	ref	ref	Ref	ref
Stage II	−4.69	1.59	−7.82, −1.57	0.003
Stage III	−3.80	1.56	−6.85, −0.74	0.015
Stage IV	−3.94	1.93	−7.72, 0.15	0.042
CD4 count	0.01	0.00	0.01, −0.00	0.021
Functional status
Working	ref	ref	Ref	ref
Ambulatory	−4.50	0.88	−6.23, −2.77	0.000
Bedridden	−7.66	1.83	−11.25, −4.06	0.000
Time of visit in months	0.15	0.01	0.13, 0.18	0.000
Model 2	Based on square root transformation of weight measurements
Age	0.01	0.00	0.00, 0.01	0.000
Hgb level	0.01	0.00	0.01, 0.01	0.016
WHO stage
Stage I	ref	ref	Ref	ref
Stage II	−0.29	0.11	−0.51, −0.08	0.006
Stage III	−0.24	0.11	−0.45, −0.03	0.006
Stage IV	−0.27	0.13	−0.53, −0.01	0.040
CD4 count	0.0004	0.00	0.00, 0.00	0.012
Functional status
Working	ref	ref	Ref	ref
Ambulatory	−0.31	0.06	−0.42, 0.19	0.000
Bedridden	−0.53	0.13	−0.78, −0.28	0.000
Time of visit in months	0.01	0.00	0.01, 0.01	0.000

^*Model 1 was used for interpretation; the findings are based on all observations of CD4 counts up to the 60^th month.