Table 2 Model for CD4 count (absolute and percentage)

Predictor

Parameter Estimate (SE)

p-value

Parameter Estimate (SE)

p-value

Intercept

7.9 (0.6)

<0.0001

20.7 (5.1)

0.0001

Age at ART Initiation (months)

-0.02 (0.003)

<0.0001

-0.11 (0.01)

0.0004

Number of Available Visits Since ART Initiation

-0.04 (0.04)

0.32

0.93 (0.7)

0.15

Gender

  Female

-0.04 (0.2)

0.85

2.2 (2.0)

0.29

  Male (Reference)

Primary Caregiver

  Parent

0.3 (0.2)

0.07

1.4 (2.2)

0.52

  Other (Reference)

WHO HIV Clinical Stage

-0.2 (0.2)

0.15

-1.5 (1.1)

0.18

ART Therapy

  3TC, ZDV, EFV

0.1 (0.3)

0.66

2.7 (3.0)

0.38

  Other

-0.01 (0.4)

0.98

-4.0 (4.9)

0.41

  3TC, ZDV, NVP (Reference)

Time Post Initiation of ART Therapy (months)

-0.10 (0.06)

0.09

3.6 (0.7)

<0.0001

Squared Time Post Initiation of ART Therapy (months)

0.004 (0.002)

0.07

-0.12 (0.03)

0.0003

Interaction Between Time and Age at ART Initiation

0.001 (0.0004)

0.01

-

-

Interaction Between Squared Time and Age at ART Initiation

-0.3^-4 (0.1^-4)

0.03

-

-

Interaction Between Time and Female Gender

0.05 (0.03)

0.11

-

-

Interaction Between Squared Time and Female Gender

-0.002 (0.001)

0.06

-

-

Interaction Between Time and WHO HIV Clinical Stage

0.04 (0.02)

0.05

-

-

Interaction Between Squared Time and WHO HIV Clinical Stage

-0.001 (0.0007)

0.09

-

-

Interaction between Time and Number of Visits

-

-

-0.39 (0.11)

0.0003

Interaction Between Squared Time and Number of Visits

-

-

0.01 (0.005)

0.0018