Table 3 Competing risks regression analysis of time from TB diagnosis to start of antiretroviral therapy (ART) for all patients with CD4 cell count measurements (n = 789)

Age category

0.514

   18-24

1.06

0.83-1.36

0.617

   25-39

1.10

0.93-1.31

0.251

   ≥40

1

Gender

   Female

1.03

0.89-1.19

0.717

   Male

1

Calendar period

0.022

0.013

   Jul 2002 - Aug 2005

1

1

   Sept 2005 - Aug 2006

1.20

1.03-1.41

0.019

1.26

1.05-1.51

0.013

   Sept 2006 - Jan 2008

1.21

1.02-1.45

0.033

1.26

1.04-1.53

0.016

CD4 cell count

< 0.001

0.001

   ≥200

1

1

   100-199

1.65

1.29-2.11

< 0.001

1.46

1.13-1.88

0.004

   50-99

1.92

1.48-2.49

< 0.001

1.83

1.40-2.38

< 0.001

   0-49

1.96

1.50-2.54

< 0.001

1.71

1.30-2.26

< 0.001

TB classification

   Retreatment case

1

   New case

1.04

0.9-1.21

0.586

Type of TB

< 0.001

< 0.001

   Smear-negative PTB

1

1

   EPTB

1.50

1.26-1.79

< 0.001

1.44

1.17-1.76

0.001

   Smear-positive PTB

2.82

2.37-3.37

< 0.001

2.49

2.04-3.04

< 0.001

Place of TB diagnosis

   TB clinic

1

1

   ART clinic

1.91

1.54-2.37

< 0.001

1.88

1.51-2.34

< 0.001