Table 2 Predictors of detectable viral load (>400 copies/ml) - all patients 1997-2009

Age at first cART

<30 years

1.0

30-39

0.89

(0.77, 1.02)

0.100

40-49

0.80

(0.68, 0.93)

0.005

50+

0.59

(0.49, 0.71)

<0.001

Previous mono/double ART

No

1.0

Yes

1.33

(1.19, 1.48)

<0.001

Previous viral load

< = 400 copies/ml

1.0

401-10,000

9.76

(8.79, 10.85)

<0.001

10,001+

8.65

(7.73, 9.67)

<0.001

Missing

6.94

(5.76, 6.01)

<0.001

Current CD4

<100 cells/mm³

1.0

100-199

0.50

(0.42, 0.60)

<0.001

200-349

0.33

(0.27, 0.39)

<0.001

350-499

0.25

(0.21, 0.30)

<0.001

500+

0.18

(0.15, 0.21)

<0.001

Time since first cART

>18 months

1.0

0-9 months

1.34

(1.19, 1.49)

<0.001

9-18 months

1.98

(1.79, 2.19)

<0.001

Year of first cART

1993-96

1.0

1997-99

0.71

(0.63, 0.80)

<0.001

2000-02

0.41

(0.33, 0.52)

<0.001

2003+

0.23

(0.18, 0.29)

<0.001

Year first HIV diagnosis

< = 1989

1.0

1990-94

1.07

(0.95, 1.21)

0.247

1995-99

0.81

(0.70, 0.93)

0.003

2000+

0.89

(0.69, 1.14)

0.365

Not known

0.97

(0.61, 1.56)

0.914