Table 2 Factors associated with MVC prescription after a tropism test

 Before 2011

4.16 (2.51–6.89)

3.65 (2.17–6.13)

 After 2011

1

1

Age (years):

 < 35

0.60 (0.25–1.45)

 35–43

0.68 (0.35–1.32)

 44–51

1.1 (0.63–1.93)

 > 51

1

Time between ART initiation and tropism (years):

 < 5

0.50 (0.27–0.92)

 5–10

0.88 (0.49–1.58)

 > 10

1

Number of previous ART regimens:

 < 4

0.24 (0.11–0.51)

0.34 (0.15–0.74)

 4–5

0.25 (0.11–0.55)

0.32 (0.14–0.74)

 6–10

0.39 (0.19–0.79)

0.46 (0.22–0.97)

 > 10

1

1

CD4 count (/mm3):

 ≤200

0.34 (0.13–0.85)

 201–500

0.86 (0.52–1.42)

 > 500

1

Reason for tropism performance:

 Virological failure

1.95 (1.20–3.16)

1.10 (0.62–1.98)

 Other

1

1