Table 2 Behavioural, epidemiological, and cost parameters: Base case values and ranges

Condom use, without participation in intervention (ρ_b)

53.2%

-

Greenberg et al [10], as described in appendix

Condom use, with participation in full intervention (ρ_i)

57.7%

55.45% – 59.95%

Greenberg et al [10], as described in appendix

Condom use, with participation in condom use skills component of intervention (ρ_i)

56.8%

55% – 58.6%

Greenberg et al [10], as described in appendix

Annual probability of HIV infection without participation in intervention (P)

0.019

0.0095 – 0.029

Various (see text)

Condom effectiveness (ε)

95%

85% – 98%

Pinkerton and Abramson [25]

Number of women in intervention (N)

266

-

Greenberg et al (2000) [10]

Duration of intervention effect in months (D)

6

3 – 9

Greenberg et al (2000) [10]

Societal cost per case of HIV (includes direct medical care costs, lost economic productivity and other indirect costs)

$337,000

$169,000 – $506,000

Holtgrave and Pinkerton [27] and Mullins et al [28], as described in text

Direct medical care costs per case of HIV

$195,000

$98,000 – $293,000

Holtgrave and Pinkerton [27]

Number of QALYs saved per HIV infection averted

11.23

9.34 – 13.18

Holtgrave and Pinkerton [27]