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Table 5 Univariate sensitivity analyses: Estimated cost per HIV case averted over a range of parameter values

From: The cost-effectiveness of the WINGS intervention: a program to prevent HIV and sexually transmitted diseases among high-risk urban women

 

Indirect HIV costs included

Indirect HIV costs excluded

Parameter varied

Complete intervention

Condom use skills component

Complete intervention

Condom use skills component

Annual probability of acquiring HIV = 0.0095

$771,037

$249,215

$913,037

$391,215

Annual probability of acquiring HIV = 0.029

$24,186

cost-saving

$166,186

cost-saving

Condom use = 55.45% (55% for condom use skills component)

$768,380

$247,809

$910,380

$389,809

Condom use = 59.95% (58.6% for condom use skills component)

$31,460

cost-saving

$173,460

cost-saving

Duration of intervention effect (months) = 3

$765,735

$246,410

$907,735

$388,410

Duration of intervention effect (months) = 9

$32,343

cost-saving

$174,343

$403

Condom effectiveness = 85%

$347,154

$24,957

$489,154

$166,957

Condom effectiveness = 98%

$181,482

cost-saving

$323,482

$79,307

Intervention cost = $228 ($97 for condom use skills component)

cost-saving

cost-saving

$81,345

cost-saving

Intervention cost = $684 ($290 for condoms use skills component)

$492,035

$102,364

$634,035

$244,364

Cost per case of HIV = $169,000 ($98,000 excluding indirect costs)

$383,690

$123,404

$454,690

$194,404

Cost per case of HIV = $506,000 ($293,000 excluding indirect costs)

$46,690

cost-saving

$259,690

cost-saving

  1. Note: Costs are expressed in 1996 US$. "Cost-saving" indicates that the averted HIV costs exceeded the cost of the intervention.