The percentage increase in the number of STI averted from using a POC test of sensitivity 25%, 50%, or 75% instead of using the gold standard STI test in the scenarios presented in table 1*
| C trachomatis | N gonorrhoeae | |||||
|---|---|---|---|---|---|---|
| Sensitivity of POC test | Sensitivity of POC test | |||||
| 25% | 50% | 75% | 25% | 50% | 75% | |
| *A positive percentage indicates the percentage increase in STI averted from using the POC test in that scenario and vice versa for a negative percentage. The range in parentheses gives the lower and upper estimates when the STI transmission probabilities and condom efficacy estimates are varied. It is assumed there is a 10 day delay in treatment when using the gold standard test, an 80% return rate, and that the gold standard tests for C trachomatis and N gonorrhoeae are 90% sensitive. | ||||||
| No transmission during delay in treatment | −65% | −31% | 4% | −67% | −34% | −1% |
| Sex workers to clients, 1997 (SA) | −29% (−41%, −9%) | 41% (18%, 81%) | 112% (77%, 172%) | 11% (−8%, 31%) | 122% (83%, 162%) | 233% (175%, 293%) |
| Sex workers to clients, 1999 (Benin) | −42% (−52%, −25%) | 15% (−4%, 50%) | 73% (45%, 125%) | −5% (−29%, 41%) | 90% (41%, 183%) | 185% (112%, 324%) |
| Sex workers attending GUM clinic, 1993 (UK) | −59% (−62%, −54%) | −18% (−24%, −8%) | 23% (14%, 38%) | −47% (−56%, −32%) | 7% (−13%, 35%) | 60% (31%, 103%) |
| Women at GUM clinic, 1997 (UK) | −65% (−65%, −65%) | −30% (−30%, −29%) | 6% (5%, 6%) | −64% (−65%, −64%) | −29% (−29%, −29%) | 7% (6%, 7%) |
| Women with long term partnerships, 1994 (Tanzania) | −65% (−65%, −65%) | −30% (−30%, −29%) | 5% (5%, 6%) | −65% (−65%, −64%) | −29% (−30%, −29%) | 6% (6%, 7%) |