Intervention effectiveness calculations (1998–9)
| A | ||||
|---|---|---|---|---|
| Adverse birth outcomes | Stillbirth | Low birth weight | ||
| Numbers susceptible | 187 (HTAS cases)* | 140 (live births) | ||
| % adverse outcome | 25% | 33% | ||
| Attributable fraction** | 94% | 67% | ||
| Adverse birth outcomes averted‡ | 44 | 31 | ||
| B | ||||
|---|---|---|---|---|
| DALYs | Life expectancy | |||
| Tanzania | WDR† | Tanzania | WDR† | |
| Years of life lost (YLL) | ||||
| YLL DALYs per case | 27.25 | 32.40 | 27.25 | 32.40 |
| Number (%) deaths | 44 (100%) | 4 (13%) | ||
| Total YLL DALYS§ | 1195 | 1420 | 112 | 133 |
| Years lived with disability (YLD) | ||||
| YLD DALYs per case | 0 | 0 | 7.93 | 9.42 |
| Numbers (%) of cases disabled | 0 (0%) | 1.9 (6%) | ||
| Total YLD DALYS§ | 0 | 0 | 15 | 18 |
| DALYS saved | 1195 | 1420 | 127 | 151 |
| C | ||||
|---|---|---|---|---|
| Stillbirth and LBW | ||||
| Tanzania | WDR* | |||
| *Syphilis was defined as HTAS when the RPR was reactive at a dilution of >1:8. | ||||
| **The estimated portion of adverse events in women with HTAS that were attributable to syphilis. | ||||
| †World Development Report 1993.3 | ||||
| ‡Adverse birth outcomes = numbers susceptible × percentage adverse outcomes × attributable fractions. | ||||
| §YLL = YLL DALYs per case × number of deaths; YLD = YLD DALYs per case × number of cases disabled. | ||||
| Total DALYs saved | 1321 | 1571 | ||