Table 1

Prevalence and incidence of serological markers of syphilis in Mwanza Region, Tanzania, by age at baseline and sex

Baseline prevalenceIncidence over 2 years
NoTPHA +veTPHA +ve RPR +veTPHA +ve RPR ≥1:8No*TPHA +ve
*Number seen at follow up and TPHA negative at baseline.
Males
15–19 years104333 (3.2%)21 (2.0%)17 (1.6%)69433 (4.8%)
20–24 years1053125 (11.9%)84 (8.0%)76 (7.2%)63828 (4.4%)
25–34 years1817303 (16.7%)165 (9.1%)129 (7.1%)99945 (4.5%)
35–44 years1065223 (20.9%)116 (10.9%)77 (7.2%)62020 (3.2%)
45–54 years978173 (17.7%)70 (7.2%)45 (4.6%)63422 (3.5%)
Total5956857 (14.4%)456 (7.7%)344 (5.8%)3585148 (4.1%)
Females
15–19 years1175103 (8.8%)78 (6.6%)68 (5.8%)64744 (6.8%)
20–24 years1365207 (15.2%)144 (10.5%)104 (7.6%)76721 (2.7%)
25–34 years1968375 (19.1%)215 (10.9%)147 (7.5%)109220 (1.8%)
35–44 years1174228 (19.4%)99 (8.4%)65 (5.5%)73517 (2.3%)
45–54 years948157 (16.6%)69 (7.3%)43 (4.5%)59616 (2.7%)
Total66301070 (16.1%)605 (9.1%)427 (6.4%)3837118 (3.1%)