Table 2. Selected demographic and clinical characteristics of specimens tested (n = 1203).
| Variable | N (%) |
| Male | 1003 (83.4) |
| Female | 200 (16.6) |
| Median age in years | 35 |
| Age range in years | 18–85 |
| Additional clinical Information | |
| Available | 878 (73.0) |
| Unavailable | 325 (27.0) |
| Among men, same sex partner in last 12 months | |
| Yes | 612 (50.9) |
| No | 125 (10.4) |
| Unavailable | 466 (38.7) |
| HIV status | |
| Positive | 154 (12.8) |
| Negative | 724 (60.2) |
| Unavailable | 325 (27.0) |
| CD4 count (cells/mm2) among HIV positive | |
| <200 | 3 (0.2) |
| 200–<500 | 64 (5.3) |
| ≥500 | 63 (5.2) |
| Unknown | 24 (2.0) |
| Unavailable | 325 (27.0) |
| Clinical syphilis diagnosis | |
| Primary | 53 (4.4) |
| Secondary | 70 (5.8) |
| Early latent | 91 (7.6) |
| Late Latent/unknown duration | 25 (2.1) |
| Past treated | 248 (20.6) |
| Syphilis, no stage specified | 4 (0.3) |
| Not syphilis | 387 (32.2) |
| Unavailable | 325 (27.0) |
| Serological Syphilis Categorisation | |
| IA reactive/RPR reactive (R≥8) | 404 (33.6) |
| IA reactive/RPR reactive (R = 1:1, 2 or 4) | 121 (10.1) |
| IA reactive/RPR non-reactive | 211 (17.5) |
| IA non-reactive/RPR reactive (R≥2) | 27 (2.2) |
| IA non-reactive/RPR non-reactive (RPR≤1) | 242 (20.1) |
| IA non-reactive/RPR not done* | 198 (16.5) |
* Syphilis testing in Australia involves screening with a treponemal antibody test, followed by RPR, if positive, to stage disease. 198 specimens with non-reactive IA did not have routinely performed RPR results available.