| Heard of syphilis | 96.7 | 92.2 | 0.000 |
| Ever had a syphilis test | 52.7 | 39.9 | 0.000 |
| Ever used a condom | 88.8 | 75.5 | 0.000 |
| Used a condom at last intercourse | 44.0 | 33.2 | 0.000 |
| High/drunk last time had sex | 31.7 | 43.0 | 0.000 |
| Transmitted by skin contact | 42.8 | 36.5 | 0.04 |
| Transmitted by needle sharing | 82.5 | 71.0 | 0.000 |
| Transmitted from mother to fetus | 89.0 | 81.5 | 0.000 |
| Transmitted from toilet seats | 38.8 | 47.8 | 0.003 |
| There are warning signs of syphilis | 76.0 | 70.6 | 0.04 |
| Blindness is a warning sign of syphilis | 72.6 | 61.8 | 0.001 |
| Skin spots are a warning sign | 78.5 | 72.8 | 0.06 |
| Possible for person to carry syphilis without warning signs | 67.0 | 59.9 | 0.04 |
| Possible to get re-infected | 12.0 | 5.5 | 0.001 |
| Correlation between number of products seen and total knowledge of syphilis | | r = 0.12 | 0.001 |