Table 5 Transmission knowledge (percentage of correct answers) among both vaccinated and unvaccinated participants in the first and last rounds
| Â | Round 1a | Round 5 | Â | Â |
|---|---|---|---|---|
Category | n (%) | n (%) | p-value | Mean difference (+ 95% CI) |
Transmission knowledge score (mean 95%CI) | ||||
 Unvaccinated | 7.47 (7.39–7.55) | 7.52 (7.40–7.63) | 0.60 | Ref |
 Vaccinated | 7.39 (7.33–7.45) | 7.53 (7.46–7.61) | 0.01 | 0.01 (−0.10–0.10) |
HPV can be transmitted by | ||||
Holding Hands (No) | ||||
 Unvaccinated | 1002 (99) | 481 (99) |  |  |
 Vaccinated | 1882 (99) | 1034 (99) |  |  |
Deep throat kissing (No) | ||||
 Unvaccinated | 911 (90) | 449 (92) |  |  |
 Vaccinated | 1711 (90) | 968 (93) |  |  |
Skin-to-skin contact (Yes) | ||||
 Unvaccinated | 95 (9) | 36 (7) |  |  |
 Vaccinated | 185 (10) | 71 (7) |  |  |
Stroking partner at genitals (Yes) | ||||
 Unvaccinated | 340 (34) | 126 (26) |  |  |
 Vaccinated | 587 (31) | 258 (25) |  |  |
Public toilet (No) | ||||
 Unvaccinated | 836 (83) | 427 (88) |  |  |
 Vaccinated | 1575 (82) | 927 (89) |  |  |
Unprotected oral sex (Yes) | ||||
 Unvaccinated | 631 (62) | 294 (61) |  |  |
 Vaccinated | 1219 (64) | 640 (62) |  |  |
Unprotected vaginal sex (Yes) | ||||
 Unvaccinated | 967 (95) | 469 (96) |  |  |
Vaccinated | 1818 (95) | 1004 (97) | Â | Â |
Unprotected anal sex (Yes) | ||||
 Unvaccinated | 718 (71) | 349 (70) |  |  |
 Vaccinated | 1345 (70) | 766 (71) |  |  |
Sex with a condom (Yes) | ||||
 Unvaccinated | 156 (15) | 95 (20) |  |  |
 Vaccinated | 238 (12) | 157 (15) |  |  |
Sharing a spoon or cup (No) | ||||
 Unvaccinated | 962 (95) | 464 (95) |  |  |
 Vaccinated | 1777 (93) | 999 (96) |  |  |
Sneezing/coughing (No) | ||||
 Unvaccinated | 959 (95) | 470 (97) |  |  |
 Vaccinated | 1794 (93) | 1010 (97) |  |  |