Table 4 General knowledge (percentage with correct answer) on HPV and cervical cancer among vaccinated and unvaccinated participants on the first and last rounds
| Â | Round 1a | Round 5 | Â | Â |
|---|---|---|---|---|
Category | n (%) | n (%) | p-value | Mean difference (+ 95% CI) |
General knowledge score (mean 95%CI) | ||||
 Unvaccinated | 4.25 (4.14–4.36) | 4.70 (4.54–4.87) | < 0.01 | Ref |
 Vaccinated | 4.29 (4.21–4.37) | 4.92 (4.80–5.03) | < 0.01 | 0.11 (− 0.02–0.23) |
HPV infections are easily treatable (No) | ||||
 Unvaccinated | 142 (14) | 96 (20) |  |  |
 Vaccinated | 284 (15) | 279 (27) |  |  |
HPV infections are rare (No) | ||||
 Unvaccinated | 428 (42) | 232 (48) |  |  |
 Vaccinated | 882 (46) | 554 (53) |  |  |
An HPV infection always leads to cervical cancer (No) | ||||
 Unvaccinated | 690 (68) | 389 (80) |  |  |
Vaccinated | 1294 (64) | 844 (81) | Â | Â |
Cervical cancer is always fatal (No) | ||||
 Unvaccinated | 835 (82) | 427 (88) |  |  |
 Vaccinated | 1579 (82) | 923 (89) |  |  |
Cervical cancer is easily treatable (No) | Â | |||
 Unvaccinated | 178 (18) | 108 (22) |  |  |
 Vaccinated | 408 (21) | 273 (26) |  |  |
Cervical cancer is a common disease (No) | ||||
 Unvaccinated | 237 (23) | 116 (24) |  |  |
 Vaccinated | 334 (17) | 238 (23) |  |  |
If you have unprotected sex, you are at high risk of an HPV infection (Yes) | ||||
 Unvaccinated | 732 (72) | 345 (71) |  |  |
 Vaccinated | 1411 (74) | 782 (75) |  |  |
An HPV infection is a risk for cervical cancer (Yes) | ||||
 Unvaccinated | 815 (80) | 400 (82) |  |  |
 Vaccinated | 1555 (81) | 888 (85) |  |  |
An HPV infection can cause genital warts (Yes) | ||||
 Unvaccinated | 193 (19) | 134 (28) |  |  |
 Vaccinated | 389 (20) | 274 (26) |  |  |
An HPV infection usually disappears on its own (Yes) | ||||
 Unvaccinated | 56 (6) | 42 (9) |  |  |
 Vaccinated | 80 (4) | 61 (6) |  |  |