Table 2 Knowledge and awareness towards HPV/HPV vaccines between the two groups before and immediately after the intervention
Items | Baseline | Post-intervention | Change percentage point (%) | |||||
|---|---|---|---|---|---|---|---|---|
All, N (%) | Control, n (%) | Intervention, n (%) | p | Control, n (%) | Intervention, n (%) | p | ||
Heard of HPV | Â | Â | Â | Â | Â | Â | Â | Â |
 Yes | 617 (63.8) | 260 (62.8) | 337 (63.3) | 0.863 | 335 (89.1) | 425 (97.9) |  < 0.001 | 34.6 |
 No | 350 (36.2) | 154 (37.2) | 195 (36.7) |  | 41 (10.9) | 9 (2.1) |  |  |
Heard of HPV-related diseases (genital warts, cervical cancer, penile cancer) | ||||||||
 Yes | 641 (66.3) | 275 (66.4) | 347 (65.2) | 0.700 | 290 (77.1) | 410 (94.5) |  < 0.001 | 29.3 |
 No | 326 (33.7) | 139 (33.6) | 185 (34.8) |  | 86 (22.9) | 24 (5.5) |  |  |
Heard of HPV vaccine | Â | Â | Â | Â | Â | Â | Â | |
 Yes | 588 (60.8) | 237 (57.2) | 330 (62.0) | 0.136 | 311 (82.7) | 413 (95.2) |  < 0.001 | 33.2 |
 No | 379 (39.2) | 177 (42.8) | 202 (38.0) |  | 65 (17.3) | 21 (4.8) |  |  |
Persistent HPV infection can cause cervical cancer | Â | Â | Â | Â | Â | Â | ||
 Yes | 678 (70.1) | 272 (65.7) | 388 (72.9) | 0.016 | 270 (71.8) | 423 (97.5) |  < 0.001 | 24.6 |
 No/unknown | 289 (29.9) | 142 (34.3) | 144 (27.1) |  | 106 (28.2) | 11 (2.5) |  |  |
HPV is mainly transmitted through sexual contact intercourse | Â | Â | Â | Â | Â | Â | ||
 Yes | 516 (53.4) | 205 (49.5) | 301 (56.6) | 0.031 | 197 (52.4) | 348 (80.2) |  < 0.001 | 23.6 |
 No/unknown | 451 (46.6) | 209 (50.5) | 231 (43.4) |  | 179 (47.6) | 86 (19.8) |  |  |
Condoms can reduce HPV infection infection | Â | Â | Â | Â | Â | Â | Â | |
 Yes | 345 (35.7) | 139 (33.6) | 196 (36.8) | 0.297 | 117 (31.1) | 210 (48.4) |  < 0.001 | 11.6 |
 No/unknown | 622 (64.3) | 275 (66.4) | 336 (63.2) |  | 259 (68.9) | 224 (51.6) |  |  |
HPV infection is almost asymptomatic | Â | Â | Â | Â | ||||
 Yes | 80 (8.3) | 38 (9.2) | 41 (7.7) | 0.417 | 38 (10.1) | 92 (21.2) |  < 0.001 | 13.5 |
 No/unknown | 887 (91.7) | 376 (90.8) | 491 (92.3) |  | 338 (89.9) | 342 (78.8) |  |  |
HPV infection may result in oral cancer, anal cancer and genital warts | Â | Â | Â | Â | ||||
 Yes | 547 (56.6) | 231 (55.8) | 300 (56.4) | 0.895 | 222 (59.0) | 393 (90.6) |  < 0.001 | 34.2 |
 No/unknown | 420 (43.4) | 183 (44.2) | 232 (43.6) |  | 154 (41.0) | 41 (9.4) |  |  |
HPV infection is common | Â | Â | Â | Â | Â | Â | ||
 Yes | 266 (27.5) | 119 (28.7) | 137 (25.8) | 0.304 | 114 (30.3) | 342 (78.8) |  < 0.001 | 53.0 |
 No/unknown | 701 (72.5) | 295 (71.3) | 395 (74.2) |  | 262 (69.7) | 92 (21.2) |  |  |
Ideal time for HPV vaccination is before sex debut | Â | Â | Â | Â | Â | Â | ||
 Yes | 483 (49.9) | 192 (46.4) | 275 (51.7) | 0.105 | 209 (55.6) | 417 (96.1) |  < 0.001 | 44.4 |
 No/unknown | 484 (50.1) | 222 (53.6) | 257 (48.3) |  | 167 (44.4) | 17 (3.9) |  |  |
Knowledge scores of HPV and HPV vaccines | – | 2.89 ± 1.93 | 3.08 ± 1.89 | 0.381 | 3.10 ± 1.99 | 5.13 ± 1.23 |  < 0.001 | / |