Table 1 Baseline characteristics of the mITT cohorts
HPV 16/18 mITT | HPV 16/18/31/33/45/52/58 mITT | |||||
|---|---|---|---|---|---|---|
Nonavalent HPV | Bivalent HPV | Control | Nonavalent HPV | Control | ||
Characteristic | Category | |||||
Total | 496 | 489 | 473 | 325 | 290 | |
Age group (years) | 15–17 | 299 (60.3%) | 278 (56.9%) | 278 (58.8%) | 197 (60.6%) | 168 (57.9%) |
18–20 | 197 (39.7%) | 211 (43.1%) | 195 (41.2%) | 128 (39.4%) | 122 (42.1%) | |
Age (years) | Median (IQR) | 17 (16, 18) | 17 (16, 19) | 17 (16, 19) | 17 (16, 18) | 17 (16, 19) |
Marital status | Never married | 478 (96.4%) | 462 (94.5%) | 446 (94.3%) | 315 (96.9%) | 269 (92.8%) |
Married | 14 (2.8%) | 24 (4.9%) | 20 (4.2%) | 7 (2.2%) | 15 (5.2%) | |
Previously married | 3 (0.6%) | 3 (0.6%) | 7 (1.5%) | 2 (0.6%) | 6 (2.1%) | |
Other | 1 (0.2%) | 0 (0.0%) | 0 (0.0%) | 1 (0.3%) | 0 (0.0%) | |
Education (highest level) | No schooling | 1 (0.2%) | 2 (0.4%) | 1 (0.2%) | 1 (0.3%) | 1 (0.3%) |
Primary school, some or complete | 40 (8.1%) | 30 (6.1%) | 36 (7.6%) | 27 (8.3%) | 27 (9.3%) | |
Secondary school, some or complete | 359 (72.4%) | 368 (75.3%) | 355 (75.1%) | 241 (74.2%) | 220 (75.9%) | |
Post-secondary school | 96 (19.4%) | 89 (18.2%) | 81 (17.1%) | 56 (17.2%) | 42 (14.5%) | |
Earns an income of her own | No | 437 (88.1%) | 417 (85.3%) | 417 (88.2%) | 284 (87.4%) | 248 (85.5%) |
Yes | 59 (11.9%) | 72 (14.7%) | 56 (11.8%) | 41 (12.6%) | 42 (14.5%) | |
Has a current main or steady sexual partner | No | 144 (29.0%) | 152 (31.1%) | 145 (30.7%) | 98 (30.2%) | 95 (32.8%) |
Yes | 352 (71.0%) | 337 (68.9%) | 328 (69.3%) | 227 (69.8%) | 195 (67.2%) | |
Age when first had vaginal intercourse (years) | <15 | 123 (24.8%) | 116 (23.7%) | 103 (21.8%) | 80 (24.6%) | 65 (22.4%) |
15–17 | 265 (53.4%) | 274 (56.0%) | 282 (59.6%) | 185 (56.9%) | 173 (59.7%) | |
≥18 | 96 (19.4%) | 93 (19.0%) | 79 (16.7%) | 54 (16.6%) | 46 (15.9%) | |
Do not remember | 12 (2.4%) | 6 (1.2%) | 9 (1.9%) | 6 (1.8%) | 6 (2.1%) | |
Lifetime number of sex partners | 1 | 322 (64.9%) | 332 (67.9%) | 289 (61.1%) | 217 (66.8%) | 184 (63.4%) |
2 | 121 (24.4%) | 100 (20.4%) | 113 (23.9%) | 78 (24.0%) | 65 (22.4%) | |
≥3 | 53 (10.7%) | 57 (11.7%) | 71 (15.0%) | 30 (9.2%) | 41 (14.1%) | |
Condom use with last vaginal sex | No | 153 (30.8%) | 155 (31.7%) | 140 (29.6%) | 98 (30.2%) | 78 (26.9%) |
Yes | 237 (47.8%) | 235 (48.1%) | 238 (50.3%) | 156 (48.0%) | 144 (49.7%) | |
No sex in past year | 106 (21.4%) | 99 (20.2%) | 95 (20.1%) | 71 (21.8%) | 68 (23.4%) | |
Syphilis | Negative | 496 (100.0%) | 489 (100.0%) | 471 (99.6%) | 325 (100.0%) | 289 (99.7%) |
Positive | 0 | 0 | 1 (0.2%) | 0 | 1 (0.3%) | |
Not done | 0 | 0 | 1 (0.2%) | 0 | 0 | |
Chlamydia trachomatis | Negative | 438 (88.3%) | 434 (88.8%) | 413 (87.3%) | 293 (90.2%) | 252 (86.9%) |
Positive | 58 (11.7%) | 55 (11.2%) | 60 (12.7%) | 32 (9.8%) | 38 (13.1%) | |
Neisseria gonorrhoeae | Negative | 488 (98.4%) | 480 (98.2%) | 466 (98.5%) | 322 (99.1%) | 285 (98.3%) |
Positive | 8 (1.6%) | 9 (1.8%) | 7 (1.5%) | 3 (0.9%) | 5 (1.7%) | |
HSV-2 | Negative | 407 (82.1%) | 387 (79.1%) | 375 (79.3%) | 264 (81.2%) | 226 (77.9%) |
Positive | 88 (17.7%) | 102 (20.9%) | 98 (20.7%) | 60 (18.5%) | 64 (22.1%) | |
Indeterminate | 1 (0.2%) | 0 | 0 | 1 (0.3%) | 0 | |
BVa | Negative | 415 (83.7%) | 378 (77.3%) | 378 (79.9%) | 278 (85.5%) | 239 (82.4%) |
Positive | 81 (16.3%) | 111 (22.7%) | 95 (20.1%) | 47 (14.5%) | 51 (17.6%) | |
Trichomonas vaginalis | Negative | 477 (96.2%) | 468 (95.7%) | 452 (95.6%) | 315 (96.9%) | 275 (94.8%) |
Positive | 19 (3.8%) | 21 (4.3%) | 21 (4.4%) | 10 (3.1%) | 15 (5.2%) | |
