Demographic characteristics, laboratory site and vaccination dose of cases and controls
| Category | No. (%) screened women | p value | No. (%) screened women | ||
|---|---|---|---|---|---|
| Controls n = 8723 | Cases n = 1481 | Low grade* n = 1384 | High grade† n = 97 | ||
| Age, yr‡ | |||||
| 18 | 458 (5.3) | 55 (3.7) | 0.046 | 52 (3.8) | 3 (3.1) |
| 19 | 1729 (19.8) | 237 (16.0) | 226 (16.3) | 11 (11.3) | |
| 20 | 3318 (38.0) | 576 (38.9) | 535 (38.7) | 41 (42.3) | |
| 21 | 3218 (36.9) | 613 (41.4) | 571 (41.3) | 42 (43.3) | |
| Neighbourhood income quintile | |||||
| 1 (lowest) | 1597 (18.3) | 284 (19.2) | 0.4 | 258 (18.6) | 26 (26.8) |
| 2 | 1811 (20.8) | 282 (19.0) | 261 (18.9) | 21 (21.6) | |
| 3 | 1597 (18.3) | 252 (17.0) | 234 (16.9) | 18 (18.6) | |
| 4 | 1826 (20.9) | 336 (22.7) | 320 (23.1) | 16 (16.5) | |
| 5 (highest) | 1865 (21.4) | 324 (21.9) | 308 (22.3) | 16 (16.5) | |
| Missing | 27 (0.3) | 3 (0.2) | 3 (0.2) | 0 (0.0) | |
| Residential address | |||||
| Rural | 2473 (28.4) | 400 (27.0) | 0.3 | 380 (27.5) | 20 (20.6) |
| Urban | 6223 (71.3) | 1078 (72.8) | 1001 (72.3) | 77 (79.4) | |
| Missing | 27 (0.3) | 3 (0.2) | 3 (0.2) | 0 (0.0) | |
| Laboratory services | |||||
| Laboratory 1§ | 3179 (36.4) | 768 (51.9) | < 0.001 | 708 (51.2) | 60 (61.9) |
| Laboratory 2¶ | 5544 (63.6) | 713 (48.1) | 676 (48.8) | 37 (38.1) | |
| Vaccination dose | |||||
| 0 | 4794 (55.0) | 918 (62.0) | 846 (61.1) | 72 (74.2) | |
| 1 | 280 (3.2) | 47 (3.2) | 45 (3.3) | 2 (2.1) | |
| 2 | 407 (4.7) | 83 (5.6) | 82 (5.9) | 1 (1.0) | |
| ≥ 3 | 3242 (37.2) | 433 (29.2) | 411 (29.7) | 22 (22.7) | |
↵* Low-grade cases: atypical squamous cells of undetermined significance or low-grade squamous intraepithelial lesion.
↵† High-grade cases: atypical squamous cells, cannot rule out a high-grade lesion; or high-grade squamous intraepithelial lesion.
↵‡ Age when Pap test (worst result between Jan. 1, 2012, and Aug. 14, 2015) was performed.
↵§ Laboratory in Calgary.
↵¶ Laboratory in Edmonton.