Table 1 Sociodemographic characteristics of the study population
General population cohort | Exposed cohort | |||
|---|---|---|---|---|
Non-surgical | Surgically treated once | Surgically treated ≥ 2 | ||
n = 199 321 | n = 17 853 | n = 1645 | n = 436 | |
Sex | ||||
Female | 144 542 (73%) | 12 817 (72%) | 1277 (78%) | 362 (83%) |
Male | 54 779 (27%) | 5036 (28%) | 368 (22%) | 74 (17%) |
Educational level | ||||
Primary/lower secondary school | 23 555 (12%) | 2330 (13%) | 212 (13%) | 61 (14%) |
Upper secondary school | 84 940 (43%) | 8003 (45%) | 771 (47%) | 215 (49%) |
Post-secondary school | 88 504 (44%) | 7393 (41%) | 659 (40%) | 159 (37%) |
Data unavailable | 2322 (1%) | 127 (1%) | 3 (< 1%) | 1 (< 1%) |
Country of birth | ||||
Sweden | 154 467 (78%) | 12 845 (72%) | 1391 (85%) | 383 (88%) |
Other Nordic countries | 5558 (3%) | 465 (3%) | 59 (4%) | 16 (4%) |
Other European countries | 16 120 (8%) | 1512 (8%) | 61 (4%) | 14 (3%) |
Non-European countries | 23 153 (12%) | 3030 (17%) | 134 (8%) | 23 (5%) |
Data unavailable | 23 (< 1%) | 1 (< 1%) | 0 (0%) | 0 (0%) |
Degree of urbanisation | ||||
Cities | 96 433 (48%) | 8319 (47%) | 878 (53%) | 218 (50%) |
Towns and suburbs | 51 885 (26%) | 5210 (29%) | 391 (24%) | 120 (28%) |
Rural areas | 50 044 (25%) | 4283 (24%) | 372 (23%) | 97 (22%) |
Data unavailable | 959 (< 1%) | 41 (< 1%) | 4 (< 1%) | 1 (< 1%) |
Age | ||||
Mean | 41.63 | 41.87 | 39.69 | 39.36 |
IQR 25 | 33 | 33 | 30 | 31 |
Median | 42 | 42 | 39 | 38 |
IQR 75 | 51 | 51 | 49 | 48 |
Range | 23–59 | 23–59 | 23–59 | 23–59 |
Marital status | ||||
Married | 86 937 (44%) | 8128 (46%) | 653 (40%) | 196 (45%) |
Not married | 82 317 (41%) | 6886 (39%) | 746 (45%) | 187 (43%) |
Divorced | 27 038 (14%) | 2629 (15%) | 228 (14%) | 48 (11%) |
Widow/widower | 1869 (1%) | 145 (1%) | 11 (1%) | 3 (1%) |
Othera | 201 (< 1%) | 24 (< 1%) | 3 (< 1%) | 1 (< 1%) |
Data unavailable | 959 (< 1%) | 41 (< 1%) | 4 (< 1%) | 1 (< 1%) |