Women’s demographics and characteristics according to adherence of oral contraceptives
| Demographic/characteristic | Oral contraceptives medication possession ratio (MPR)* | P value | ||
| Non-adherent (<90%) | Adherent (>90%) | All | ||
| (n=70 742 (86%)) | (n=11 517 (14%)) | (n=82 259) | ||
| Age at initiation of first OC | 19.2±0.6 | 19.2±0.5 | 19.2±0.6 | 0.306 |
| Body mass index (kg/m2) | 21.2±3.6 | 21.0±3.5 | 21.2±3.6 | <0.001 |
| Paternal country of origin | <0.001 | |||
| Israel | 8709 (12.3%) | 1131 (9.8%) | 9840 (12.0%) | |
| Western | 15 840 (22.4%) | 2687 (23.3%) | 18 527 (22.6%) | |
| Sub-Saharan Africa | 1185 (1.7%) | 129 (1.1%) | 1314 (1.6%) | |
| Asia | 13 126 (18.6%) | 2446 (21.2%) | 15 572 (19.0%) | |
| Former Soviet Union | 14 829 (21.0%) | 2441 (21.2%) | 17 270 (21.0%) | |
| North Africa | 16 565 (23.5%) | 2622 (22.8%) | 19 187 (23.4%) | |
| Other | 328 (0.5%) | 55 (0.5%) | 383 (0.5%) | |
| Immigration status | 0.15 | |||
| First-generation immigrant | 12 432 (17.6%) | 1917 (16.6%) | 14 349 (17.4%) | |
| Education | <0.001 | |||
| Less than high school | 1310 (1.9%) | 112 (1.0%) | 1422 (1.7%) | |
| High school graduate | 69 061 (97.6%) | 11 306 (98.1%) | 80 367 (97.7%) | |
| Higher education | 371 (0.5%) | 99 (0.9%) | 470 (0.6%) | |
| IQ score | <0.001 | |||
| Low (90–99) | 22 934 (32.4%) | 3156 (27.4%) | 26 090 (31.7%) | |
| Medium (100–117) | 41 482 (58.7%) | 7144 (62.0%) | 48 626 (59.1%) | |
| High (≥118) | 6304 (8.9%) | 1217 (10.6%) | 7521 (9.1%) | |
| Neighbourhood socioeconomic status | <0.001 | |||
| Low (1–4) | 14 431 (20.4%) | 2223 (19.3%) | 16, 863 (20.5%) | |
| Medium (5–7) | 39 474 (55.8%) | 6680 (58.0%) | 45 901 (55.8%) | |
| High (8–10) | 16 837 (23.8%) | 2614 (22.7%) | 19 495 (23.7%) | |
| Type of service | <0.001 | |||
| Combat | 1013 (1.4%) | 82 (0.7%) | 1095 (1.3%) | |
| Combat-support | 7437 (10.5%) | 836 (7.3%) | 8273 (10.1%) | |
| Non-combat | 32 292 (88.1%) | 10 599 (92.0%) | 72 891 (88.6%) | |
| Medical score | <0.001 | |||
| Low | 18 705 (26.5%) | 3410 (29.7%) | 22 115 (26.9%) | |
| Stable | 12 783 (18.1%) | 1952 (17.0%) | 14 735 (18.0%) | |
| Healthy | 39 088 (55.4%) | 6136 (53.3%) | 45 224 (55.1%) | |
| History of mental illness | 853 (1.2%) | 129 (1.1%) | 982 (1.2%) | 0.458 |
*The oral contraceptive medication possession ratio (MPR) was divided into two groups: non-adherent (MPR <90%) and adherent (MPR >90%), which represent the possession of 1–10 OC packages and 11–12 OC packages, respectively.
OC, oral contraceptive.