Unadjusted primary nonadherence prevalence by primary care provider, patient and medication characteristics in British Columbia
| Characteristic | No. (%) of all new prescriptions n = 150 565 | No. of new prescriptions unfilled n = 25 649 | Frequency of primary nonadherence (%) |
|---|---|---|---|
| Primary care providers | |||
| Sex | |||
| Female | 69 879 (46.4) | 13 490 | 19.3 |
| Male | 80 686 (53.6) | 12 159 | 15.1 |
| Age group, yr | |||
| ≤ 35 | 14 015 (9.3) | 2395 | 17.1 |
| 36–54 | 57 652 (38.3) | 10 313 | 17.9 |
| ≥ 55 | 26 688 (17.7) | 4754 | 17.8 |
| Missing | 52 210 (34.7) | 8187 | 15.7 |
| Patients | |||
| Sex | |||
| Female | 95 852 (63.7) | 16 657 | 17.4 |
| Male | 54 403 (36.1) | 8946 | 16.4 |
| Unknown | 310 (0.2) | 46 | 14.8 |
| Age group, yr | |||
| ≤ 18 | 11 854 (7.8) | 3255 | 27.5 |
| 19–44 | 40 016 (26.6) | 8095 | 20.2 |
| 45–64 | 47 044 (31.2) | 7350 | 15.6 |
| ≥ 65 | 51 651 (34.3) | 6949 | 13.5 |
| Neighbourhood income quintile | |||
| 1 (lowest income quintile) | 22 347 (14.8) | 4005 | 17.9 |
| 2 | 31 113 (20.7) | 5293 | 17 |
| 3 | 31 019 (20.6) | 5125 | 16.5 |
| 4 | 32 214 (21.4) | 5556 | 17.3 |
| 5 (highest income quintile) | 32 744 (21.8) | 5417 | 16.5 |
| Missing or NA | 1128 (0.7) | 253 | 22.4 |
| Health authority | |||
| Interior | 27 463 (18.2) | 3653 | 13.3 |
| Fraser | 65 287 (43.4) | 11 328 | 17.4 |
| Vancouver Coastal | 49 433 (32.8) | 9448 | 19.1 |
| Vancouver Island | 7961 (5.3) | 1139 | 14.3 |
| Northern | 294 (0.2) | 56 | 19.1 |
| Missing or NA | 127 (0.1) | 25 | 19.7 |
| No. of medications prescribed in the past 12 months | |||
| 0 | 62 715 (41.7) | 10 933 | 17.4 |
| 1–3 | 46 960 (29.9) | 7800 | 17.4 |
| 4–6 | 16 701 (11.1) | 2750 | 16.5 |
| ≥ 7 | 26 189 (17.4) | 4166 | 15.9 |
| Drug therapeutic category | |||
| Alimentary tract | 11 663 (7.8) | 2041 | 17.5 |
| Cardiovascular | 19 405 (12.9) | 1758 | 9.1 |
| Dermatological | 14 334 (9.5) | 3872 | 27.0 |
| Genitourinary and sex hormones | 12 937 (8.6) | 2154 | 16.7 |
| Anti-infectives | 22 633 (15.0) | 4947 | 21.9 |
| Central nervous system | 28 662 (19.0) | 3745 | 13.1 |
| Respiratory system | 18 196 (12.1) | 3363 | 18.5 |
| Other* | 22 735 (15.1) | 3763 | 16.5 |
Note: NA = not applicable.
↵* Blood agents, hormones, antineoplastics, musculoskeletal, antiparasitic, sensory organs and various categories.