Cohort characteristics for eligible periodic health examinations based on routine chest x-ray status, n = 2 847 508
| Characteristic* | No. (%) with CXR n = 68 848 | No. (%) without CXR n = 2 778 660 |
|---|---|---|
| Patient level | ||
| Age, yr | ||
| Mean (95% CI) | 46.4 (46.3–46.5) | 42.1 (42.1–42.1) |
| 18–44 | 29 542 (42.9) | 1 585 698 (57.1) |
| 45–64 | 32 771 (47.6) | 1 023 450 (36.8) |
| ≥ 65 | 6535 (9.5) | 169 512 (6.1) |
| Sex | ||
| Female | 26 198 (38.1) | 1 735 658 (62.5) |
| Male | 42 650 (61.9) | 1 043 002 (37.5) |
| Rurality | ||
| Rural | 3775 (5.5) | 212 201 (7.6) |
| Non-rural | 65 073 (94.5) | 2 566 459 (92.4) |
| Neighbourhood income quintile | ||
| 1 (lowest) | 13 498 (19.6) | 414 265 (14.9) |
| 2 | 15 209 (22.1) | 502 926 (18.1) |
| 3 | 13 844 (20.1) | 560 390 (20.2) |
| 4 | 14 247 (20.7) | 642 577 (23.1) |
| 5 (highest) | 12 050 (17.5) | 658 502 (23.7) |
| Hospital admission — past 5 yr | 4486 (6.5) | 312 444 (11.2) |
| Mental health care — past yr | 7012 (10.2) | 339 760 (12.2) |
| Dementia — past 5 yr | 284 (0.4) | 8920 (0.3) |
| Rheumatologic disease — past 5 yr | 3449 (5.0) | 116 576 (4.2) |
| Rostered to primary care physician† | ||
| Yes | 68 822 (> 99.9) | 2777 436 (> 99.9) |
| No | 26 (< 0.1) | 1224 (< 0.1) |
| Physician level‡ | ||
| Sex | ||
| Female | 15 952 (23.2) | 1 243 246 (44.9) |
| Male | 52 678 (76.8) | 1 526 081 (55.1) |
| IMG | 22 689 (33.1) | 824 840 (29.8) |
| Years since graduation, mean (95% CI) | 28.8 (28.7–28.9) | 24.2 (24.2–24.2) |
| Practice level | ||
| Primary care practice model§ | ||
| Fee-for-service | 13 891 (20.2) | 422 355 (15.3) |
| Family health group | 29 594 (43.1) | 995 071 (35.9) |
| Family health network | 110 (0.2) | 8548 (0.3) |
| Family health organization | 10 709 (15.6) | 656 365 (23.7) |
| Family health team | 8371 (12.2) | 558 228 (20.2) |
| Other | 5955 (8.7) | 128 760 (4.6) |
Note: CI = confidence interval, CXR = chest x-ray, IMG = international medical graduate.
↵* For all characteristics (except rostered to primary care physician), p < 0.001 across groups defined by post-physcial health examination CXR receipt status. p values not adjusted for potential intra-practice correlation.
↵† Variable indicates whether patients were rostered to a primary care physician at study entry.
↵‡ Provider-level variables only available for those index events involving a patient rostered to a primary care physician with a reported physician number for linkage (n = 2 837 957).
↵§ Represents the primary care patient enrollment model that informs practice organization and remuneration.