Patient characteristics by quartile of serum 25-hydroxyvitamin D
| Serum 25-hydroxyvitamin D quartile | |||||
| Q1 (10–44 nmol/L) | Q2 (45–64 nmol/L) | Q3 (65–87 nmol/L) | Q4 (88–658 nmol/L) | P for linear trend | |
| N | 18 053 | 18 022 | 18 056 | 18 040 | |
| Serum 25-hydroxyvitamin D, median, mean (SD) | 33, 31 (8.5) | 55, 55, (5.8) | 75, 75 (6.4) | 105, 114 (29.6) | |
| Age, years, mean (SD) | 48 (15) | 51 (15) | 54 (15) | 58 (15) | <0.001 |
| % Male, (n) | 56.3 (10 166) | 51.4 (9261) | 45.4 (8199) | 40.1 (7218) | <0.001 |
| BMI, kg/m2, mean (SD) | 27.4 (5.3) | 27.3 (5.1) | 26.9 (5.1) | 26.1 (4.8) | <0.001 |
| Daylight hours during month of testing, mean (SD) | 11.9 (2.9) | 12.2 (2.9) | 12.4 (2.9) | 12.5 (2.9) | <0.001 |
| Census dissemination area-level measures of socioeconomic status | |||||
| Canadian citizens, mean % (SD) | 88.1 (10.1) | 89.8 (8.9) | 91.0 (8.1) | 91.9 (7.5) | <0.001 |
| Recent immigrants, mean % (SD) | 33.4 (16.8) | 30.0 (16.2) | 27.4 (15.1) | 25.2 (13.8) | <0.001 |
| Visible minorities, mean % (SD) | 38.5 (26.0) | 32.4 (24.9) | 27.8 (22.6) | 23.6 (19.9) | <0.001 |
| Do not speak official language (English or French) at home, mean % (SD) | 39.4 (22.1) | 34.5 (21.1) | 31.0 (19.6) | 27.7 (17.3) | <0.001 |
| Aboriginal identity, mean % (SD) | 2.5 (5.7) | 2.2 (4.4) | 2.1 (4.2) | 2.0 (4.1) | <0.001 |
| Postsecondary education, mean % (SD) | 54.8 (14.0) | 56.9 (13.6) | 58.7 (13.5) | 60.2 (12.9) | <0.001 |
| Employed, mean % (SD) | 93.3 (5.7) | 93.5 (5.8) | 93.7 (5.5) | 93.9 (5.2) | <0.001 |
| Household total income, CDN$, median (SD) | 85 434 (32 435) | 90 779 (35 727) | 944 486 (38 827) | 96 986 (41 439) | <0.001 |
| All cancer, n | 615 | 737 | 928 | 1159 | <0.001 |
| Major cancer, n | 264 | 381 | 470 | 604 | <0.001 |
| Breast cancer, n | 83 | 125 | 127 | 183 | <0.001 |
| Colorectal cancer, n | 57 | 68 | 91 | 101 | <0.001 |
| Lung cancer, n | 30 | 44 | 57 | 61 | <0.001 |
| Prostate cancer, n | 63 | 80 | 77 | 110 | <0.001 |
| Skin cancer, n (non-melanoma/melanoma) | 31 (5/26) | 64 (15/49) | 118 (17/101) | 149 (21/128) | <0.001 |
| Other cancer, n | 351 | 356 | 458 | 555 | <0.001 |
There were 2849 census dissemination areas.
BMI, body mass index.