Baseline patient characteristics and serum vitamin D levels in oncology patients and non-cancer primary care patients
| Oncology | Primary care | p Value | OR (95% CI)* | |
| Sample size (n) | 170 | 170 | – | – |
| Age (±SD), years | 63.3 (±14.8) | 56.5 (±16.3) | <0.001 | – |
| BMI (±SD), kg/m2 | 29.3 (±7.1)† | 28.9 (±5.8) | 0.637 | – |
| Blood drawn in summer months, count (%) | 44 (25.9) | 31 (18.2) | 0.089 | – |
| Vitamin D levels | ||||
| Mean (SD), ng/ml | 24.9 (11.4) | 30.6 (12.5) | <0.001‡ | – |
| Adjusted mean difference, ng/ml | 5.4 | 0.001§ | – | |
| Patients <30 ng/ml, count (%) | 126 (74) | 94 (55) | 0.008* | 2.04 (1.20 to 3.46) |
| Patients <20 ng/ml, count (%) | 56 (33) | 29 (17) | 0.002* | 2.59 (1.44 to 4.67) |