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Frequency of vitamin D deficiency
| Vitamin D (nmol/l) | Group 1 (COPD cohort), n (%) | Group 2 (HV), n (%) | Total, n (%) |
|---|---|---|---|
| <70 | 48 (96.0) | 27 (90.0) | 75 (93.8) |
| ≥70 | 2 (4.0) | 3 (10.0) | 5 (6.2) |
| Total | 50 (100.0) | 30 (100.0) | 80 (100.0) |
COPD: Chronic obstructive pulmonary disease, HV: Healthy volunteer
