Table 1.
COPD cohort patient characteristics
| All patients (113) | Iron deficient (20) | Iron replete (81) | Statistical comparison | |
|---|---|---|---|---|
| Male sex; n (%) | 74 (65) | 12 (60) | 53 (66) | χ2 (p=0.793) |
| Age, years; mean (SD) | 67.6 (8.77) | 67.5 (9.86) | 67.5 (8.47) | t test (p=0.980) |
| FEV1, % predicted; mean (SD) | 43.8 (17.1) | 39.7 (16.5) | 44.8 (17.0) | t test (p=0.236) |
| Current smoker; n (%) | 17 (15) | 4 (20) | 11 (13.6) | χ2 (p=0.710) |
| Pack years; median (IQR) | 44.0 (28.5–62.0) | 44.0 (37.0–67.0) | 45.0 (27.8–62.8) | MWU test (p=0.799) |
| BMI, kg/m2; median (IQR) | 27.6 (21.7–30.3) | 27.8 (21.6–31.9) | 27.5 (21.7–30.6) | MWU test (p=0.855) |
| Long-term oxygen therapy; n (%) | 5 (4) | 2 (10) | 3 (4) | χ2 (p=0.531) |
| Any home oxygen therapy; n (%) | 14 (12) | 5 (25) | 8 (10) | χ2 (p=0.151) |
BMI, body mass index; COPD, chronic obstructive pulmonary disease; FEV, forced expiratory volume in 1 s; MWU, Mann-Whitney U.