No osteoporosisversus osteoporosis in patients with chronic obstructive pulmonary disease
| No osteoporosis | Osteoporosis | p-value | |
| Age yrs | 63.4±4.1 (503) | 63.4±6.7 (272) | 0.917 |
| Sex M/F % (n) | 77/23 (336) | 63/37 (233) | <0.001** |
| FEV1 % pred | 47.5±12.0 (369) | 41.1±15.8 (145) | <0.001** |
| BMI kg·m−2 | 25.5±2.1 (471) | 23.7±2.3 (250) | <0.001** |
| FFMI kg·m−2 | 16.9±0.7 (235) | 16.2±1.1 (76) | <0.001** |
Data are presented as mean±sd (n), unless otherwise indicated. M: males; F: females; FEV1: forced expiratory volume in 1 s; BMI: body mass index; FFMI: fat-free mass index. **: significant at p<0.01.