Variables | PhA | FFMI | ||||
Normal (n=73) | Low (n=25) | P value | Normal (n=89) | Low (n=9) | P value | |
Sex (male), n (%) | 62 (85) | 22 (88) | 0.70 | 76 (85) | 8 (89) | 0.77 |
Age (years) | 69±4 | 66±10 | 0.28 | 68±8 | 71±5 | 0.21 |
BMI (kg/m2) | 26.3±4.3 | 27.4±4.3 | 0.31 | 27.0±4.1 | 23.3±5.0 | 0.01 |
FFMI (kg/m²) | 19.8±2.7 | 19.9±2.5 | 0.87 | 20.1±2.5 | 16.7±2.2 | <0.01 |
FMI (kg/m²) | 6.5±2.5 | 7.4±3.0 | 0.14 | 6.8±2.6 | 5.7±3.1 | 0.23 |
Body cell mass (kg) | 29±7 | 27±6 | 0.10 | 29±6 | 23±6 | <0.01 |
Extracellular mass (kg) | 30±5 | 36±6 | <0.01 | 32±6 | 29±7 | 0.14 |
Body water (L) | 44±8 | 46±8 | 0.27 | 45±8 | 38±8 | 0.01 |
Intracellular water (L) | 26±4 | 26±3 | 0.67 | 26±3 | 23±10 | 0.02 |
Extracellular water (L) | 18±4 | 20±4 | 0.11 | 19±4 | 15±5 | 0.01 |
Phase angle (°) | 5.5±0.7 | 4.4±0.7 | <0.01 | 5.3±0.8 | 4.7±1.0 | 0.05 |
Pack years | 13(8-34) | 40(15-50) | 0.02 | 20(9-40) | 30(10-50) | 0.25 |
FVC (%predicted) | 67±19 | 55±13 | <0.01 | 65±19 | 58±12 | 0.25 |
FEV1 (%predicted) | 75±20 | 63±14 | <0.01 | 73±20 | 67±14 | 0.50 |
TLC (%predicted) | 72±14 | 66±13 | 0.05 | 71±14 | 66±14 | 0.45 |
RV (%predicted) | 85±20 | 89±24 | 0.44 | 86±21 | 86±21 | 0.97 |
DLCO (%predicted) | 32±16 | 26±14 | 0.14 | 31±15 | 27±18 | 0.69 |
PaO2 (mm Hg) | 69±11 | 60±12 | <0.01 | 67±11 | 61±13 | 0.15 |
PaCO2 (mm Hg) | 37±4 | 36±5 | 0.80 | 37±4 | 37±4 | 0.99 |
LTOT, n (%) | 36 (49) | 19 (76) | 0.02 | 49 (55) | 6 (67) | 0.50 |
CRP (mg/dL) | 5 (3–10) | 8 (5–18) | 0.03 | 6 (3–13) | 6 (3–25) | 0.93 |
6MWD (m) | 407±109 | 312±103 | <0.01 | 387±114 | 344±117 | 0.28 |
6MWD (%predicted) | 73±19 | 54±17 | <0.01 | 69±20 | 61±21 | 0.23 |
SF-36 Physical Summary Score | 39±9 | 33±8 | <0.01 | 37±10 | 38±7 | 0.80 |
SF-36 Mental Summary Score | 44±14 | 41±14 | 0.47 | 43±14 | 44±14 | 0.95 |
Data expressed as frequency, mean±SD or median (IQR 25%–75%).
BMI, body mass index; CRP, C reactive protein; DLCO, diffusion capacity for carbon monoxide; FEV1, forced expiratory volume in the first second; FMI, fat mass index; FVC, forced vital capacity; LTOT, long-term oxygen therapy; 6MWD, 6 min walk distance; PaCO2, arterial carbon dioxide tension; PaO2, arterial oxygen tension; RV, residual volume; SF-36, Short-Form 36-item Questionnaire; TLC, total lung capacity.