Table 2.
Baseline characteristics of the AECOPDa and Stable groups.
| Characteristics | AECOPD group (n=35) | Stable group (n=49) | P value | |||||
| Male, n (%) | 19 (54.3) | 27 (55.1) | >.99 | |||||
| Age (years), mean (SD) | 67.6 (9.7) | 66.7 (9.2) | .77 | |||||
| BMI (kg/m2), mean (SD) | 25.2 (6.0) | 28.0 (6.7) | .04 | |||||
| Chest circumference (inches), mean (SD) | 37.9 (4.4) | 39.0 (4.0) | .29 | |||||
| Waist circumference (cm), mean (SD) | 94.0 (17.1) | 97.4 (15.2) | .39 | |||||
| Forced expiratory volume in 1 second (% predicted), mean (SD) | 44.8 (22.3) | 53.5 (27.4) | .16 | |||||
| Forced expiratory volume in 1 second–forced vital capacity ratio, mean (SD) | 0.43 (0.16) | 0.50 (0.16) | .14 | |||||
| Medical Research Council dyspnea grade, n (%) | ||||||||
|
|
2 | 8 (22.9) | 15 (30.6) | .47 | ||||
|
|
3 | 5 (14.3) | 17 (34.7) | .045 | ||||
|
|
4 | 14 (40.0) | 16 (32.7) | .499 | ||||
|
|
5 | 8 (23.8) | 1 (2.0) | .003 | ||||
| Smoking status, n (%) | ||||||||
|
|
Never | 0 | 3 (7.1)b | .81 | ||||
|
|
Ex-smoker | 23 (65.7) | 29 (69.1)b | .33 | ||||
|
|
Current | 12 (34.3) | 10 (23.8)b | .25 | ||||
| Pack years (years), median (IQR) | 48.0 (35.5-63.8) | 40.0 (27.0-50.0)c | .09 | |||||
| Oxygen use, n (%) | 4 (11.4) | 3 (7.3)d | .70 | |||||
| Hospital admissions in the last 12 months, median (IQR) | 1.5 (1.0-2.8) | 0 (0-1.0)e | <.001 | |||||
| Exacerbations in the last 12 months, median (IQR) | 3.0 (2.0-4.0) | 0.5 (0-3.0)e | .009 | |||||
| Physical activity (hours/day)f, median (IQR) | 1.3 (0.9-1.7) | 1.5 (1.1-2.0) | .03 | |||||
aAECOPD: acute exacerbation of chronic obstructive pulmonary disease.
bMissing data (n=7).
cMissing data (n=23).
dMissing data (n=8).
eMissing data (n=25).
fCalculated from the Equivital LifeMonitor.