From: Is generalization of exhaled CO assessment in primary care helpful for early diagnosis of COPD?
Variable | All | Without eCO assessment | With eCO assessment | P-value |
---|---|---|---|---|
(n = 410) | (n = 194) | (n = 216) | ||
Female (%) | 216 (53.3) | 103 (53.9) | 113 (52.8) | .875c |
Age (years) | 60.6 ± 16.2 | 61.8 ± 15.8 | 59.5 ± 16.5 | .144t |
Smoking status | .095c | |||
Current smokers (%) | 96 (23.4) | 37 (19.1) | 59 (27.3) | |
Former smokers (%) | 130 (31.7) | 61 (31.4) | 69 (31.9) | |
Never smokers (%) | 184 (44.9) | 96 (49.5) | 88 (40.7) | |
Pack-years | 22.4 ± 15.9 | 22.4 ± 16.6 | 22.3 ± 15.6 | .918m |
Exhaled CO (ppm) | 3.88 ± 7.01 | NA | 3.88 ± 7.01 | NA |