β2-agonists group | Control group | ||||||
---|---|---|---|---|---|---|---|
Logistic regression analysis | |||||||
n = 71 | n = 103 | Difference of means | Standard error | P-value | Effect size | Bias reduction | |
Age | 71.4 ± 7.3 | 70.7 ± 8.6 | 0.7 | 0.86 | 0.52 | 0.82 | |
VC, % predicted | 94.9 ± 14.6 | 98.0 ± 16.7 | −3.1 | 1.69 | 0.19 | 1.84 | |
FEV1, % predicted | 69.6 ± 15.1 | 79.0 ± 17.0 | −9.4 | 1.73 | <0.001 | 5.42 | |
FEV1/FVC, % | 57.9 ± 8.6 | 62.9 ± 6.8 | −5.0 | 0.85 | <0.001 | 5.92 | |
Logistic regression analysis adjusted propensity score | |||||||
n = 67 | n = 67 | ||||||
Age | 71.4 ± 7.4 | 70.5 ± 8.5 | 0.9 | 0.97 | 0.50 | 0.93 | 113.4 |
VC, % predicted | 95.7 ± 14.2 | 97.6 ± 16.9 | −1.9 | 1.90 | 0.47 | 1.00 | 54.5 |
FEV1, % predicted | 70.6 ± 14.9 | 75.0 ± 17.0 | −4.4 | 1.95 | 0.11 | 2.26 | 41.6 |
FEV1/FVC, % | 58.2 ± 8.6 | 60.2 ± 7.0 | −2.0 | 0.95 | 0.14 | 2.10 | 35.5 |
Mean of bias reduction | 61.3 |