Table 4.
Multiple linear regression model to evaluate predictors for total SGRQ after three years follow-up (n = 95)
| Final total SGRQ (%) | Dependent variables | Coefficient (95% CI) | p-value |
|---|---|---|---|
| Male | -0.14 (-6.69, 6.40) | 0.965 | |
| Age (y) | -0.16 (-0.67, 0.34) | 0.525 | |
| Smoking | 3.05 (-4.28, 10.39) | 0.410 | |
| SpO2 (%) | -0.27 (-0.89, 0.35) | 0.389 | |
| FEV1 (%) | -0.14 (-0.28, -0.01) | 0.043 | |
| 6MWD (m) | 0.01 (-0.02, 0.05) | 0.433 | |
| BMI (kg/m2) | 0.27 (-0.26, 0.79) | 0.315 | |
| MMRC (score) | 9.99 (6.68, 13.30) | < 0.001 | |
| Charlson index (score) | -0.19 (-2.84, 2.45) | 0.883 | |
| Number of exacerbations | 1.29 (0.11, 2.47) | 0.031 |
SpO2: pulse oximetry; FEV1: forced expiratory volume in the first second (% of predicted); 6MWD: six-minute walking distance; BMI: body mass index; MRC: Modified Medical Research Council; R2 = 0.63; p < 0.05.