Table 4.
Impact of ever WS exposure on SGRQ and SF-36 scores independent of current smoking, comorbidity, airway obstruction, and CMH status at baseline
| Score | Basic modela | Alternative modelb | ||
|---|---|---|---|---|
| Estimate (SE) | P | Estimate (SE) | P | |
| SGRQ | ||||
| Symptom | 8.5 (0.9) | < 0.0001 | 5.7 (0.8) | < 0.0001 |
| Activity | 8.1 (1.0) | < 0.0001 | 5.4 (0.9) | < 0.0001 |
| Impact | 5.0 (0.6) | < 0.0001 | 3.3 (0.5) | < 0.0001 |
| Total | 6.9 (0.7) | < 0.0001 | 4.6 (0.6) | < 0.0001 |
| SF-36 | ||||
| Physical functioning | − 7.0 (1.1) | < 0.0001 | − 4.6 (1.0) | < 0.0001 |
| Role physical | − 11.0 (1.6) | < 0.0001 | − 8.1 (1.6) | < 0.0001 |
| Bodily pain | − 6.9 (1.1) | < 0.0001 | − 5.6 (1.1) | < 0.0001 |
| Role emotional | − 6.2 (1.8) | 0.0005 | − 4.0 (1.8) | 0.023 |
| Social functioning | − 5.6 (1.1) | < 0.0001 | − 3.9 (1.1) | 0.0004 |
| Mental health | − 3.8 (0.9) | < 0.0001 | − 2.9 (0.9) | 0.0009 |
| Vitality | − 5.9 (1.0) | < 0.0001 | − 4.1 (1.0) | < 0.0001 |
| General health perceptions | − 6.1 (0.9) | < 0.0001 | − 3.8 (0.9) | < 0.0001 |
SF-36 the short form 36 health survey questionnaire, SGRQ St. George’s Respiratory questionnaire, WS woodsmoke
aBasic model assessed the impact of ever WS exposure on SGRQ scores using linear mixed effects model or on SF-36 scores using generalized linear model
bAlternative model added Charlson comorbidity score (≥ 1 versus 0), airway obstruction, and CMH at baseline into the basic model to assess the independent components of effects for ever WS exposure