Table 3.
—Relationship Between FEV1 % Predicted and HRQL Score Varies by Chronic Lung Disease Diagnosis
| Outcome | Diagnosis | Adjusted β Estimate for FEV1 % Predicteda | 95% CI | P Value for Interaction Term |
| Total SGRQ | ILD | − 0.34 | − 0.44 to − 0.24 | .003 |
| COPD | − 0.50 | − 0.56 to − 0.44 | … | |
| SF-12 PCS | ILD | 0.13 | 0.08 to 0.18 | .03 |
| COPD | 0.20 | 0.16 to 0.23 | … |
HRQL = health-related quality of life; PCS = physical component summary. See Table 1 for expansion of other abbreviations.
a
Regression coefficient estimates are adjusted for age, BMI, sex, race, requirement for supplemental oxygen, and comorbidities, including angina, congestive heart failure, diabetes, renal failure, cancer diagnosis, and rheumatologic disease.