Baseline, follow-up and change scores of the investigator-administered (IA) and self-administered (SA) version of the chronic respiratory questionnaire (CRQ)
| Domain | Visit | CRQ-IA# | CRQ-SA¶ | Difference | p-value+ |
| Individualised dyspnoea | Baseline | 3.29 (3.07–3.50) | 3.00 (2.78–3.22) | 0.29 (−0.01–0.60) | 0.06 |
| Follow-up | 3.94 (3.68–4.20) | 4.00 (3.73–4.28) | −0.06 (−0.44–0.32) | 0.74 | |
| Change | 0.65 (0.44–0.87) | 1.01 (0.76–1.26) | −0.36 (−0.68– −0.03) | 0.03 | |
| Standardised dyspnoea | Baseline | 4.29 (4.02–4.56) | 4.11 (3.86–4.37) | 0.17 (−0.19–0.54) | 0.35 |
| Follow-up | 4.82 (4.54–5.10) | 4.88 (4.61–5.15) | −0.06 (−0.45–0.32) | 0.75 | |
| Change | 0.53 (0.30–0.76) | 0.77 (0.54–1.00) | −0.24 (−0.56–0.09) | 0.15 | |
| Fatigue | Baseline | 4.04 (3.73–4.35) | 3.85 (3.62–4.08) | 0.19 (−0.19–0.58) | 0.32 |
| Follow-up | 4.33 (4.02–4.63) | 4.48 (4.24–4.73) | −0.16 (−0.54–0.23) | 0.43 | |
| Change | 0.28 (0.04–0.53) | 0.63 (0.41–0.86) | −0.35 (−0.68– −0.02) | 0.04 | |
| Emotional function | Baseline | 4.86 (4.58–5.14) | 4.71 (4.48–4.94) | 0.15 (−0.21–0.50) | 0.41 |
| Follow-up | 5.07 (4.82–5.33) | 5.21 (4.98–5.43) | −0.13 (−0.47–0.20) | 0.43 | |
| Change | 0.22 (0.02–0.42) | 0.50 (0.31–0.69) | −0.28 (−0.55– −0.01) | 0.04 | |
| Mastery | Baseline | 5.03 (4.76–5.29) | 4.60 (4.34–4.87) | 0.42 (0.05, 0.80) | 0.03 |
| Follow-up | 5.37 (5.11–5.64) | 5.33 (5.07–5.59) | 0.04 (−0.33–0.41) | 0.82 | |
| Change | 0.34 (0.15–0.54) | 0.72 (0.51–0.94) | −0.38 (−0.67– −0.09) | 0.01 |
Data are presented as mean (95% confidence interval) unless otherwise stated. #: n = 86; ¶: n = 91; +: p-values from unpaired t-tests for independent samples comparing the CRQ-IA with the CRQ-SA.