Table 2 Summary scores, internal consistency and concurrent validity of SGRQ-Ider
From: Validation of a derived version of the IPF-specific Saint George’s Respiratory Questionnaire
SGRQ-Ider | SGRQ-Ider Mean (SD) | SGRQ-I Mean (SD) | Difference (95% CI) | Cronbach’s α | ICC |
|---|---|---|---|---|---|
Total | 43.3 (21.5) | 43.4 (22.1) | 0.03 (− 0.45 to 0.51) | 0.92 | 0.99 |
Symptoms | 49.8 (22.9) | 49.6 (27.1) | − 0.10 (− 2.74 to 2.53) | 0.74 | 0.80 |
Activities | 61.5 (28.3) | 61.5 (28.3) | 0.03 (0.02 to 0.03) | 0.86 | 1.00 |
Impacts | 32.0 (22.3) | 31.9 (22.3) | 0.12 (− 0.07 to 0.31) | 0.84 | 1.00 |