Scores and reliability of the Chinese version of Severe Respiratory Insufficiency (SRI) questionnaire
| Scale | Item | Minimum score, n (%) | Maximum score, n (%) | Mean±SD | Cronbach's α |
| SRI-RC | 8 | 0 | 0 | 53.33±15.19 | 0.74 |
| SRI-PF | 6 | 0 | 1 (0.7) | 44.23±20.56 | 0.80 |
| SRI-AS | 7 | 0 | 1 (0.7) | 62.81±16.85 | 0.71 |
| SRI-SR | 6 | 0 | 5 (3.4) | 58.29±20.25 | 0.83 |
| SRI-AX | 5 | 2 (1.3) | 3 (2.0) | 51.09±23.24 | 0.88 |
| SRI-WB | 9 | 0 | 2 (1.3) | 57.23±20.08 | 0.92 |
| SRI-SF | 8 | 2 (1.3) | 1 (0.7) | 43.56±21.61 | 0.88 |
| SRI-SS | 7 scales | 0 | 0 | 52.93±15.11 | 0.95 |
SRI-AX, anxiety; SRI-AS, attendant symptoms and sleep; SRI-PF, physical functioning; SRI-RC, respiratory complaints; SRI-SF, social functioning; SRI-SR, social relationships; SRI-SS, summary scale; SRI-WB, psychological well-being.