MRC Grade | Mean change (SD) ISWT (m) | 95% C.I | Sig. (2 tailed) | FEV1 (litres) (SD) | FVC (litres) (SD) | BMI (SD) |
1 n=8 | 11.25 (45.49) | −26.78 to 49.28 | 507 | 1.38 (0.41) | 2.39 (0.57) | 27.90 (6.05) |
2 n=88 | 29.54 (46.11) | 19.77 to 39.31 | <0.0001 | 1.43 (0.57) | 2.62 (0.67) | 26.30 (5.50) |
3 n=142 | 23.88 (44.98) | 15.91 to 30.84 | <0.0001 | 1.39 (0.56) | 2.46 (0.74) | 28.60 (5.90) |
4 n=128 | 14.37 (34.70) | 8.30 to 20.44 | <0.0001 | 1.15 (0.55) | 2.34 (0.94) | 27.61 (6.69) |
5 n=75 | 8.54 (29.75) | 1.70 to 15.39 | 0.015 | 0.99 (0.44) | 2.08 (0.58) | 27.90 (7.83) |
Overall change n=441 | 19.25 (40.65) | 15.44 to 23.05 | <0.0001 | 0 | 0 | 0 |