Table 2.
Mean scores, significance of change (t-test) and ESs from baseline to the 28-week follow-up.a
| Health status measure | Mean at baseline (SD) | Mean at follow-up (28 weeks) | Mean change | SEM | ES | t | |
|---|---|---|---|---|---|---|---|
| SGRQ total score | Total sample | 43.40 (14.88) | 25.63 (15.42) | 17.77 (15.96) | 2.28 | 0.75 | 7.79b (48) |
| mMRC 1–2 | 38.09 (13.18) | 19.58 (12.26) | 18.51 (13.66) | 2.54 | 0.66 | 7.30b (28) | |
| mMRC 3–4 | 51.10 (14.07) | 28.30 (16.45) | 22.80 (13.96) | 3.12 | 0.74 | 7.30b (19) | |
| SGRQ activity score | Total sample | 58.03 (18.97) | 37.48 (19.63) | 20.54 (22.45) | 3.21 | 0.68 | 6.41b (48) |
| mMRC 1–2 | 50.75 (16.28) | 29.34 (18.41) | 21.41 (23.34) | 4.33 | 0.68 | 4.94b (28) | |
| mMRC 3–4 | 68.57 (17.89) | 43.68 (20.49) | 24.89 (19.45) | 4.35 | 0.79 | 5.72b (19) | |
| SGRQ impact score | Total sample | 35.65 (17.81) | 18.18 (14.35) | 17.47 (17.62) | 2.52 | 0.71 | 6.94b (48) |
| mMRC 1–2 | 29.92 (14.63) | 12.92 (10.04) | 17.00 (12.69) | 2.36 | 0.81 | 7.22b (28) | |
| mMRC 3–4 | 43.96 (19.06) | 18.82 (15.93) | 25.14 (17.63) | 3.94 | 0.83 | 6.38b (19) | |
| SGRQ symptom score | Total sample | 45.76 (18.92) | 28.56 (18.88) | 17.20 (20.75) | 2.96 | 0.64 | 5.80b (48) |
| mMRC 1–2 | 41.93 (21.34) | 23.90 (19.10) | 18.03 (20.93) | 3.89 | 0.66 | 4.64b (28) | |
| mMRC 3–4 | 51.32 (13.35) | 30.85 (18.55) | 20.47 (17.48) | 3.908 | 0.77 | 5.24b (19) | |
| CAT total score | Total sample | 13.52 (8.61) | 5.24 (5.79) | 8.29 (7.99) | 1.23 | 0.74 | 6.71b (41) |
| mMRC 1–2 | 11.38 (6.15) | 4.28 (4.54) | 7.10 (7.00) | 1.30 | 0.72 | 5.46b (28) | |
| mMRC 3–4 | 17.55 (10.99) | 8.30 (8.08) | 9.25 (9.51) | 2.13 | 0.71 | 4.35b (19) | |
SD: standard deviation; PR: pulmonary rehabilitation; ES: effect size; df: degrees of freedom; SEM: standard mean error; t: t-statistic value; SGRQ: St. George’s Respiratory Questionnaire; mMRC: modified Medical Research Council; CAT: chronic obstructive pulmonary disease assessment test.
aSeverity of dyspnoea category: mild to moderate cases (mMRC 1–2) and severe to very severe cases (mMRC 3–4).
bSignificant at <0.001 level (one tailed).