Table 5.

Minimal important difference (MID) estimates for CSRG patients.

Anchor: Change in Health over Past YearPCS Change, mean (SD) [95% CI]MCS Change, mean (SD) [95% CI]
Much better (n = 15)6.97 (7.97) [2.55 to 11.38]7.37 (11.14) [1.20 to 13.5]
Somewhat better (n = 47)2.18 (6.58) [0.25 to 4.11]1.33 (7.78) [–0.95 to 3.61]
About the same (n = 173)0.20 (6.34) [–0.75 to 1.15]2.00 (9.31) [0.61 to 3.40]
Somewhat worse (n = 94)–1.74 (7.72) [–3.32 to –0.16]–2.61 (10.91) [–4.84 to –0.37]
Much worse (n = 8)2.18 (8.10) [–4.59 to 8.95]–3.88 (17.56) [–18.57 to 10.80]
Spearman correlation coefficient–0.230, p < 0.01–0.203, p < 0.01
  • Positive change signified worsening for all scores except PCS/MCS. CSRG: Canadian Scleroderma Research Group; PCS: Physical Component Summary; MCS: Mental Component Summary.