Table 4 Comparison of HAQ-DI score and SF-36 scores among SSc patients with different disease duration (in years), median [interquartile range]

DcSSc patients

HAQ-DI scores

1.2 [1.1–1.9]

0.8 [0.4–2.2]

1.7 [0.7–2.1]

0.448^a

SF-36 scores

 Physical component summary

40.0 [20.4–55.6]

34.1 [15.0–63.7]

21.9 [15.0–38.1]

0.138^a

 Mental component summary

50.2 [20.0–69.9]

44.3 [17.2–66.3]

28.4 [15.7–57.2]

0.202^a

LcSSc patients

HAQ-DI scores

1.3 [0.3–1.9]

1.9 [0.2–2.1]

1.5 [0.8–1.9]

0.957^a

SF-36 scores

 Physical component summary

24.1 [12.5–64.8]

25.0 [14.4–60.6]

58.1 [24.7–66.6]

0.704^a

 Mental component summary

55.4 [24.2–78.2]

33.6 [27.3–61.2]

47.4 [15.0–64.9]

0.884^a