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Table 3 Patient outcomes by change in HAQ-DI between month 0 and month 6

From: Use of a “critical difference” statistical criterion improves the predictive utility of the Health Assessment Questionnaire-Disability Index score in patients with rheumatoid arthritis

 

HAQ-DI-dcrit improvement (≥0.68) at month 6 (n = 639)

Small improvement (≥0.22 to < 0.68) at month 6 (n = 961)

No improvement (< 0.22) at month 6 (n = 1295)

Outcome

Month 12

Month 24

Month 12

Month 24

Month 12

Month 24

n

536

385

782

553

928

638

Mean values (standard deviation)

DAS28

2.90 (1.26)

2.86 (1.25)

3.48 (1.33)

3.30 (1.38)

3.83 (1.31)

3.62 (1.27)

Paina

3.1 (2.4)

3.1 (2.5)

4.1 (2.4)

3.8 (2.4)

4.9 (2.3)

4.5 (2.3)

Fatiguea

3.3 (2.6)

3.4 (2.6)

4.2 (2.6)

3.8 (2.7)

4.9 (2.6)

4.5 (2.6)

PGAa

3.1 (2.3)

3.3 (2.5)

4.2 (2.3)

3.8 (2.3)

4.9 (2.3)

4.5 (2.2)

Tender joint count

1.9 (3.3)

1.9 (3.3)

3.6 (4.9)

3.3 (5.0)

4.5 (5.9)

3.8 (5.3)

Swollen joint count

1.3 (2.3)

1.2 (2.5)

2.3 (3.6)

1.9 (3.3)

2.5 (4.0)

2.0 (3.5)

% of patients

HAQ-DI remission (≤0.5)

52.2

54.2

24.7

26.2

8.71

11.1

DAS28 remission (≤2.6)

46.6

48.7

25.2

34.8

17.5

24.4

DAS28-dcrit response (≥1.8 from baseline)

66.0

68.4

50.1

53.5

32.1

36.2

Pain-dcrit response (≥3 from baseline)

67.5

67.9

45.2

47.6

27.2

31.3

Fatigue-dcrit response (≥3 from baseline)

59.7

51.9

38.2

42.5

23.4

27.9

PGA-dcrit response (≥3 from baseline)

67.5

63.9

43.7

48.7

28.7

31.4

  1. Abbreviations: DAS28 Disease Activity Score-28 joints, dcrit critical difference for change beyond random variation, HAQ-DI Health Assessment Questionnaire-Disability Index, PGA patient global assessment
  2. Complete data were not available for all patients
  3. aMeasured on a categorical scale ranging from 0 (best) to 10 (worst)