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Table 1 Clinical characteristics at initiation of 7 bDMARDs (bDMARDs-naïve cases)

From: Drug retention of 7 biologics and tofacitinib in biologics-naïve and biologics-switched patients with rheumatoid arthritis: the ANSWER cohort study

Variable

ABT (n = 390)

ADA (n = 374)

CZP (n = 135)

ETN (n = 616)

GLM (n = 208)

IFX (n = 650)

TCZ (n = 364)

Age (years)

65.5 ± 12.4

55.3 ± 12.8

58.1 ± 16.8

55.5 ± 15.9

62.0 ± 14.8

52.9 ± 13.4

56.6 ± 14.4

Female sex (%)

81.2

79.4

88.8

86.7

86.1

78.0

78.2

Disease duration (years)

9.2 ± 12.4

5.0 ± 7.5

4.7 ± 7.6

8.3 ± 8.7

7.3 ± 10.0

6.9 ± 8.4

7.4 ± 9.4

RF positivity (%)

86.6

73.8

86.2

83.1

75.6

74.2

74.0

ACPA positivity (%)

84.3

75.9

85.7

83.2

73.2

82.9

82.1

DAS28-ESR

4.4 ± 1.2

4.1 ± 1.2

4.6 ± 1.4

4.4 ± 1.4

4.3 ± 1.2

4.5 ± 1.6

4.6 ± 1.5

CDAI

17.7 ± 9.6

14.7 ± 9.1

22.2 ± 12.9

17.3 ± 8.8

17.2 ± 11.5

18.5 ± 12.4

18.1 ± 9.8

HAQ-DI

1.2 ± 0.8

0.7 ± 0.6

1.2 ± 0.8

0.9 ± 0.8

1.1 ± 0.8

1.1 ± 0.9

1.1 ± 0.8

PSL usage (%)

44.2

32.8

44.8

39.2

38.9

36.4

45.7

PSL dose (mg/day)

3.1 ± 7.3

2.9 ± 4.9

1.7 ± 2.6

2.8 ± 3.6

2.3 ± 3.6

3.1 ± 5.9

2.8 ± 3.9

MTX usage (%)

49.1

72.0

76.1

39.4

76.0

100.0

51.2

MTX dose (mg/week)

8.1 ± 2.8

9.4 ± 3.1

9.4 ± 2.9

8.0 ± 2.8

9.2 ± 2.9

8.2 ± 2.5

8.8 ± 3.0

Starting date 2001–2009 (%)

0.0

13.6

0.0

40.4

1.0

60.9

11.5

Starting date 2010–2013 (%)

35.9

53.7

12.6

42.0

40.4

30.2

47.3

Starting date 2014–2019 (%)

64.1

32.7

87.4

17.6

58.7

8.9

41.2

  1. Values are mean ± standard deviation or percentages. bDMARDs biological disease-modifying antirheumatic drugs, ABT abatacept, ADA adalimumab, CZP certolizumab pegol, ETN etanercept, GLM golimumab, IFX infliximab, TCZ tocilizumab, RF rheumatoid factor, ACPA anti-cyclic citrullinated peptide antibody, DAS28-ESR Disease Activity Score in 28 joints using erythrocyte sedimentation rate, CDAI clinical disease activity index, HAQ-DI Health Assessment Questionnaire disability index, PSL prednisolone, MTX methotrexate