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Table 1 Clinical characteristics of the patients with rheumatoid arthritis a from the discovery collection

From: Rheumatoid arthritis response to treatment across IgG1 allotype – anti-TNF incompatibility: a case-only study

Features

All patients

Infliximab

Adalimumab

Patients, number (%)a

205

151 (73.7)

54 (26.3)

Female (%)

83.4

85.4

77.8

Age at diagnosis, median (IQR)

47 (38 to 55)

47 (37 to 55)

48 (40 to 56)

Diagnosis to anti-TNF, median (IQR)

6 (3 to 12)

6 (3 to 12)

6 (2 to 11)

RF, %

74.5

74.7

74.1

ACPA, %

75.7

75.4

76.9

Erosive arthritis, %

84.9

83.5

88.9

Smoking, %

13.9

11.8

20.0

DMARDs before anti-TNF, mean ± SD

2.5 ± 1.2

2.5 ± 1.2

2.6 ± 1.1

Concomitant DMARDs (%)

97.5

98.0

96.3

Baseline ESR, median (IQR)b

34 (19 to 54)

34 (19 to 53)

34 (19 to 57)

Baseline CRP (mg/L), median (IQR)b

11.5 (5.5 to 23.9)

11.5 (5.5 to 23.9)

14.3 (5.5 to 23)

Baseline HAQ, median (IQR)b

1.5 (1.0 to 2.0)

1.5 (1.0 to 2.0)

1.4 (1.0 to 2.0)

DAS28, (mean ± SD)

   

 baseline

5.9 ± 1.2

5.9 ± 1.1

5.9 ± 1.4

 three months

3.9 ± 1.4

4.0 ± 1.5

3.5 ± 1.1

 six months

3.8 ± 1.4

4.0 ± 1.5

3.4 ± 1.2

 twelve months

3.7 ± 1.5

3.8 ± 1.5

3.4 ± 1.6

EULAR response, %

   

 three months

   

  responder

30.4

28.7

34.6

  moderate

50.8

50.4

51.9

  no-responder

18.8

20.9

13.5

 six months

   

  responder

32.8

32.1

34.8

  moderate

43.5

40.7

52.2

  no-responder

23.7

27.1

13.0

 twelve months

   

  responder

43.5

40.2

51.1

  moderate

35.1

40.2

23.4

  no-responder

21.4

19.6

25.5

  1. aOnly patients with successful genotypes are included; bdata from <85% of patients: 157 for baseline ESR, 126 for baseline CRP and 171 for baseline HAQ. ACPA = anti-cyclic citrullinated peptides; CRP = C-reactive protein; DAS28 = Disease Activity Score 28; DMARD = disease modifying anti-rheumatic drugs; ESR = erythrocyte sedimentation rate; EULAR = European League Against Rheumatism; HAQ = Health Assessment Questionnaire; IQR = interquartile range; RF = rheumatoid factor; SD = standard deviation.