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Table 1 Baseline demographic and disease characteristics from patients from the BeSt cohort who are included and not included in this study

From: Accelerated hand bone mineral density loss is associated with progressive joint damage in hands and feet in recent-onset rheumatoid arthritis

Demographic variables

Patients included in study (n = 256)

Patients not included in study (n = 252)

Pvalue

Age, years

54 (14)

54 (13)

0.941

Women, %

65

70

0.208

Postmenopausal, %

66

68

0.817

Randomization between the treatment groups, %

Sequential monotherapy: 25

Step-up therapy: 23

Initial combi therapy with prednisone: 27

Initial combi therapy with infliximab: 26

Sequential monotherapy: 25

Step-up therapy: 25

Initial combi therapy with prednisone: 25

Initial combi therapy with infliximab: 25

0.921

Disease related variables

   

Symptom duration, weeks

24 (14-53)

23 (13-53)

0.929

Disease duration, weeks

2 (1-5)

3 (1-5)

0.011

ACPA positive, %, n = 247 (not all baseline)

54

70

0.000

RF positive, %

62

68

0.175

DAS

4.4 (0.9)

4.4 (0.9)

0.529

ESR

37 (19-54)

36 (19-57)

0.781

CRP

20 (9-58)

26 (10-55)

0.272

HAQ score, 0-3 scale

1.4 (0.6)

1.4 (0.7)

0.276

Total SHS, 0-448 scale‡, † n = 248

5.9 (8.2)/2.5 (0.5-8.5)

8.7 (12.7)/4.3 (1.0-11.0)

0.024*

Erosion score, 0-280 scale‡, †

2.8 (4.7)/1 (0.0-3.5)

3.9 (6.2)/1.5 (0.0-5.0)

0.011*

JSN score, 0-168 scale‡, †

3.0 (4.8)/1.0 (0.0-4.1)

4.8 (7.7)/2.0 (0.0-5.6)

0.041*

Total SHS hands, 0-280 scale‡, †

3.0 (4.8)/1.0 (0.0-3.5)

4.6 (8.4)/1.0 (0.0-5.0)

0.217*

Erosion score hands, 0-160 scale‡, †

0.9 (1.8)/0.0 (0.0-1.0)

1.4 (3.1)/0.5 (0.0-1.0)

0.112*

JSN score hands, 0-120 scale‡, †

2.1 (3.9)/0.0 (0.0-3.0)

3.1 (6.0)/0.50 (0.0-3.6)

0.247*

Total SHS feet, 0-168 scale‡, †

2.8 (5.4)/0.5 (0.0-3.0)

4.1 (7.2)/1.5 (0.0-4.5)

0.011*

Erosion score feet, 0-120 scale‡, †

1.9 (3.9)/0.5 (0.0-2.0)

2.5 (4.6)/0.5 (0.0-2.5)

0.123*

JSN score feet, 0-48 scale‡, †

0.9 (2.0)/0.0 (0.0-1.0)

1.7 (3.4)/0.0 (0.0-2.0)

0.013*

Presence erosive damage ≥ 1 unit,

70

74

0.321

% n = 248

28

34

0.166

Presence erosive damage hands ≥ 1 unit, %

40

46

0.205

Presence erosive damage feet ≥ 1 unit, %

   

Hand BMD (g/cm2)

0.59 (0.08)

0.59 (0.09) n = 107

0.870

  1. †Mean (standard deviation); ‡ median (interquartile range); * P values derived from non-parametric tests.
  2. ACPA, anti-citrullinated protein antibodies; BMI, body mass index; CRP, C-reactive protein; DAS, disease activity score; ESR, erythrocyte sedimentation rate; HAQ, health assessment questionnaire; JSN, joint space narrowing; RF, rheumatoid factor; SHS, Sharp-van der Heijde score.