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Table 3 Development of disease activity categories scored by rheumatologist PDGA

From: Long-term follow-up of children with chronic non-bacterial osteomyelitis—assessment of disease activity, risk factors, and outcome

 

Baseline

1st follow-up

2nd follow-up

3rd follow-up

4th follow-up

N

%

N

%

N

%

N

%

N

%

Inactive disease (NRS < 1)

130

33.9

148

50.0

135

57.7

78

57.8

54

72.0

Mild disease activity (NRS 1–3)

183

47.7

122

41.2

83

35.5

48

35.6

17

22.7

Severe disease activity (NRS ≥ 4)

71

18.5

26

8.8

16

6.8

9

6.7

4

5.3

  1. Severe disease activity compared from baseline to the 4 YFU: p = 0.000017
  2. NRS numerical rating scale