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Table 2 Knee osteoarthritis in participants by Kellgren–Lawrence (KL) grade at baseline, and changes over 5 years

From: Serum hyaluronic acid concentration predicts the progression of joint space narrowing in normal knees and established knee osteoarthritis – a five-year prospective cohort study

Baseline

Endpoint

Development/progression

KL grade

Number

KL grade

0/1

2

3

4

0, 1

323

194

96

33

 

129

2

91

 

44

43

4

47

3

28

  

14

14

14

4

2

   

2

 

Total

444

194

140

90

20

190

  1. The values are the numbers of participants
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Arthritis Research & Therapy

ISSN: 1478-6362

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