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Table 1 Comparison of bone marker results between manufacturer, healthy controls and rheumatoid arthritis patients

From: Bone marker reference range study: a comparison of the manufacturer’s reference range and laboratory healthy volunteer results to patients with rheumatoid arthritis

 

Manufacturer

Healthy controls

Rheumatoid arthritis

 

Prec

Postd

Male

Prec

Postd

Male

Prec

Postd

Male

βCTX a

ng/L

299

±274

556

±452

300

±284

192

±196

199

±264

325

±382

139

±184

354

±572

337

±410

P1NP b

µg/L

27.8

15-59

37.1

16-74

No data

31.9

22-58

32.6

18-66

51.5

22-79

30.1

11-50

39.1

12-73

40.5

13-81

OC b

µg/L

23.0

11-43

27.0

15-46

25.0

14-42

14.9

11-26

15.3

10-22

20.2

14-36

12.4

5-21

15.3

6-40

19.6

4-42

  1. a mean ± 2 standard deviations (as reported by manufacturer); b median plus interquartile range (as reported by manufacturer); c pre-menopausal female; d post-menopausal female