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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
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