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Table 5 Variability of selected biomarkers in stable subjects.

From: COPD association and repeatability of blood biomarkers in the ECLIPSE cohort

Biomarker

COPD Subjects*

Smoker Controls

Non-smoker Controls

All Subjects

CC-16

132/146 (90%)

29/35 (83%)

31/34 (91%)

192/215 (89%)

C-reactive protein

32/153 (21%)

7/36 (19%)

12/35 (34%)

51/224 (23%)

CCL24

51/144 (35%)

8/32 (25%)

16/35 (46%)

75/211 (36%)

Fibrinogen

139/156 (89%)

31/36 (86%)

35/36 (97%)

205/228 (90%)

Hepatocyte growth factor

57/152 (38%)

17/36 (47%)

19/36 (53%)

93/224 (42%)

Interleukin-6

55/147 (37%)

22/34 (65%)

24/36 (67%)

101/217 (47%)

Interleukin-8

67/141 (48%)

12/35 (34%)

13/33 (39%)

92/209 (44%)

Interleukin 12p40

64/124 (52%)

14/27 (52%)

20/30 (67%)

98/181 (54%)

CXCL10

86/152 (57%)

19/35 (54%)

23/34 (68%)

128/221 (58%)

CCL2

72/154 (47%)

22/36 (61%)

13/36 (36%)

107/226 (47%)

Matrix metalloproteinase-9

53/154 (34%)

8/36 (22%)

18/36 (50%)

79/226 (35%)

CCL23

93/154 (60%)

20/36 (56%)

23/36 (64%)

136/226 (60%)

Myeloperoxidase

52/154 (34%)

7/35 (20%)

15/36 (42%)

74/225 (33%)

CCL-18

53/135 (39%)

15/26 (58%)

15/35 (43%)

83/196 (42%)

Prolactin

47/148 (32%)

7/36 (19%)

9/35 (26%)

63/219 (29%)

Surfactant Protein D

107/145 (74%)

26/35 (74%)

30/34 (88%)

163/214 (76%)

  1. Expressed as a percentage of subjects in which the 3-month value was within 25% of the baseline value. *COPD subjects with exacerbations within 30 days of the 3-month visit or subjects using oral steroids within 14 days of the 3 month visit were excluded.