. Author manuscript; available in PMC: 2008 Nov 18.

Published in final edited form as: Ann Rheum Dis. 2008 Jul 14;67(11):1570–1573. doi: 10.1136/ard.2008.094771

Table 1.

Participant characteristics of ancillary hand osteoarthritis study

	Vitamin K supplementation arm (n = 193)	Placebo arm (n = 185)
Mean age, years (SD)	68.0 (5.5)	68.3 (5.6)
% Female	57.5	61.6
BMI, kg/m² (SD)	28.5 (5.4)	27.6 (4.6)
% Ever smoker	54.9	56.8
% Attained any college education	55.4	49.7
Baseline 25(OH) vitamin D, ng/ml (SD)	23.0 (8.6)	22.8 (8.9)
Baseline plasma phylloquinone, nM (SD)	1.27 (1.76)	1.10 (1.37)
Final plasma phylloquinone, nM (SD)	3.13 (2.81)	1.09 (1.02)

BMI, body mass index.