Table 1. Study populations.

	ERF	MICROS	NSPHS	ORCADES	VIS
N (4034)	800	1086	654	714	780
% Female (56.4)	60.13	56.63	52.75	53.36	57.94
Age	49.65 (15.20)	45.26 (16.08)	46.98 (20.70)	53.59 (15.71)	56.55 (15.36)
Total SPM	532.21 (109.39)	587.03 (114.19)	516.98 (121.98)	468.25 (96.4)	499.01 (105.26)
Total PC	2198.55 (444.36)	2527.88 (457.25)	2249.18 (493.67)	1941.73 (372.96)	2066.56 (427.91)
Total PLPE	52.68 (14.91)	58.21 (17.05)	62.28 (24.28)	42.15 (13.16)	55.60 (15.39)
Total PE	37.22 (16.69)	37.15 (18.12)	20.58 (7.25)	25.02 (11.19)	34.34 (14.55)
Total CER	8.45 (1.95)	9.26 (2.12)	9.30 (2.52)	7.12 (1.83)	9.05 (2.23)

Values for age and lipid concentrations are presented as mean (standard deviation).