Table 1.

Population characteristics. Smoking status was self-reported at the time of blood sampling.

Population		Age		BMI		Smoking
		Range	Mean	Range	Mean	current	non	never
Total	632	30, 75	52	19, 40	26	144	140	348
Males	239	30, 75	53	19, 49	27	44	76	119
Females	393	30, 65	51	19,39	26	100	64	229
EPIC	226	37, 75	53	19, 36	26	58	60	108
NSHD	406	30, 61	52	19, 40	26	86	80	240