Serum selenium and single-nucleotide polymorphisms in genes for selenoproteins: relationship to markers of oxidative stress in men from Auckland, New Zealand

Table 1 Demographic characteristics of the study group

	N (%)	Mean (SD)	Range
Age at joining study in years		52.3 (13.9)	20–81
<40	96 (19.1)
40–60	242 (48.1)
>60	165 (32.8)
Height (cm)		177.6 (6.4)	161–201
Weight (kg)		84.2 (12.5)	55–145
BMI		26.7 (3.7)	17.2–44.8
<25	168 (34.8)
25–30	240 (49.7)
>30	75 (15.5)
Serum Se level (ng/ml)		111.6 (1.21)^a	63–305^a
Smoking status
Current	27 (5.4)
Former	148 (29.4)
Never	328 (65.2)
Alcohol consumption
Yes	438 (87.1)
No	65 (12.9)
Family history of cancer^b
With no family history of cancer	165 (32.8)
With family history of cancer	338 (67.2)
Dietary supplements
No dietary supplements taken	275 (55.3)
Dietary supplements taken	222 (44.7)

^aTo convert serum Se level in ng/ml to μmol/l multiply by 0.0127
^bA positive family history of cancer was considered if one or more close relatives have recorded cancer (including grandparents, parents, siblings, children, paternal and maternal uncles and aunts)

ISSN: 1865-3499