. Author manuscript; available in PMC: 2013 Sep 1.

Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2012 Jul 11;21(9):1574–1581. doi: 10.1158/1055-9965.EPI-12-0138-T

Table 2.

Geometric means of mtDNA by selected variables, among controls only

Variables	Number	Mean (95% CI)	P value
Age at sample collection ^*			0.11
45–50	201	0.50 (0.48–0.54)
51–60	376	0.50 (0.46–0.52)
61–70	224	0.48 (0.44–0.50)
71+	73	0.48 (0.44–0.54)
Sex ^**			<0.0001
Men	379	0.46 (0.44–0.48)
Women	495	0.52 (0.50–0.54)
BMI (Kg/m²)			0.78
<20	147	0.50 (0.48–0.54)
20–<24	484	0.48 (0.46–0.50)
24–<28	202	0.50 (0.46–0.54)
28+	41	0.48 (0.42–0.54)
Smoking status ^†			0.10
Never	646	0.50 (0.48–0.52)
Ever	228	0.46 (0.44–0.50)
Alcohol drinking ^†			0.09
Non-drinkers	704	0.50 (0.48–0.52)
Drinkers	170	0.46 (0.44–0.50)
Diabetes ^†			0.08
No	791	0.50 (0.48–0.52)
Yes	83	0.46 (0.40–0.50)
Weekly physical activity ^†			0.92
No	565	0.48 (0.46–0.50)
Yes	309	0.48 (0.46–0.52)
α-carotene (mcg/day) ^†			0.03
1^st quartile	192	0.46 (0.44–0.48)
2^nd quartile	217	0.48 (0.46–0.52)
3^rd quartile	227	0.50 (0.46–0.52)
4^th quartile	238	0.50 (0.48–0.54)
β-carotene (mcg/day) ^†			0.05
1^st quartile	202	0.46 (0.44–0.50)
2^nd quartile	207	0.48 (0.46–0.52)
3^rd quartile	217	0.52 (0.48–0.54)
4^th quartile	248	0.50 (0.46–0.52)
Lutein (mcg/day) ^†			0.17
1^st quartile	201	0.46 (0.44–0.50)
2^nd quartile	214	0.50 (0.46–0.54)
3^rd quartile	230	0.50 (0.46–0.52)
4^th quartile	229	0.50 (0.46–0.52)
Green vegetable (g/day) ^†			0.14
1^st quartile	199	0.46 (0.44–0.50)
2^nd quartile	212	0.48 (0.44–0.50)
3^rd quartile	241	0.52 (0.48–0.54)
4^th quartile	222	0.48 (0.46–0.52)
Cruciferous vegetable (g/day) ^†			0.09
1^st quartile	191	0.46 (0.44–0.50)
2^nd quartile	225	0.48 (0.46–0.52)
3^rd quartile	239	0.50 (0.46–0.52)
4^th quartile	219	0.50 (0.46–0.54)
Yellow vegetable (g/day) ^†			0.07
1^st quartile	208	0.48 (0.44–0.50)
2^nd quartile	212	0.48 (0.46–0.52)
3^rd quartile	221	0.48 (0.46–0.52)
4^th quartile	233	0.50 (0.48–0.54)
Total energy intake (Kcal/day) ^†			0.40
1^st quartile	190	0.48 (0.44–0.52)
2^nd quartile	229	0.48 (0.46–0.52)
3^rd quartile	231	0.50 (0.46–0.52)
4^th quartile	224	0.50 (0.46–0.52)

Adjusted for sex and batch number.

^**

Adjusted for age and batch number.

^†

Adjusted for age, sex, and batch number.