Determinants of Resting Oxidative Stress in Middle-Aged and Elderly Men and Women: WASEDA’S Health Study

Table 7

Stepwise multiple regression analysis of each oxidative stress marker in women.

	Partial regression coefficient	95% confidence interval	Standard partial regression coefficient	VIF	value
PC^1
Intercept	1.905	1.789–2.021			<0.001
Anti-inflammatory medication	-0.547	-1.080–0.015	-0.12	1.00	0.044
F2-IsoP^2
Intercept	-38.144	-80.099–3.810			0.075
Smokers	11.447	3.408–19.486	0.16	1.03	0.005
BMI (kg/m^2)	1.690	0.312–3.068	0.14	1.04	0.016
Antioxidant supplementation	-9.859	-19.724–−0.006	-0.11	1.01	0.050
Energy intake (kcal/day)	0.007	-0.001–−0.016	0.10	1.01	0.078
TBARS^3
Intercept	2.058	0.967–3.149			<0.001
α-Tocopherol (mg/day)	0.054	0.019–0.090	0.27	2.71	0.003
β-Carotene (μg/day)	-4.556	0.000–0.000	-0.24	2.64	0.008
CRF (mL/kg/min)	0.026	0.012–0.039	0.23	1.23	<0.001
Age (years)	0.017	0.008–0.027	0.25	1.65	<0.001
HbA1c (%)	-0.231	-0.443–−0.019	-0.14	1.41	0.033
Anti-inflammatory medication	0.362	0.065–0.659	0.13	1.01	0.017
Leg extension power (W)	0.00004	-0.001–0.000	-0.16	1.11	0.006

VIF: variance inflation factor; PC: protein carbonyl; F₂-IsoP: F₂-isoprostane; TBARS: thiobarbituric acid reactive substances; BMI: body mass index; CRF: cardiorespiratory fitness; HbA1c: haemoglobin A1c. , adjusted ; , adjusted ; , adjusted .