Table 1.

Urinary F₂-IsoPs and 15-F_2t-IsoP-M Levels (ng/mg cr) in Middle-Aged and Older Women According to Lifestyle-Related Factors, the Shanghai Women's Health Study

		F2-IsoPs		15-F2t-IsoP-M
	n = 845	Geometric mean (95% CI)a	p-valueb	Geometric mean (95% CI)a	p-valueb
Cigarette smoking regularly
No	822	1.60 (1.54–1.66)		0.56 (0.54–0.58)
Yes	23	2.25 (1.77–2.89)	0.007	0.68 (0.54–0.86)	0.09
Environmental tobacco smoke
No	146	1.68 (1.52–1.86)		0.54 (0.54–0.59)
Yes	699	1.62 (1.54–168)	0.46	0.55 (0.50–0.60)	0.44
Alcohol consumption regularly
No	819	1.63 (1.57–1.70)		0.57 (0.54–0.68)
Yes	26	1.49 (1.18–1.88)	0.45	0.56 (0.54–0.70)	0.94
Physically active past 10 years
No	564	1.64 (1.57–1.73)		0.58 (0.54–0.60)
Yes	281	1.58 (1.48–1.70)	0.42	0.54 (0.51–0.58)	0.11
Tea drink regularly
Never	605	1.62 (1.54–1.70)		0.55 (0.53–0.58)
Ever	240	1.63 (1.52–1.77)	0.77	0.60 (0.56–0.64)	0.03
Fish oil supplement use
Never	633	1.60 (1.51–1.68)		0.57 (0.54–0.59)
Ever	165	1.66 (1.52–1.82)	0.47	0.56 (0.52–0.61)	0.72
Ginseng product use
Never	624	1.66 (1.58–1.75)		0.56 (0.53–0.58)
Ever	221	1.51 (1.39–1.63)	0.03	0.58 (0.54–0.63)	0.09
Vitamin supplement use
Never	716	1.65 (1.57–1.72)		0.58 (0.55–0.60)
Ever	129	1.51 (1.36–1.66)	0.13	0.50 (0.45–0.60)	0.008
History of chronic diseases
No	533	1.66 (1.58–1.75)		0.56 (0.53–0.59)
Yes	312	1.55 (1.45–1.75)	0.12	0.57 (0.54–0.61)	0.56

Missing value was (<5%) not included in the percentage estimation.

^aANOVA estimates (geometric means and standard error of the log-transformed isoprostanes [F₂-IsoPs, 15-F_2t-IsoP-M]) adjusted for age and batches assays for F₂-IsoPs or 15-F_2t-IsoP-M (categories).

^bp-value obtained from the ANOVA of the log-transformed values adjusted for the same variables as above.

ANOVA, analysis of variance; CI, confidence interval.