Nutritional factors and gastric cancer in Zhoushan Islands, China

Table 4 Odds ratios (ORs)¹ and 95% confidence intervals (CIs) of gastric cancer in relation to quartiles of micronutrients and mineral salts by sex, Zhoushan, China

Nutrient/d2	Q1	Males			P fortrend	Females					P fortrend
		Q2	Q3	Q4		Q1	Q2	Q3	Q4
Carotene	1.0	1.82 (0.81–4.08)	0.40 (0.12–1.35)	0.81 (0.23–2.85)	>0.10	1.0	0.37 (0.08–1.70)	0.37 (0.08–1.78)	-3		0.025
Vitamin A	1.0	0.59 (0.24–1.45)	0.91 (0.39–2.15)	0.43 (0.16–1.21)	>0.10	1.0	0.32 (0.05–2.21)	0.55 (0.10–3.14)	0.10 (0.01–0.89)		0.091
Vitamin C	1.0	1.15 (0.42–3.18)	1.40 (0.53–3.67)	0.88 (0.31–2.53)	>0.10	1.0	0.48 (0.09–2.5)	0.73 (0.15–3.6)	0.07 (0.01–0.95)		>0.10
Vitamin E	1.0	0.79 (0.29–2.11)	0.88 (0.34–2.29)	0.77 (0.26–2.26)	>0.10	1.0	0.93 (0.17–5.03)	1.32 (0.24–7.26)	0.95 (0.15–6.16)		>0.10
Na	1.0	1.36 (0.50–3.7)	0.91 (0.33–2.5)	3.22 (1.25–8.26)	0.070	1.0	3.70 (0.43–31.75)	0.75 (0.09–6.62)	8.40 (1.09–64.77)		>0.10
Ca	1.0	1.65 (0.64–4.20)	1.30 (0.46–3.62)	2.37 (0.81–6.91)	>0.10	1.0	2.30 (0.32–16.54)	3.78 (0.44–32.28)	4.79 (0.58–39.17)		>0.10
Se	1.0	0.48 (0.17–1.37)	0.78 (0.26–2.39)	1.23 (0.37–4.09)	>0.10	1.0	1.18 (0.20–6.87)	0.68 (0.11–4.23)	0.75 (0.12–4.68)		>0.10

¹Adjusted for age, present residence, education, economic status, smoking (males only), alcoholics (males only) and total calories intake;

²Data are ORs, with 95%CIs in parentheses; -³OR_Q4vsQ1 and 95%CI _Q4vsQ1 could not be calculated because of the null value of cases in the 4^th group among females.