Table 5. Age adjusted hazard ratios of stomach cancer for intake of starch food and style of breakfast by sex.

	Male				Female
	No. of death	Hazard ratio	95% confidence interval	p for trend	No. of death	Hazard ratio	95% confidence interval	p for trend
Rice (cup)
1/day or less	47	0.93	0.68 - 1.28		36	1.25	0.86 - 1.80
2/day	96	1.09	0.85 - 1.39		52	0.96	0.70 - 1.32
3/day	198	1.00	(reference)		132	1.00	(reference)
4/day	60	0.93	0.69 - 1.24		18	0.96	0.58 - 1.57
5/day	69	1.05	0.80 - 1.38		18	1.31	0.80 - 2.15
6+/day	69	0.97	0.74 - 1.28	0.87	8	0.75	0.37 - 1.54	0.54
Rice (cup) (thirties)
1/day or less	7	1.38	0.63 - 3.01		8	1.91	0.89 - 4.08
2/day	36	0.87	0.58 - 1.32		26	1.09	0.66 - 1.79
3/day	59	1.00	(reference)		39	1.00	(reference)
4/day	35	1.15	0.76 - 1.75		23	1.21	0.72 - 2.03
5/day	54	1.09	0.75 - 1.57		26	0.96	0.58 - 1.58
6+/day	215	1.08	0.81 - 1.44	0.42	87	1.18	0.80 - 1.72	0.99
Potato
1-2/month or less	96	1.00	(reference)		36	1.00	(reference)
1-2/week	181	1.08	0.84 - 1.38		67	0.66	0.44 - 0.98
3-4/week	146	1.06	0.82 - 1.38		91	0.85	0.58 - 1.26
1+/day	94	1.08	0.81 - 1.44	0.65	61	0.86	0.57 - 1.29	0.74
Japanese style breakfast
No	55	1.00	(reference)		36	1.00	(reference)
Yes	397	1.30	0.98 - 1.72		184	1.24	0.87 - 1.77
Western style breakfast
No	418	1.00	(reference)		182	1.00	(reference)
Yes	34	0.49	0.35 - 0.70		38	0.82	0.58 - 1.17
Tea gruel for breakfast
No	396	1.00	(reference)		198	1.00	(reference)
Yes	29	1.50	1.03 - 2.18		5	0.50	0.21 - 1.22