Table 1. Incidence rate of out-of-hospital cardiac arrest due to suffocation in Osaka Prefecture.

Gender	Age, years	Incidence rate per 100 000 population per year
		Caused by rice cake	Not caused by rice cake	Total
Male	20–39	0.00	5.03	5.03
	40–59	0.73	11.93	12.65
	60–79	11.29	59.60	70.89
	≥80	58.55	425.35	483.90
	Total	6.22	42.11	48.33
Female	20–39	0.09	2.76	2.84
	40–59	0.80	7.69	8.49
	60–79	3.83	33.34	37.17
	≥80	15.34	342.05	357.39
	Total	2.68	40.80	43.48
Total	20–39	0.04	3.88	3.92
	40–59	0.76	9.78	10.54
	60–79	7.34	45.70	53.04
	≥80	29.65	369.65	399.30
	Total	4.36	41.42	45.79