Table 2. Age distribution of male participants in the baseline survey of the J-MICC Study by study region.

Study region		Age, years							Total	Average age (SD)
		35–39	40–44	45–49	50–54	55–59	60–64	65–69
Total	N	2,608	3,549	4,026	5,720	7,232	8,854	8,891	40,880	56.1
	(%)	(6.4)	(8.7)	(9.8)	(14.0)	(17.7)	(21.7)	(21.7)	(100.0)	(9.3)
Chiba	N	293	272	292	347	455	562	697	2,918	55.4
	(%)	(10.0)	(9.3)	(10.0)	(11.9)	(15.6)	(19.3)	(23.9)	(100.0)	(10.1)
Shizuoka-Sakuragaoka	N	240	277	286	435	521	808	563	3,130	55.6
	(%)	(7.7)	(8.8)	(9.1)	(13.9)	(16.6)	(25.8)	(18.0)	(100.0)	(9.3)
Shizuoka	N	265	437	542	585	782	483	312	3,406	52.7
	(%)	(7.8)	(12.8)	(15.9)	(17.2)	(23.0)	(14.2)	(9.2)	(100.0)	(8.7)
Okazaki	N	262	271	353	376	449	824	955	3,490	56.7
	(%)	(7.5)	(7.8)	(10.1)	(10.8)	(12.9)	(23.6)	(27.4)	(100.0)	(9.7)
Aichi Cancer Center	N	192	225	301	462	837	1,119	1,159	4,295	58.2
	(%)	(4.5)	(5.2)	(7.0)	(10.8)	(19.5)	(26.1)	(27.0)	(100.0)	(8.6)
Daiko	N	190	161	185	195	206	241	284	1,462	53.6
	(%)	(13.0)	(11.0)	(12.7)	(13.3)	(14.1)	(16.5)	(19.4)	(100.0)	(10.3)
Iga	N	100	94	76	115	89	94	68	636	51.3
	(%)	(15.7)	(14.8)	(11.9)	(18.1)	(14.0)	(14.8)	(10.7)	(100.0)	(9.8)
Takashima	N	72	58	78	87	161	305	477	1,238	59.3
	(%)	(5.8)	(4.7)	(6.3)	(7.0)	(13.0)	(24.6)	(38.5)	(100.0)	(9.1)
Kyoto	N	431	344	360	369	346	385	341	2,576	51.7
	(%)	(16.7)	(13.4)	(14.0)	(14.3)	(13.4)	(14.9)	(13.2)	(100.0)	(10.3)
Tokushima	N	224	228	191	225	218	221	107	1,414	50.8
	(%)	(15.8)	(16.1)	(13.5)	(15.9)	(15.4)	(15.6)	(7.6)	(100.0)	(9.6)
Fukuoka	N	0	0	0	782	1,131	1,256	1,287	4,456	60.5
	(%)	(0.0)	(0.0)	(0.0)	(17.5)	(25.4)	(28.2)	(28.9)	(100.0)	(5.4)
Saga	N	0	569	591	793	1,048	1,025	1,052	5,078	56.5
	(%)	(0.0)	(11.2)	(11.6)	(15.6)	(20.6)	(20.2)	(20.7)	(100.0)	(8.2)
Kagoshima	N	79	230	366	435	465	738	847	3,160	57.5
	(%)	(2.5)	(7.3)	(11.6)	(13.8)	(14.7)	(23.4)	(26.8)	(100.0)	(8.6)
KOPS	N	260	383	405	514	524	793	742	3,621	55.3
	(%)	(7.2)	(10.6)	(11.2)	(14.2)	(14.5)	(21.9)	(20.5)	(100.0)	(9.6)

KOPS, Kyusyu and Okinawa Population Study; SD, standard deviation.