Table 4: Multiple logistic regression analysis of background factors associated with selection of cities with a population greater than that of Kagoshima City.

		Odds Ratio	95% C.I.		P value
			Lower	Upper
Gender	Female	1.47	0.55	3.93	0.44
Age	24 (as standard)
	25	0.35	0.06	1.93	0.23
	26	0.51	0.09	3.00	0.45
	27	0.74	0.10	5.36	0.77
	28	0.19	0.01	2.41	0.20
	29	0.11	0.01	1.58	0.11
	30～34	0.35	0.04	2.88	0.33
	35～39	0.69	0.04	11.86	0.80
	40～69	0.41	0.02	6.73	0.53
Graduation year	every 1 year from 2005
		1.15	0.97	1.37	0.11
Repeat year	Yes	1.56	0.37	6.61	0.55
Fail the National Exam.	Yes	1.35	0.25	7.45	0.73
Hometown	Kagoshima prefecture (as standard)
	Kyushu reigion (except Kagoshima)	0.51	0.14	1.88	0.31
	Shikoku region	0.31	0.06	1.65	0.17
	Chugoku region	1.87	0.18	19.68	0.60
	Kinki region	0.60	0.16	2.27	0.45
	Chubu region	0.88	0.17	4.52	0.87
	Kanto region	0.70	0.17	2.86	0.62
	Tohoku region, Hokkaido region	3.07x108	0.00		1.00