Factor structure of the General Health Questionnaire (GHQ-12) in subjects who had suffered from the 2004 Niigata-Chuetsu Earthquake in Japan: a community-based study

Table 1 Background of study subjects

item	category	number	%
Gender	Male	1,310	62.2
	Female	792	37.6
Age when the earthquake occurred (years)
	-29	34	1.6
	30–39	184	8.7
	40–49	304	14.4
	50–64	805	38.2
	65–79	693	32.9
	80-	87	4.1
Place of residence when the earthquake occurred
	Nagaoka City	794	37.7
	Ojiya City	395	18.7
	Mitusuke City	249	11.8
	Tohkamachi City	334	15.9
	Kawaguchi Town	85	4.0
	Koshiji Town	115	5.5
	Yamakoshi Village	115	5.5
Employment
	Farmer	256	12.1
	Other self-employed individuals	238	11.3
	Office worker	643	30.5
	Part-time worker	143	6.8
	Housewife	278	13.2
	Student	1	0.0
	None	462	21.9
Total		2,107

ISSN: 1471-2458