Demographic and behavioral characteristics of non-sex worker females attending sexually transmitted disease clinics in Japan: a nationwide case-control study

Table 1 Demographic profile of Japanese non-sex worker female STI clinic attendees compared with population-based female controls

	STI* clinic attendees (n = 145)		Population-based controls (n = 956)
Characteristic	n	%	n	%	pvalue†
Age at survey					< 0.001§
18-19	19	13.1	18	1.9
20-29	96	66.2	225	23.5
30-39	26	17.9	353	36.9
40-50	4	2.8	360	37.7
Missing	0	0	0	0
Mean(SD*)	25.0(5.9)		36.1(8.7)
Median	23		36
Employment					< 0.001
Self-employed	7	4.8	86	9.0
Management	0	0	6	0.6
Employee	88	60.7	467	48.8
Unemployed, full time student	40	27.6	57	6.0
Housewife	5	3.4	326	34.1
Missing	5	3.4	14	1.5
Marital status					< 0.001
Married	21	14.5	746	78.0
Not married	123	84.8	201	21.0
Missing	1	0.7	9	0.9
Education level					0.43
High school or below	66	45.5	471	49.3
College/university or above	79	54.5	482	50.4
Missing	0	0	3	0.3
HIV/STI-related knowledge score¶					<0.001§
Mean(SD)	11.9(3.0)		9.6(3.6)
Median	12		10

* STI, sexually transmitted infection; SD, standard deviation
†p values for chi-square test unless otherwise noted
¶Score for HIV/STI-related knowledge is the total number of 18 questions answered correctly.
§P values for Student's t-test

ISSN: 1471-2458