Table 2

Sexual behavior 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

%

p value†


Age at first sexual intercourse (years)

<0.001

<19

105

72.4

244

25.5

19 or older

38

26.2

641

67.1

Missing

2

1.4

71

7.4

Mean(SD*)

17.6(2.7)

20.5(3.3)

Median

17

20

No. of partners (previous year)

<0.001

1

56

38.6

871

91.1

2 or 3

33

22.8

65

6.8

4 or more

30

20.7

12

1.3

Missing

26

17.9

8

0.8

Type of sex partner (previous year)

Regular partner

0.011

Yes

139

95.9

942

98.5

No

6

4.1

10

1.0

Missing

0

0

4

0.4

Casual Partner

<0.001

Yes

58

40.0

35

3.7

No

86

59.3

908

95.0

Missing

1

0.7

13

1.4

Sex with regular partners (previous year)

Had unprotected vaginal sex

Yes

119

82.1

622

65.1

<0.001

No

17

11.7

268

28.0

Missing

9

6.2

66

6.9

Had unprotected oral sex

Yes

122

84.1

524

54.8

<0.001

No

18

12.4

375

39.2

Missing

5

3.4

57

6.0

Had unprotected anal sex

Yes

10

6.9

42

4.4

0.31

No

130

89.7

851

89.0

Missing

5

3.4

63

6.6

Sex with casual partners (previous year)

Had unprotected vaginal sex

Yes

44

30.3

20

2.1

<0.001

No

94

64.8

922

96.4

Missing

7

4.8

14

1.5

Had unprotected oral sex

Yes

40

27.6

17

1.8

<0.001

No

97

66.9

925

96.8

Missing

8

5.5

14

1.5

Had unprotected anal sex

Yes

0

0

1

0.1

1.00

No

138

95.2

941

98.4

Missing

7

4.8

14

1.5


* STI, sexually transmitted disease; SD, standard deviation

p values for chi-square test unless otherwise mentioned

Ono-Kihara et al. BMC Public Health 2010 10:106   doi:10.1186/1471-2458-10-106

Open Data