Table 3 Multivariate analysis of substance use of Japanese MSM recruited through the Internet.

Age group

14–19

1

1

20–29

1.60

1.07–2.40

.023

1.53

0.85–2.77

.160

30–39

2.12

1.38–3.25

.001

2.62

1.41–4.86

.002

40+

1.02

0.62–1.67

.944

1.16

0.57–2.38

.679

Education level

No University degree

1

1

University degree

0.74

0.56–0.94

.012

0.66

0.48–0.89

.007

Sexual orientation

Gay

1

1

Bisexual

0.81

0.62–1.06

.120

1.00

0.68–1.46

.985

Other

0.62

0.42–0.92

.016

1.19

0.72–1.98

.502

Currently have a casual sex partner

No

1

1

Yes

1.24

0.96–1.60

.104

2.57

1.84–3.59

.000

Depression

No

1

1

Yes

1.12

0.84–1.50

.447

2.27

1.58–3.27

.000

HIV status

Negative

1

1

Positive

2.91

0.92–9.21

.070

7.78

2.33–25.93

.001

UAI in the previous 6 months

No anal intercourse

1

1

Protected

1.57

0.95–2.58

.078

1.20

0.56–2.56

.634

Unprotected

2.53

1.53–4.17

.000

2.42

1.14–5.16

.022

Number of sex partners in the previous 6 months

0

1

1

1

0.82

0.54–1.25

.360

1.08

0.59–1.98

.804

2–3

1.04

0.68–1.58

.864

1.06

0.59–1.92

.838

4–5

1.44

0.90–2.29

.127

1.22

0.65–2.30

.543

6+

1.67

1.05–2.67

.031

2.13

1.15–3.95

.016

Sex club in the previous 6 months

No

1.00

1

Yes

1.64

1.29–2.09

.000

2.00

1.44–2.80

.000

Gay venue in the previous 6 months

No

1.00

1

Yes

1.65

1.32–2.01

.000

2.56

1.78–3.39

.000

Tested for HIV within the past year

No

1

1

Yes

1.42

1.08–1.88

.013

1.78

1.25–2.54

.001

HIV/STI knowledge score

0–4

1

1

5(full score)

1.22

0.98–1.52

.081

1.59

1.18–2.16

.003