Table 2 Influencing factors analysis of multiple sexual partners among 362 participants

Whether it can be judged by appearance that a person is infected with HIV?

Wrong/don’t know

46(20.7)

27(19.3)

Ref

——

——

Correct

176(79.3)

113(80.7)

0.91(0.54–1.55)

0.740

——

——

Whether daily life and study contact will spread HIV?

Wrong/don’t know

42(18.9)

31(22.1)

Ref

——

——

Correct

180(81.1)

109(77.9)

1.22(0.72–2.05)

0.475

——

——

Have you learned about HIV/AIDS through the school network in the past year?

No

164(73.9)

107(76.4)

Ref

——

——

Yes

58(26.1)

33(23.6)

1.15(0.70–1.88)

0.585

——

——

Have you received any publicity about HIV testing from the school in the last year?

No

74(33.3)

41(29.3)

Ref

——

——

Yes

148(66.7)

99(70.7)

0.83(0.52–1.31)

0.421

——

——

Have you received an HIV risk self-assessment conducted by the school in the past year?

No

115(51.8)

69(49.3)

Ref

——

——

Yes

107(48.2)

71(50.7)

0.90(0.59–1.38)

0.641

——

——

Age (yrs)

Less than or equal to 19

80(36.0)

46(32.9)

Ref

Ref

20–21

108(48.7)

71(50.7)

0.88(0.55–1.40)

0.577

0.82(0.48–1.40)

0.460

Greater than or equal to 22

34(15.3)

23(16.4)

0.85(0.45–1.61)

0.620

0.71(0.35–1.45)

0.346

Province of household registration

Other provinces

70(31.5)

33(23.6)

Ref

Ref

Zhejiang Province

152(68.5)

107(76.4)

0.67(0.41–1.09)

0.103

0.65(0.38–1.12)

0.121

Source of origin hometown

Rural area

118(53.2)

90(64.3)

Ref

Ref

Town/city

104(46.8)

50(35.7)

1.59(1.03–2.45)

0.037

1.39(0.84–2.30)

0.201

Monthly living expenses (CNY*)

Less than or equal to 1000

54(24.3)

45(32.1)

Ref

Ref

1001–1500

58(26.1)

52(37.2)

0.93(0.54–1.60)

0.792

1.19(0.65–2.19)

0.580

Greater than or equal to 1501

110(49.6)

43(30.7)

2.13(1.26–3.62)

0.005

2.24(1.21–4.16)

0.010

Will you accept one night stand?

Don’t accept/don’t know

32(14.4)

37(26.4)

Ref

Ref

Yes

190(85.6)

103(73.6)

2.13(1.26–3.63)

0.005

1.53(0.79–2.95)

0.206

Do you accept commercial sex?

Don’t accept/don’t know

83(37.4)

80(57.1)

Ref

Ref

Yes

139(62.6)

60(42.9)

2.23(1.45–3.44)

< 0.001

1.61(0.95–2.75)

0.078

Have you had sex with a fixed partner in the past year?

No

71(32.0)

48(34.3)

Ref

——

——

Yes

151(68.0)

92(65.7)

1.11(0.71–1.74)

0.650

——

——

Have you ever had sexual behavior after consuming alcohol?

No

106(47.7)

97(69.3)

Ref

Ref

Yes

116(52.3)

43(30.7)

2.47(1.58–3.85)

< 0.001

2.19(1.32–3.63)

0.002

Whether discussed using condoms during sexual intercourse?

No

70(31.5)

26(18.6)

Ref

Ref

Yes

152(68.5)

114(81.4)

0.50(0.30–0.83)

0.007

0.50(0.28–0.89)

0.018

Casual partner types

School student

123(55.4)

109(77.9)

Ref

Ref

Non-student

99(44.6)

31(22.1)

2.83(1.75–4.57)

< 0.001

2.51(1.45–4.22)

0.001

Condom use with casual partners

Never used

32(14.4)

23(16.4)

Ref

Ref

Sometimes/frequently used

109(49.1)

51(36.4)

1.54(0.82–2.89)

0.182

1.89(0.92–3.87)

0.082

Every time used

81(36.5)

66(47.2)

0.88(0.47–1.65)

0.695

1.04(0.50–2.16)

0.917

Have there ever been commercial sex acts involving money transactions?

No

163(73.4)

108(77.1)

Ref

——

——

Yes

59(26.6)

32(22.9)

1.22(0.75-2.00)

0.472

——

——

Do you want to know that your sex partner may be infected with HIV?

No

109(49.1)

72(51.4)

Ref

——

——

Yes

113(50.9)

68(48.6)

1.10(0.72–1.68)

0.666

——

——

Do you think that you are at risk of contracting HIV?

No/Don’t know

199(89.6)

123(87.9)

Ref

——

——

Yes

23(10.4)

17(12.1)

0.84(0.43–1.63)

0.599

——

——

Have you received voluntary counseling and testing?

No

206(92.8)

128(91.4)

Ref

——

——

Yes

16(7.2)

12(8.6)

0.83(0.38–1.81)

0.636

——

——

How about condom use during sex with a regular partner in the past year? (n = 243)

Never used

22(14.6)

15(16.3)

Ref

——

——

Sometimes/frequently used

78(51.6)

38(41.3)

1.40(0.65-3.00)

0.387

——

——

Every time used

51(33.8)

39(42.4)

0.89(0.41–1.94)

0.772

——

——