Table 3 Substance use and psychosocial characteristics among college students who had sex in the last year

Substance use before sex

 Smoking before sex

9.146

 0.002

  Yes

347(24.3)

265(22.6)

82(31.5)

  No

1083(75.7)

905(77.4)

178(68.5)

 Using e-cigarettes before sex

 16.012

 <0.001

  Yes

120(8.4)

82(7.0)

38(14.6)

  No

1310(91.6)

1088(93.0)

222(85.4)

 Drinking alcohol before sex

 18.235

 <0.001

  Yes

502(35.1)

381(32.6)

121(46.5)

  No

928(64.9)

789(67.4)

139(53.5)

 Using club drugs before sex

25.452

 <0.001

  Yes

30(2.1)

14(1.2)

16(6.2)

  No

1400(97.9)

1156(98.8)

244(93.8)

Psychosocial characteristics

 Score on SRBBS, M (IQR)^a

  Attitudes towards condom use points

15.0

(12.0 ~ 15.0)

15.0

(13.0 ~ 15.0)

12.0

(11.0 ~ 15.0)

0.294

< 0.001

  Norms on condom use points

15.0

(12.0 ~ 15.0)

15.0

(12.0 ~ 15.0)

12.0

(10.0 ~ 15.0)

0.215

< 0.001

  Self-efficacy of condom use points

14.0

(11.0 ~ 15.0)

15.0

(12.0 ~ 15.0)

11.0

(9.0 ~ 12.0)

0.319

< 0.001

 Five-factor model of Personality, M (IQR)

  Extraversion

6.0(6.0 ~ 7.0)

6.0(6.0 ~ 7.0)

6.0(6.0 ~ 7.8)

0.021

0.419

  Agreeableness

6.0(6.0 ~ 7.0)

6.0(6.0 ~ 7.0)

6.0(5.0 ~7.0)

0.029

0.269

  Conscientiousness

6.0(6.0 ~ 7.0)

6.0(6.0 ~ 7.0)

6.0(6.0 ~ 8.0)

0.012

0.643

  Neuroticism

6.0(5.0 ~ 7.0)

6.0(5.0 ~ 7.0)

6.0(5.0 ~ 7.0)

0.016

0.535

  Openness

8.0(6.0 ~ 9.0)

8.0(6.0 ~ 9.0)

8.0(6.0 ~ 9.0)

0.033

0.214

 Sensation seeking, M (IQR)

  Experience seeking

6.0(4.0 ~ 7.0)

6.0(4.0 ~ 7.0)

6.0(4.0 ~ 7.0)

0.025

0.337

  Boredom susceptibility

6.0(5.0 ~ 7.0)

6.0(5.0 ~ 7.0)

6.0(5.0 ~ 7.0)

0.010

0.708

  Thrill adventure seeking

6.0(5.0 ~ 8.0)

6.0(5.0 ~ 8.0)

6.0(5.0 ~ 8.0)

0.020

0.439

  Disinhibition

4.0(3.0 ~ 6.0)

4.0(3.0 ~ 5.0)

4.0(3.0 ~ 6.0)

0.089

0.001

  Sexual compulsivity

18.0 (11.0 ~ 21.0)

17.0 (10.0 ~ 21.0)

20.0 (13.0 ~ 23.0)

0.151

< 0.001