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Table 3 Multivariate analyses assessing the effects of timing of sexual initiation on subsequent sexual behavior and risks.

From: Early initiation of sexual activity: a risk factor for sexually transmitted diseases, HIV infection, and unwanted pregnancy among university students in China

Variables

BHS

HS

Univ

 

Adjusted Odds Ratio (95% Confidence Interval)

Partner type first sexa

   

   Non-regular vs. regular

5.24 (3.28–8.36)

1.90 (1.40–2.59)

1.00

Condom use first sexa

   

   Not used/unsure vs. used

2.55 (1.50–4.33)

1.30 (1.03–1.64)

1.00

Partner type recent sexa

   

   Non-regular vs. regular

3.70(2.22–6.15)

1.36 (0.96–1.95)

1.00

Condom use recent sexa

   

   Not used vs. used

1.62 (1.05–2.52)

1.06 (0.85–1.33)

1.00

Partner type last yearb

   

   Non-regular vs. regular

1.01 (0.40–2.54)

0.96 (0.61–1.53)

1.00

Condom use last yearb

   

   Never/rarely/sometime vs. always/often

3.28 (1.36–7.89)

1.24 (0.88–1.73)

1.00

OC use by partner last yearb

   

   Never/rarely/sometime vs. always/often

2.68 (1.03–6.98)

1.40 (0.96–2.06)

1.00

Partner number last yearb

   

   ≥ 2 vs. 1

1.44 (0.58–3.62)

1.43 (0.93–2.21)

1.00

Condom use lifetimeb

   

   Never/rarely/sometimes vs. always/often

3.55 (1.74–7.26)

1.17 (0.88–1.56)

1.00

Partner number lifetimeb

   

   ≥ 2 vs.1

4.19 (1.84–9.54)

2.81 (2.02–3.89)

1.00

Anal sex lifetimeb

   

   Yes vs. no

2.28 (0.63–8.23)

1.15 (0.55–2.42)

1.00

Partner's pregancy lifetimeb

   

   Yes vs. no/unsure

2.89 (1.21–6.94)

1.42 (0.91–2.22)

1.00

Partner's induced abortion lifetimeb

   

   Yes vs. no/unsure

2.95 (1.20–7.26)

1.48 (0.93–2.36)

1.00

Diagnosed with an STD lifetimeb

   

   Yes vs. no

26.13 (2.94–232.09)

5.11 (1.20–2.76)

1.00

  1. a Odds ratio with 95% confidence interval in parentheses is adjusted for university, grade, faculty, hometown area, and family economic status.
  2. b Odds ratio with 95% confidence interval in parentheses is further adjusted for the duration of sexual experience.