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Journal of Population Sciences

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Table 3 Odds ratio and confidence interval (p=0.05) for certain sexual behaviours by gender and time (2000–2017). Sexual behaviour of all surveyed students

From: Catching up! The sexual behaviour and opinions of Italian students (2000–2017)

  % Value Min Max
First sexual intercourse before 18th birthday
 M 2000 35.8 1   
 M 2017 50.1 1.544 1.353 1.762
 F 2000 33.1 0.904 0.780 1.047
 F 2017 49.9 1.792 1.560 2.058
First sexual intercourse before 16th birthday
 M 2000 12.5 1   
 M 2017 18.6 1.429 1.190 1.716
 F 2000 9.1 0.687* 0.546 0.864
 F 2017 18.9 1.872 1.547 2.265
First non complete experience before 16th birthday
 M 2000 52.5 1   
 M 2017 53.2 0.819 0.719 0.932
 F 2000 42.1 0.680* 0.591 0.783
 F 2017 46.3 0.741 0.647 0.849
First couple relationship before 16th birthday
 M 2000 44.8 1   
 M 2017 47.5 1.132 0.988 1.296
 F 2000 51.6 1.415* 1.224 1.635
 F 2017 52.6 1.605* 1.394 1.850
Often watching porn on the web during the last year
 M 2000 10.4 1   
 M 2017 39.5 5.298 4.516 6.215
 F 2000 0.4 0.071* 0.059 0.085
 F 2017 2.8 0.159* 0.137 0.185
Often speaking about sex with a friend at age 16-18
 M 2000 67.1 1   
 M 2017 67.0 0.936 0.818 1.071
 F 2000 48.3 0.529* 0.459 0.610
 F 2017 46.3 0.402* 0.350 0.462
At least once homosexual experience
 M 2000 6.4 1   
 M 2017 7.2 1.033 0.799 1.337
 F 2000 4.3 0.727* 0.537 0.985
 F 2017 14.9 2.327* 1.811 2.989
  1. Note: Percentages (in italics) and odds ratios for gender × time variable (Men2000 = 1). Seven logistic models fitted on the merged 2000 and 2017 datasets.
  2. The list of the control covariates and their distributions is reported in the Appendix
  3. Bold indicates the odds ratios for 2017 are significantly different from the odds ratios for 2000 for both men and women
  4. For both years the asterisk means that the odd ratio for women is significantly different from that for men