Table 2

The reporting of behaviours in each survey by those aged 16–34 in Natsal 1990 and those 26–44 in Natsal 2000, and odds ratios (OR) for reporting in Natsal 2000 relative to Natsal 1990, adjusting for year of birth

MenWomenOR (95% CI)
BehaviourNatsal 1990 (%)Natsal 2000 (%)Natsal 1990 (%)Natsal 2000 (%)MenWomen
Statistically significant odds ratios for change between 1990 and 2000 are in bold.
*Refers to any kind of sexual experience or contact with someone of the same sex.
†This question only asked of a randomly selected one quarter of respondents in Natsal 1990.
‡Comparison restricted to respondents aged 20–34 in Natsal 1990 and 30–44 in Natsal 2000.
§Comparison restricted to respondents who first had sex before 1990.
Heterosexual intercourse before 1624.727.512.918.2 1.15 (1.02 to 1.29) 1.49 (1.31 to 1.69)
Homosexual experience* before 19905.08.53.56.7 1.80 (1.46 to 2.21) 2.00 (1.61 to 2.48)
Didn't live with both parents till 16†16.018.819.020.01.21 (0.97 to 1.50)1.04 (0.86 to 1.26)
Child before 20‡3.44.113.514.11.20 (0.88 to 1.63)1.05 (0.91 to 1.21)
Lived with someone before 20‡11.311.628.027.81.03 (0.84 to 1.24)0.99 (0.88 to 1.12)
Started menstruating before age 12NANA17.217.7NA1.04 (0.92 to 1.17)
No contraception at first sex§28.928.924.826.11.02 (0.90 to 1.15)1.08 (0.97 to 1.20)
Partner more willing at first sex§†4.56.024.623.51.34 (0.91 to 1.96)0.94 (0.79 to 1.13)
Recently met partner at first sex§†20.019.87.08.60.98 (0.78 to 1.23)1.23 (0.93 to 1.63)
Did not discuss sex with parents when 14†67.576.956.460.4 1.62 (1.35 to 1.95) 1.19 (1.03 to 1.38)
Last school attended single sex15.917.117.818.81.13 (0.98 to 1.30)1.10 (0.97 to 1.24)