Proportions by weighting scheme and in Natsal-3 | Odds ratios relative to Natsal-3 | Bias3 relative to Natsal-3 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Behaviour | Age-sex | PSA 1 | PSA 2 | PSA 3 | PSA 4 | PSA 5 | Natsal-3 | Age-sex | PSA5 | Age-sex | PSA5 |
‘Binge’ drinks once a week or more1 | 0.170 | 0.168 | 0.163 | 0.167 | 0.162 | 0.165 | 0.214 | 0.75 | 0.73 | moderate | moderate |
Both equally willing at first sex | 0.882 | 0.886 | 0.888 | 0.890 | 0.901 | 0.899 | 0.911 | 0.73 | 0.87 | moderate | small |
Contraception used at first sex | 0.864 | 0.864 | 0.872 | 0.868 | 0.872 | 0.864 | 0.820 | 1.39 | 1.39 | moderate | moderate |
First sex at about the right time | 0.608 | 0.623 | 0.622 | 0.633 | 0.648 | 0.641 | 0.743 | 0.54 | 0.62 | large | moderate |
Experience not all with opposite sex | 0.162 | 0.155 | 0.119 | 0.119 | 0.110 | 0.089 | 0.072 | 2.49 | 1.26 | large | moderate |
Had heterosexual oral sex in last year | 0.715 | 0.727 | 0.742 | 0.747 | 0.746 | 0.747 | 0.793 | 0.65 | 0.77 | moderate | moderate |
Had heterosexual anal sex in last year | 0.204 | 0.203 | 0.202 | 0.211 | 0.197 | 0.202 | 0.176 | 1.20 | 1.19 | small | small |
Sex without condom in last 4 weeks | 0.769 | 0.779 | 0.781 | 0.776 | 0.791 | 0.790 | 0.749 | 1.12 | 1.26 | small | moderate |
1+ same gender partners last 5 years | 0.079 | 0.076 | 0.046 | 0.050 | 0.045 | 0.036 | 0.030 | 2.77 | 1.21 | large | small |
Attended STI clinic in last 5 years | 0.143 | 0.141 | 0.128 | 0.128 | 0.125 | 0.134 | 0.187 | 0.73 | 0.67 | moderate | moderate |
Attended STI clinic in last year | 0.058 | 0.055 | 0.046 | 0.046 | 0.046 | 0.049 | 0.069 | 0.83 | 0.70 | small | moderate |
Ever STI diagnosis | 0.123 | 0.126 | 0.119 | 0.116 | 0.105 | 0.113 | 0.133 | 0.91 | 0.83 | small | small |
Ever taken illicit drugs | 0.446 | 0.459 | 0.456 | 0.451 | 0.448 | 0.446 | 0.523 | 0.73 | 0.73 | moderate | moderate |
Ever taken cannabis | 0.407 | 0.419 | 0.416 | 0.410 | 0.410 | 0.409 | 0.491 | 0.71 | 0.72 | moderate | moderate |
1+ new heterosexual partners last year | 0.247 | 0.236 | 0.232 | 0.238 | 0.222 | 0.222 | 0.274 | 0.87 | 0.76 | small | moderate |
0 heterosexual partners lifetime | 0.116 | 0.099 | 0.088 | 0.087 | 0.086 | 0.089 | 0.060 | 2.06 | 1.53 | large | moderate |
0 heterosexual partners last 5 years | 0.143 | 0.124 | 0.107 | 0.107 | 0.106 | 0.109 | 0.077 | 2.00 | 1.47 | large | moderate |
0 heterosexual partners last year | 0.200 | 0.183 | 0.165 | 0.167 | 0.157 | 0.161 | 0.112 | 1.98 | 1.52 | large | moderate |
Heterosexual sex 5+ occasions last 4 weeks | 0.511 | 0.520 | 0.519 | 0.528 | 0.546 | 0.550 | 0.464 | 1.21 | 1.41 | small | moderate |
Ever paid for heterosexual sex | 0.132 | 0.129 | 0.128 | 0.125 | 0.117 | 0.117 | 0.104 | 1.31 | 1.14 | moderate | small |
Had a sexual function problem in last year2 | 0.437 | 0.433 | 0.423 | 0.411 | 0.397 | 0.396 | 0.395 | 1.19 | 1.00 | small | small |
Easy to talk to parent(s) about sex at age 14 | 0.161 | 0.153 | 0.151 | 0.160 | 0.162 | 0.167 | 0.184 | 0.85 | 0.89 | small | small |