Characteristic | n | OR | p | 95% CI |
---|---|---|---|---|
Age at time of interview | 1003 | 0.96 | * | 0.92–1.00 |
Index of multiple deprivation | ||||
First quintile (least deprived) | 167 | 0.51 | * | 0.26–1.00 |
Second quintile | 212 | 0.80 | 0.45–1.42 | |
Third quintile | 200 | 0.36 | ** | 0.18–0.70 |
Fourth quintile | 210 | 0.68 | 0.38–1.22 | |
Fifth quintile (most deprived) [ref] | 209 | 1.00 | ||
Age at first sexual experience | 998 | 0.87 | ** | 0.80–0.95 |
Ethnicity | ||||
White [ref] | 900 | 1.00 | ||
Black | 46 | 3.76 | ** | 1.61–8.80 |
Indian | 16 | 1.27 | 0.22–7.28 | |
Pakistani and Bangladeshi | 5 | 4.19 | 0.39–44.5 | |
Chinese, other Asian and Other | 36 | 2.80 | * | 1.15–6.82 |
Number of natural children | 1003 | 1.33 | ** | |
Education | ||||
Left school at 16 with no qualifications | 161 | 2.61 | ** | 1.37–4.99 |
Left school at 16 with some qualifications | 309 | 2.36 | *** | 1.46–3.81 |
Left school at 17+ [ref] | 529 | 1.00 | ||
Housing tenure | ||||
Own outright/with mortgage or loan [ref] | 598 | 1.00 | ||
Rented accommodation | 402 | 1.96 | ** | 1.27–3.03 |
Contraceptive use at first intercourse | ||||
Condom (+ other modern method) [ref] | 470 | 1.00 | ||
Other reliable | 122 | 0.76 | 0.38–1.56 | |
Non-reliable (withdrawal/rhythm) | 86 | 1.96 | * | 1.00–3.87 |
Non–use | 314 | 2.04 | ** | 1.25–3.32 |
Number of sexual partners | ||||
≤4 [ref] | 289 | 1.00 | ||
≥5 | 701 | 2.13 | ** | 1.25–3.63 |
Birth prior to first abortion | ||||
No [ref] | 693 | 1.00 | ||
Yes | 291 | 0.12 | *** | 0.07–0.22 |
Age at last abortion (years) | ||||
<16 | 46 | 0.01 | ** | 0.00–0.18 |
16–17 | 139 | 0.12 | *** | 0.05–0.30 |
18–19 | 153 | 0.22 | *** | 0.10–0.50 |
20–24 [ref] | 282 | 1.00 | ||
25–29 | 207 | 2.49 | ** | 1.46–4.25 |
30–34 | 108 | 6.20 | *** | 3.12–12.3 |
35–39 | 63 | 7.53 | *** | 3.18–17.8 |
Constant | 1.45 | |||
–2 log likelihood | 643.29 | |||
df | 26 |
* p<0.05,
** p<0.01,
*** p<0.001.
CI, confidence interval; df, degrees of freedom; OR, odds ratio; ref, reference category.