Table 7.
Percentages (numbers*) of pupils in secondary outcomes at baseline and at six months' follow up
|
Baseline
|
Follow up
|
Weighted regression analysis of difference between groups†
|
||||||
|---|---|---|---|---|---|---|---|---|
| Intervention | Control | Intervention | Control | Difference (%) | 95% CI | |||
| Pupils knowing correct time limit for use of the intrauterine device as emergency contraception | ||||||||
| Boys | 2.2 (17/783) | 3.7 (31/845) | 7.1 (54/756) | 3.5 (29/836) | 4.2 | 0.7 to 7.7 (P=0.02) | ||
| Girls | 4.6 (33/724) | 5.1 (41/802) | 21.1 (150/711) | 9.9 (74/751) | 10.7 | 0.4 to 21.0 (P=0.04) | ||
| Pupils who were not virgins | ||||||||
| Boys | 19.1 (149/781) | 19.3 (158/819) | 26.6 (198/744) | 26.0 (212/816) | −0.3 | −6.2 to 5.6 (P=0.9) | ||
| Girls | 20.5 (148/722) | 23.0 (184/800) | 28.5 (199/699) | 29.5 (240/747) | 0.8 | −7.2 to 8.7 (P=0.8) | ||
| Pupils who were not virgins who said they had used emergency contraception | ||||||||
| Boys‡ | 18.8 (27/144) | 24.2 (36/149) | 20.1 (38/189) | 15.6 (33/211) | −0.1 | −8.9 to 8.7 (P=1.0) | ||
| Girls | 29.0 (42/145) | 29.1 (51/175) | 32.3 (63/195) | 35.9 (79/220) | −8.0 | −20.8 to 4.7 (P=0.2) | ||
| Pupils intending to use emergency contraception in the future when contraception not used during intercourse§ | ||||||||
| Boys | N/A | N/A | 83.1 (629/757) | 83.7 (689/823) | N/A | N/A | ||
| Girls | N/A | N/A | 87.6 (621/709) | 86.9 (652/750) | N/A | N/A | ||
*
Denominators exclude pupils not responding to that question.
†
Weighted for schools rather than individuals, using methods described by Donner and Klar,17 and adjusted for baseline results, percentage of pupils entitled to free school meals, size of year group, whether sex education was taught by a tutor or a specialised team of teachers, and whether sex education was taught mainly in year 9 or 10.
‡
Boys' responses are likely to be less reliable than the girls', as girls will have accessed emergency contraception themselves.
§
Question not asked at baseline.