Table 3 Number of GCSE passes (grade A*–C) for index cases and controls according to the type of school attended.
| School type | Pupil group | Number of passes (A*‐C) | ||||
|---|---|---|---|---|---|---|
| 0‡ | 1–4‡ | 5–10‡ | >10‡ | Mean (SD) | ||
| Comprehensive | Index (385) | 86 (22.3) | 98 (25.5) | 168 (43.7) | 33 (8.5) | 5.05 (4.1)* |
| Control (232) | 19 (8.2) | 40 (17.2) | 149 (64.2) | 24 (10.4) | 6.88 (3.5) | |
| Grammar | Index (14) | 2 (14.3) | 1 (7.1) | 8 (57.2) | 3 (21.4) | 8.00 (3.9) † |
| Control (24) | 0 | 1 (4.2) | 13 (54.2) | 10 (41.6) | 9.79 (1.7) | |
| Independent | Index (25) | 0 | 1 (4.0) | 20 (80.0) | 4 (16.0) | 9.04 (1.8) † |
| Control (32) | 0 | 0 | 27 (84.4) | 5 (15.6) | 9.34 (1.3) | |
| Special | Index (36) | 29 (80.5) | 5 (14.0) | 2 (5.5) | 0 | |
| Control (0) | – | – | – | – | ||
*Significant difference in means: p<0.0001 (t test); †difference in means: not significant; ‡results are shown as No (%) of pupils.