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Estimated effect of attending a selective secondary school on confounding variables
| Effect size | 95% CI | p value | n | Bandwidth | |
|---|---|---|---|---|---|
| IQ age 9 | −0.14 | (− 1.49 to 1.21) | 0.84 | 3441 | 77 |
| Boy | −0.01 | (− 0.08 to 0.06) | 0.82 | 4330 | 111 |
| Father non-manual occupation | 0.02 | (− 0.05 to 0.09) | 0.63 | 3570 | 79 |
| Linked to NHS records | 0.00 | (− 0.03 to 0.03) | 0.93 | 4892 | 163 |
