A summary of the variables and precise outcomes in the analyses
| School level factors | Individual level factors |
|---|---|
| Aircraft noise exposure | English performance score |
| Percentage of pupils eligible for a free school meal | English sub-tests: spelling (test 1); handwriting (test 2); creative writing (test 3); reading (test 4). |
| Percentage of pupils statemented with special needs | Mathematics performance score |
| Percentage of pupils with English as a second language | Science performance score |
| Type of school (government, church, grant maitained) | Sex |
| Year of testing (1996 or 1997) | |
| Date of birth (only for 1997 sample) |