Moray House test scores at age 11 and age 80 by smoking status
| n | IQ age 11 (SD) | IQ age 80 (SD) | |
|---|---|---|---|
| Scores were converted to IQ-type scores (mean = 100; SD = 15) at each age separately. | |||
| Never smoked | 205 | 101.6 (13.8) | 100.8 (14.5) |
| Ex-smoker | 231 | 99.8 (15.2) | 100.3 (14.1) |
| Current smoker | 34 | 98.4 (15.5) | 94.3 (17.5) |