The effect of MAOA activity on antisocial behaviour depends on childhood history of maltreatment (p = 0.01 for interaction)11
| Childhood maltreatment status | Increase in standardised antisocial behaviour score among subjects with low MAOA activity levels compared with other subjects* | p Value for change in behaviour score† |
|---|---|---|
| *The antisocial behaviour score has been standardised over the entire group of 442 subjects to have a mean of 0 and standard deviation of 1; †p values calculated using t tests | ||
| All subjects (n = 442) | 0.01 | p = 0.89 |
| None (64%) | −0.17 | p = 0.14 |
| Probable (28%) | 0.17 | p = 0.11 |
| Severe (8%) | 0.64 | p = 0.02 |