Table 2.
IQ and Educational Attainment Across Group as a Function of Childhood Maltreatment Exposurea
| Maltreatment Exposure | Unexposed M (SD) | Exposed M (SD) | t (df) | P |
|---|---|---|---|---|
| IQ | ||||
| Controls (N = 1283) | ||||
| Childhood maltreatment (1042 vs 241) | 103.96 (17.44) | 98.69 (17.86) | 4.21 (1281) | <.001 |
| Abuse (1055 vs 228) | 104.05 (17.65) | 98.01 (16.72) | 4.73 (1281) | <.001 |
| Neglect (1036 vs 247) | 103.97 (17.29) | 98.80 (18.49) | 4.17 (1281) | <.001 |
| FEP patients (N = 829) | ||||
| Childhood maltreatment (465 vs 364) | 86.34 (18.47) | 83.37 (17.69) | 2.35 (827) | .019 |
| Abuse (492 vs 337) | 85.33 (18.32) | 84.61 (17.99) | 0.56 (827) | .578 |
| Neglect (468 vs 361) | 86.21 (18.54) | 83.52 (17.62) | 2.11 (827) | .035 |
| EDUCATIONAL ATTAINMENT | ||||
| Controls (N = 1283) | ||||
| Childhood maltreatment (1042 vs 241) | 3.93 (1.42) | 3.59 (1.42) | 3.38 (1281) | .001 |
| Abuse (1055 vs 228) | 3.92 (1.42) | 3.64 (1.45) | 2.66 (1281) | .008 |
| Neglect (1036 vs 247) | 3.95 (1.41) | 3.52 (1.42) | 4.32 (1281) | <.001 |
| FEP patients (N = 829) | ||||
| Childhood maltreatment (465 vs 364) | 3.12 (1.41) | 2.80 (1.37) | 3.25 (827) | .001 |
| Abuse (492 vs 337) | 3.08 (1.38) | 2.82 (1.42) | 2.60 (827) | .010 |
| Neglect (468 vs 361) | 3.13 (1.45) | 2.78 (1.35) | 3.61 (827) | <.001 |
Note: df, degrees of freedom; FEP, first-episode psychosis; IQ, intelligence quotient; M, Mean; SD, Standard Deviation.
aDefined as mean Childhood Trauma Questionnaire score > 80th percentile of the control group.