Table 1.
Basic Sociodemographic, Educational, and Clinical Characteristics of the Study Sample
| Entire Sample (n = 100) | Non-APS (n = 88) | APS (n = 12) | Significance Test | |
|---|---|---|---|---|
| Mean (S.D.) age (y) | 14.0 (0.9) | 14.0 (0.9) | 13.9 (0.7) | t(98) = −0.35, P = .73 |
| Gender (% male) | 37.0 | 40.0 | 16.7 | χ2(1) = 2.4, P = .11 |
| Place of birth (% Israel) | 97.0 | 96.6 | 100.0 | χ2(1) = 0.38, P = .54 |
| Religion (% Jewish) | 94.0 | 94.3 | 91.6 | χ2(1) = 0.13, P = .72 |
| Father’s place of birth (% Israel) | 66.0 | 63.6 | 83.3 | χ2(1) = 1.8, P = .18 |
| Mother’s place of birth (% Israel) | 66.0 | 63.6 | 83.3 | χ2(1) = 1.8, P = .18 |
| Mean (S.D.) father’s years of education | 14.8 (3.0) | 14.9 (3.0) | 13.8 (2.8) | t(96) = −1.2, P = .25 |
| Mean (S.D.) mother’s years of education | 15.2 (2.7) | 15.2 (2.8) | 15.2 (1.8) | t(97) = −0.8, P = .93 |
| Mean (S.D.) SDQ self report | 10.1 (5.2) | 9.7 (5.4) | 13.1 (2.6) | t(98) = 3.6, P = .001 |
| Mean (S.D.) SDQ parent report | 8.4 (5.1) | 7.9 (5.5) | 11.6 (5.0) | t(98) = 2.4, P = .02 |
| Family history of psychosis (% yes) | 8.0 | 7.9 | 8.3 | χ2(2) = 0.002, P = .96 |
| History of traumatic events (% yes) | 38.0 | 37.5 | 41.7 | χ2(2) = 0.08, P = .78 |
| Any Axis I disordera (% yes) | 27.0 | 25.0 | 41.7 | χ2(2) = 1.5, P = .22 |
| Axis I anxiety disordera (% yes) | 8.0 | 6.8 | 16.7 | χ2(2) = 1.4, P = .23 |
| Axis I mood disordera (% yes) | 7.0 | 4.5 | 25.0 | χ2(2) = 6.8, P = .009 |
| Axis I ADHDa (% yes) | 13.0 | 12.5 | 16.7 | χ2(2) = 0.16, P = .69 |
Note: APS, Attenuated Psychotic Symptoms; ADHD, Attention Deficit Hyperactivity Disorder; SDQ, Strengths and Difficulties Questionnaire.
aBased on the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS).