| Cognitive Testing |  |  | ||
---|---|---|---|---|---|
Not included N = 1356 | Included N = 161 | ||||
 | N (%) | N (%) | χ2 | df | p-value |
Sex | |||||
 Male | 627 (49.6) | 90 (55.9) | 2.31 | 1 | 0.13 |
 Female | 684 (50.4) | 71 (44.1) |  |  |  |
Income | |||||
 up to $1000 | 629 (51.6) | 49 (40.2) | 7.43 | 2 | 0.023 |
 $1000-$2000 | 448 (36.8) | 51 (41.8) |  |  |  |
 more than $2000 | 141 (11.6) | 22 (18.0) |  |  |  |
Father education | |||||
 Elementary or less | 319 (23.8) | 23 (14.7) | 6.48 | 2 | 0.03 |
 High school or less | 815 (60.8) | 106 (67.9) |  |  |  |
 University or more | 207 (15.4) | 27 (17.3) |  |  |  |
Mother education | |||||
 Elementary or less | 182 (13.5) | 18 (11.3) | 0.77 | 2 | 0.68 |
 High school or less | 923 (68.7) | 111 (69.4) |  |  |  |
 University or more | 239 (17.8) | 31 (19.4) |  |  |  |
Father employment | |||||
 Employed | 1236 (91.2) | 148 (91.9) | - | - | - |
Mother employment | |||||
 Unemployed | 971 (72.2) | 113 (71.1) | 0.08 | 1 | 0.77 |
 Employed | 374 (27.8) | 46 (28.9) |  |  |  |
Any chronic physical illnessa | 116 (8.6) | 13 (8.1) | 0.04 | 1 | 0.88 |
 | Mean ± SD | Mean ± SD | t-test | df | p-value |
Age | 10.53 ± 3.28 | 10.82 ± 3.18 | -1.04 | 1515 | 0.29 |
SDQ emotional Childb | 1.94 ± 2.11 | 1.53 ± 1.64 | 1.78 | 92.23 | 0.07 |
SDQ emotional Parentc | 1.80 ± 1.96 | 1.50 ± 1.78 | 1.94 | 208.79 | 0.053 |
SDQ hyperactivity Childb | 2.77 ± 2.15 | 2.72 ± 1.85 | 0.18 | 557 | 0.85 |
SDQ hyperactivity Parentc | 3.30 ± 2.35 | 2.98 ± 2.36 | 1.62 | 1515 | 0.10 |
MFQ Childd | 6.17 ± 7.93 | 4.62 ± 7.55 | 2.29 | 181.93 | 0.02 |
MFQ Parentd | 4.72 ± 7.09 | 2.79 ± 3.73 | 5.12 | 288.61 | 0.00 |
SCARED Childd | 13.78 ± 12.39 | 12.46 ± 10.26 | 1.40 | 196 | 0.16 |
SCARED Parentd | 10.27 ± 10.26 | 10.95 ± 8.57 | -0.29 | 195.02 | 0.76 |