Table 1.
Descriptive statistics comparing high, medium, and low ADHD PGS groups
| ADHD PGS Groups (low, medium and high) | |||||
|---|---|---|---|---|---|
| Low(n=1,181) | Medium(n=2,360) | High(n=1,181) | F or Chi-square | p-value | |
| ADHD symptoms (M, SD) | 2.78(sd=3.38) | 3.22(sd=3.62) | 3.45(sd=3.89) | F(2, 4719)=10.39 | <.001 |
| Psychological neglect (%) | 83(7.52%) | 187(8.37%) | 77(6.87%) | χ2=2.50 | .287 |
| Physical neglect (%) | 48(4.21%) | 123(5.39%) | 75(6.56%) | χ2=6.19 | .045 |
| Physical abuse (%) | 135(11.89%) | 328(14.37%) | 180(15.73%) | χ2=7.22 | .027 |
| Sexual abuse (%) | 44(3.83%) | 90(3.91%) | 60(5.19%) | χ2=3.66 | .160 |
| Psychological abuse (%) | 123(10.46%) | 324(13.90%) | 167(14.29%) | χ2=9.93 | .007 |
| Parental education (0–9) | 6.010(sd=2.12) | 5.810(sd=2.12) | 5.670(sd=2.14) | F(2,4260)=6.91 | .001 |
| Less than HS (0–3) | 90(7.62%) | 208(8.81%) | 120(10.16%) | - | - |
| HS (4–5) | 319(27.01%) | 684(28.98%) | 371(31.41%) | - | - |
| Some college (6–7) | 338(28.62%) | 698(29.58%) | 331(28.03%) | - | - |
| College + (8–9) | 325(27.52%) | 522(22.12%) | 257(21.76%) | - | - |
| Household income (in thousands) | 53.90(sd=48.42) | 53.06(sd=56.17) | 49.93(sd=48.17) | F(2,4230)=.23 | .797 |
| Age | 15.99(sd=1.39) | 16.04(sd=1.38) | 15.97(sd=1.40) | F(2,4719)=.65 | .520 |
| # Female (%) | 628(53.17%) | 1276(54.07%) | 660(55.88%) | χ2=1.85 | .397 |
F-statistics were computed from a one-way ANOVA for continuous outcomes; Pearson Chi-squared tests (df=2) were conducted for binary outcomes