Table 1:
Demographic Characteristics of the ABCD Sample
| Full Sample (N=11876) | OCD Absent (n=10584) | OCD Present (n=1099) | Group Difference | p | Effect Size | |
|---|---|---|---|---|---|---|
| Age | 118.94 (7.46) | 118.97 (7.47) | 118.61 (7.36) | t=−1.55 | .12 | d=−0.05 |
| Sex (F) *** | 5681 (47.86%) | 5138 (48.56%) | 440 (40.11%) | χ2=28.13 | <.001 | OR=0.71 |
| Pubertal Status | 1.68 (0.72) | 1.68 (0.72) | 1.69 (0.75) | t=0.38 | .70 | d=0.01 |
| Race-White | 8803 (74.13%) | 7879 (74.44%) | 789 (71.79%) | χ2=3.51 | .06 | OR=0.87 |
| Race-Black *** | 2515 (21.18%) | 2186 (20.65%) | 293 (26.66%) | χ2=21.13 | <.001 | OR=1.40 |
| Hispanic | 9308 (79.44%) | 8312 (79.59%) | 863 (79.69%) | χ2=0.00 | .97 | OR=1.01 |
| Parents Marital Status (together/married) *** | 8679 (73.69%) | 7822 (74.5%) | 732 (67.47%) | χ2=24.79 | <.001 | OR=0.71 |
| Parental Education (completed some college) *** | 9812 (82.77%) | 8818 (83.45%) | 850 (77.55%) | χ2=23.91 | <.001 | OR=0.69 |
| Parental Income *** | 7.22 (2.42) | 7.31 (2.37) | 6.45 (2.76) | t=−9.33 | <.001 | d=−0.33 |
| NIH Toolbox - Cognition Total *** | 100.37 (17.96) | 100.7 (17.89) | 97.3 (18.48) | t=−5.68 | <.001 | d=−0.19 |
| Height (inches) | 55.26 (3.22) | 55.27 (3.21) | 55.13 (3.36) | t=−1.31 | .19 | d=−0.04 |
| Parental Monitoring *** | 4.38 (0.52) | 4.39 (0.51) | 4.3 (0.57) | t=−5.28 | <.001 | d=−0.18 |
| Parent 1 Acceptance ** | 2.78 (0.3) | 2.78 (0.3) | 2.75 (0.33) | t=−2.88 | .004 | d=−0.10 |
| Parent 2 Acceptance ** | 2.69 (0.39) | 2.69 (0.38) | 2.65 (0.42) | t=−2.79 | .01 | d=−0.10 |
| Family Conflict - Child Report *** | 2.05 (1.95) | 2.02 (1.94) | 2.27 (2.03) | t=3.92 | <.001 | d=0.13 |
| Family Conflict – Parent Report *** | 2.54 (1.96) | 2.47 (1.93) | 3.12 (2.09) | t=9.93 | <.001 | d=0.33 |
| Usable Structural Data | 10534 (88.7%) | 9405 (88.86%) | 962 (87.53%) | χ2=1.62 | .20 | OR=0.88 |
| CBCL OCS sum *** | 1.34 (1.82) | 1.13 (1.56) | 3.41 (2.66) | t=27.84 | <.001 | d=1.04 |
| CBCL OCS T-score *** | 53.70 (6.12) | 52.97 (5.2) | 60.69 (9.22) | t=27.27 | <.001 | d=1.03 |
Note. Demographic characteristics of the sample are summarized here for the full ABCD baseline sample and split by the presence/absence of a lifetime K-SADS OCD diagnosis. Continuous and categorical variables are characterized respectively by mean and (standard deviation) or N and (percent) with group differences based on OCD diagnosis presence are compared by t-test (Cohen’s d effect size) or chi-squared test (odds ratio [OR] effect size). Pubertal status range=1–4. Income range=1–10. Conflict score range=0–9. Monitoring score range=1–5. Acceptance score range=1–3.
N=193 missing K-SADS OCD diagnosis. Additionally, n=1 missing Age, n=7 missing Sex, n=1 missing Pubertal Status and Race, n=159 missing ethnicity, n=99 missing Parents Marital Status, n=21 missing Parental Education, n=1019 missing Parental Income, n=413 missing NIH Toolbox - Cognition Total, n=13 missing height, n=24 missing parental monitoring behavior, n=37 missing parent 1 acceptance behavior, n=919 missing parent 2 acceptance behavior, n=27 missing family conflict - child report, n=6 missing family conflict - parent report, n=8 missing CBCL OCS sum, n=9 missing CBCL OCS T-score.
Group difference:
p<.05,
p<.01,
p<.001