Table 5.

Percentage of SDQ Cut Scores at 80th (Borderline) and 90th (Abnormal) Percentiles across Samples

	Sample-specific Cut-off Scores				NHIS Both Parent Sample Cut-off Scores
	80th Percentile		90th Percentile		80th Percentile		90th Percentile
SDQ Subscales	Score Range	%	Score Range	%	Score Range	%	Score Range	%
Survey Sample (N=509)
Peer	4	10.6	≥5	17	2	18.7	≥3	40.9
Emotional	5	7.9	≥6	13.4	2–3	26.7	≥4	30.5
Hyperactive	8	7.9	≥9	13.8	5	10.2	≥6	36.3
Conduct	5	6.3	>6	14.1	2	18.5	>3	43
Total Difficulties	19–22	10.1	≥23	12.1	10–13	16.8	≥14	38.9
Prosocial	5	6.3	<4	7.9	7	13.6	<6	24.4
RCT Sample (N=323)
Peer	4	12.1	≥5	18.6	2	16.7	≥3	47.4
Emotional	5	9.6	>6	18.6	2–3	27.6	>4	39.9
Hyperactive	9	11.8	10	11.5	5	13	≥6	47.7
Conduct	5–6	13.9	≥7	10.8	2	18	≥3	52
Total Difficulties	22–25	10.0	≥26	11.1	10–13	18.5	≥14	49.2
Prosocial	5	6.5	≤4	6.8	7	13.3	≤6	23.2
NHIS NP Sample (N=184)
Peer	3	9.2	>4	16.8	2	16.8	>3	26.1
Emotional	3–4	14.7	≥5	13.0	2–3	22.3	≥4	17.9
Hyperactive	6–7	9.8	≥8	15.8	5	10.3	≥6	22.3
Conduct	3	13.0	>4	13.6	2	13.0	>3	26.6
Total Difficulties	13–18	12.4	>19	10.3	10–13	17.4	>14	18.5
Prosocial	7–6	11.6	≤5	5.4	7	7.6	≤6	17.9
NHIS OP Sample (N=1618)
Peer	3	9.3	≥4	12.8	2	19.6	≥3	22.1
Emotional	3	8.5	>4	16.0	2–3	22.3	>4	16.0
Hyperactive	5–6	13.2	≥7	13.4	5	7.2	≥6	19.5
Conduct	3	7.7	>4	13.9	2	15.3	>3	21.6
Total Difficulties	12–17	11.6	≥18	10.2	10–13	12.3	≥14	16.9
Prosocial	7–6	13.2	<5	6.1	7	8.3	<6	10.9