Table 3. Unadjusted Scores at Baseline and Change from Baseline by Outcome Measure for Participants With (PG) and Without (CG) Prescriptions for Stimulant Medications.

	Baseline			Change from Baselineb
Measure	Comparison Group (CG) Mean (SD), n	Prescription Group (PG) Mean (SD), n	Between- group comparison (p-valuea)	Comparison Group (CG) Mean (SD), n	Prescription Group (PG) Mean (SD), n	Between- group comparison (p-valuea)
Wechsler IQ Scores
Verbal Scale (VIQ)	85.7 (15.6), 158	83.3 (15.7), 54	0.33	-0.2 (9.4), 158	2.5 (11.0), 54	0.10
Performance Scale (PIQ)	88.9 (17.2), 158	88.1 (14.5), 54	0.77	-0.9 (9.8), 158	2.8 (10.8), 54	0.03
CPRS-48 Scale Scores
Anxiety	48.7 (8.1), 145	50.9 (12.2), 49	0.25	0.2 (8.7), 145	-2.0 (15.0), 49	0.29
Conduct Problem	49.1 (12.0), 145	56.4 (17.2), 49	0.003	-1.2 (11.4), 145	-2.5 (15.8), 49	0.58
Hyperactivity Index	50.4 (13.4), 145	61.4 (16.8), 49	<0.001	-0.9 (12.4), 145	1.4 (17.9), 49	0.36
Impulsive-Hyperactive	50.0 (12.0), 145	60.7 (14.3), 49	<0.001	-1.4 (11.7), 145	-1.6 (16.3), 49	0.94
Learning Problem	52.8 (15.4), 145	63.0 (16.9), 49	<0.001	0.2 (13.5), 145	4.7 (19.8), 49	0.12
Psychosomatic	54.3 (14.6), 145	54.7 (15.8), 49	0.88	0.3 (14.8), 145	0.4 (18.8), 49	0.97
QOL Domain Scores
General Health Perception	84.8 (16.0), 378	79.4 (17.4), 131	0.002	1.4 (19.0), 378	-0.8 (22.0), 131	0.31
Health Care Utilization	95.4 (6.9), 380	95.0 (6.2), 131	0.56	0.4 (8.3), 380	0.4 (8.0), 131	0.91
Social/School Functioning	90.2 (11.5), 377	90.3 (12.1), 130	0.97	-0.4 (12.9), 377	0.2 (11.3), 130	0.59
Behavior Problems Index	82.9 (13.6), 357	69.1 (21.6), 124	<0.001	0.6 (12.5), 357	0.3 (17.8), 124	0.88

^aEstimated using unadjusted generalized estimating equation models.

^bMean changes from baseline in Wechsler IQ scores, CPRS-48 scale scores, and QOL domain scores were not significantly different from zero in either the Prescription or Comparison groups, using one-sample t-tests.