Table 6.

Heart Rate by Cumulative Stimulant Dose

Time (months)	Stimulant Category	Current Medication Use	Number of Subjects	Mean	Standard Deviation	Controlled for current medication use
						No	Yes
36	No Medication	NoMed	57	77.8	10.6
	CUM ≤ 7,898	NoMed	39	77.6	13.8
		Med	9	80.7	12.4
	7,898 < CUM ≤43,460	NoMed	75	77.1	11.7
		Med	133	78.9	11.9
	CUM > 43,460	NoMed	7	78.7	12.1
		Med	32	84.4	10.7
	LNCG		199	76.1	11.8
						p=.019	p=.084
96	No Medication	NoMed	50	66.4	8.7
	CUM ≤7,898	NoMed	32	69.6	13.4
		Med	1	74.0
	7,898 < CUM ≤43,460	NoMed	106	69.3	12.5
		Med	9	77.1	10.8
	CUM > 43,460	NoMed	128	70.4	11.7
		Med	51	76.2	11.6
	LNCG		233	67.9	10.4
						P<.001	p<.001
120	No Medication	NoMed	50	68.9	11.0
	CUM ≤ 7,898	NoMed	26	70.2	14.7
		Med	0
	7,898 < CUM ≤43,460	NoMed	98	68.1	11.3
		Med	2	82.0	5.7
	CUM > 43,460	NoMed	145	70.7	12.7
		Med	24	73.7	11.1
	LNCG		212	67.7	10.4
						p=.122	p=.144

CUM: cumulative stimulant dose in methylphenidate equivalent mg.

LNCG: local normative comparison group (not selected for ADHD and not medicated).