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. Author manuscript; available in PMC: 2014 Jul 15.

Published in final edited form as: Biol Psychiatry. 2012 Dec 27;74(2):84–89. doi: 10.1016/j.biopsych.2012.11.010

Table 2. Gene Frequencies.

	ADHD (n = 34)		Control (n = 36)		Statistic

Gene	n	%	n	%	χ²	p
SLC6A3_Utr3′	18	53%	15	44%	.53	NS
SLC6A3_In8′	7^a	54%	9^b	47%	.13	NS
DRD4	10^c	30%	10^d	32%	.03	NS
SLC6A4_In	8^e	35%	11^f	39%	.11	NS
SLC6A4_Pr	8^g	35%	11^h	41%	.19	NS

ADHD, attention-deficit/hyperactivity disorder; NS, not significant.

^a

Denominator = 13.

^b

Denominator = 19.

^c

Denominator = 33.

^d

Denominator = 31.

^e

Denominator = 23.

^f

Denominator = 28.

^g

Denominator = 23.

^h

Denominator = 27.