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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Gend Med. 2012 Mar 23;9(2):112–120. doi: 10.1016/j.genm.2012.02.005

Table 2.

Days with methamphetamine (MA) use in the past 30 among MA dependent participants by sex and BDNF Val66Met genotype

Days with MA Use, mean (S.D.) t d.f. p value
Males (N = 44) 11.5 (10.3) -3.5 58 0.001
Females (N = 16) 22.0 (10.0)
Males *
 Val/Val (N = 32) 9.8 (9.8) -1.9 42 0.064
 Val/Met (N = 10) 16.4 (11.1)
 Met/Met (N = 2) 15.0 (7.1)
Females *
 Val/Val (N = 8) 27.1 (5.8) 2.3 14 0.036
 Val/Met (N = 8) 16.9 (11.0)
 Met/Met (N = 0) N/A
*

Note: means are shown for each genotype but analyses were performed with Val/Met and Met/Met groups collapsed due to small number of Met/Met genotype.