. Author manuscript; available in PMC: 2009 Oct 5.

Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2008 Oct 5;147B(7):1205–1212. doi: 10.1002/ajmg.b.30754

Table 3.

Relationship between the BDNF Val66Met polymorphism and social support measures

Social Support Scale	Val/Val Genotype (N = 233)	Met allele Carriers (N = 125)	df	Test statistic	p value
Subjective
• Log	3.21 (0.15)	3.14 (0.23)	176	t = 2.70	0.0076
• Unadjusted	24.92 (2.61)	23.72 (4.53)
Instrumental
• Log	2.26 (0.23)	2.21 (0.28)	216	t = 1.51	0.1335
• Unadjusted	9.76 (1.74)	9.43 (2.02)
Social Interactions
• Log	1.87 (0.47)	1.73 (0.50)	346	t = 2.53	0.0119
• Unadjusted	7.02 (2.80)	6.16 (2.69)
Social Network
• Log	0.68 (0.68)	0.61 (0.65)	252	t = 0.81	0.4212
• Unadjusted	1.81 (2.01)	1.66 (1.88)

Social support scale scores, both log-transformed and unadjusted, presented as mean (standard deviation). Group comparisons were only performed on the log-transformed data as the unadjusted data were not normally distributed; these comparisons used two-tailed, pooled t-tests, or with the Satterthwaite t-test for unequal variances.