Vitamin D receptor gene polymorphisms are associated with triceps skin fold thickness and body fat percentage but not with body mass index or waist circumference in Han Chinese

Table 3 GMDR models of gene-gene interactions on body fat percentage and triceps skin fold thickness

Models	TBA1	TBA2	CVC	P _sign
Gene-gene interaction for body fat percentage^a
ApaI	0.569	0.511	6/10	0.172
FokI, ApaI	0.602	0.524	6/10	0.055
FokI, ApaI, rs2239179	0.632	0.575	10/10	0.010
FokI, ApaI, rs2239179, rs2189480	0.657	0.553	10/10	0.055
Gene-gene interaction for triceps skin fold thickness^a
ApaI	0.593	0.595	10/10	0.001
FokI, ApaI	0.607	0.525	5/10	0.055
FokI, ApaI, rs2189480	0.643	0.578	6/10	0.001
FokI, ApaI rs2239179, rs2189480	0.655	0.541	10/10	0.001

GMDR Generalized multifactor dimensionality reduction, TBA1 Training balanced accuracy, TBA2 Testing balanced accuracy, CVC Cross-validation consistency. P _sign = P value from sign test. ^a Adjusted for age, sex, alcohol, high-fat diet and the family history of obesity

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