Table 1. Means and standard deviations of BMI for each polymorphism, and main effects and post hoc comparisons of SNPs that showed significant main effects and were used in subsequent multiple regression analysis.

SNP	Subsystem	Gene	Maj	Mean	SD	n	Het	Mean	SD	n	Min	Mean	SD	n	F	p	mh	mm	hma	Gene bygenderinteractionF(p)
rs6651806	Degradation	MAOB	AA	20.63	2.45	381	AC	19.95	2.16	97	CC				6.32	0.01	b			0.40 (0.53)
rs5905512		MAOB	AA	20.76	2.62	284	AG	20.10	2.01	194	GG				9.02	<0.01	b			0.02 (0.89)
rs1018079	Transport	SLC18A1	AA	20.29	2.26	303	AG	20.72	2.32	156	GG	22.10	4.35	18	5.92	<0.01	0.07	<0.01	0.02	0.34 (0.71)
rs2270638		SLC18A1	AA	20.33	2.47	344	AG	20.92	2.20	133	GG				5.77	0.02	b			0.27 (0.60)
rs977003	Receptor	HTR2A	AA	20.29	2.30	299	AC	20.92	2.62	151	CC	20.40	2.19	28	3.45	0.03	0.01	0.82	0.29	0.14 (0.87)
rs2224721		HTR2A	CC	20.12	2.12	216	AC	20.79	2.61	209	AA	20.87	2.51	53	4.85	0.01	<0.01	0.04	0.82	0.13 (0.88)
rs2192371		HTR2C	AA	20.61	2.42	242	AG	19.79	1.80	124	GG	21.03	2.78	112	8.62	<0.01	<0.01	0.12	<0.01	0.95 (0.33)
rs6644065		HTR2C	AA	20.45	2.26	373	AG	20.05	2.81	68	GG	21.74	2.77	37	6.30	<0.01	0.21	<0.01	<0.01	6.06 (0.01)
rs4911871		HTR2C	AA	20.39	2.23	350	AG	20.17	2.74	76	GG	21.68	2.76	51	7.44	<0.01	0.47	<0.01	<0.01	1.09 (0.30)
rs11214769		HTR3B	AA	20.31	2.22	335	AG	20.88	2.85	124	GG	21.21	2.20	19	3.46	0.03	0.02	0.11	0.58	1.65 (0.19)
rs13166761		HTR4	GG	20.38	2.23	244	AG	20.79	2.64	202	AA	19.48	1.81	32	4.74	0.01	0.07	0.05	<0.01	0.54 (0.59)
rs7904569		HTR7	AA	20.50	2.38	206	AG	20.69	2.53	215	GG	19.72	1.85	57	3.64	0.03	0.43	0.03	0.01	1.34 (0.26)

Note: Empty cells mean no such genotypes were found in our sample. Maj: Major allele; Het: Heterozygote; Min: Minor allele.

^aResults (p values) of post hoc comparisons. mh = Maj versus Het, mm = Maj versus Min, hm = Het versus Min.

^bPost hoc comparison was not run because there were only 2 groups for this locus.