Table 4.

Age- and sex-matched groups for the subanalysis

BDNF genotyping	Age (y)	Sex	Race	Distance (mm)	rMT (%MSO)	SI (%MSO)	SI/rMT	MEP amplitude (mV)
								Mean	SD	Median
Val/Val	23	F	AA	16.5	43	57	132.56	1.33	0.52	1.25
Val/Val	22	M	Mix	18.3	35	44	125.71	0.86	0.27	0.82
Val/Val	21	M	AA	21.5	56	66	117.86	1.52	0.96	1.15
Val/Val	22	M	NA	20.6	42	49	116.67	1.10	0.46	1.04
Val/Val	45	M	AA	20.4	51	56	109.80	0.84	0.77	0.49
Val/Val	28	M	Cau	17.6	48	61	127.08	0.90	0.34	0.93
Val/Val	22	F	AA	18.5	49	57	116.33	0.72	0.32	0.72
Val/Val	26	M	Cau	14.1	38	42	110.53	0.83	0.49	0.74
Val/Val	25	F	AA	20.2	52	57	109.62	1.21	0.66	1.05
Val/Val	22	M	Cau	17.0	51	56	109.80	1.21	0.79	0.91
Val/Met	26	M	Asi	18.5	45	52	115.56	0.57	0.43	0.56
Val/Met	39	F	Cau	14.0	31	47	151.61	0.52	0.19	0.47
Val/Met	35	M	Cau	18.0	30	32	106.67	0.48	0.33	0.43
Val/Met	19	M	Asi	16.9	49	53	108.16	0.69	0.45	0.72
Val/Met	21	F	AA	22.1	42	56	133.33	1.06	0.71	0.98
Val/Met	33	M	Cau	20.7	42	54	128.57	0.46	0.33	0.33
Val/Met	19	M	Cau	14.8	49	64	130.61	1.40	0.81	1.28
Val/Met	22	F	Asi	17.6	41	46	112.20	0.78	0.31	0.74
Val/Met	21	M	Cau	13.5	53	56	105.66	0.70	0.43	0.45
Val/Met	22	M	Cau	22.8	46	52	113.04	0.76	0.51	0.96
Val/Val
Mean	25.6	3F		18.5	46.5	54.5	117.6	1.05
SD	7.2			2.3	6.7	7.4	8.3	0.26
Val/Met
Mean	25.7	3F		17.9	42.8	51.2	120.5	0.74
SD	7.3			3.2	7.5	8.4	15.0	0.29
p-values	n.s.			n.s.	0.271	0.210	n.s.	0.009

MSO = maximum stimulator output; AA = African-American; Cau = Caucasian; Asi = Asian; Distance = scalp-to-coil distance in millimeters (mm)