Table 2.

Summary of clinical and molecular data for six Chinese families carrying the C1494T mutation

Pedigree	Number of matrilineal relatives	aPenetrance (including the use of drugs) (%)	Penetrance (excluding the use of drugs) (%)	mtDNA haplogroup
WZD101	39	28.2	20.5	F1a1
WZD102	30	20	13.3	F1a1
WZD103	13	15.4	7.7	D5a2a
bBJ1	40	51	31	D
cBJ2	9	77.8	22.2	R
dBJ3	65	23.1	20	F1

^aaffected matrilineal relatives/total affected matrilineal relatives

^bZhao et al. 2004a;

^cWang et al. 2006;

^dHan et al. 2007;