Table 4. Prevalence of GJB2, GJB3, GJB6, and SLC26A4 genes and mtDNA 12SrRNA A1555G mutation in the Chinese population.

Different areas of China	Patients (n)	Frequency of pathologic variants(%)					References
		12SrRNA A1555G	GJB2	GJB3	GJB6	SLC26A4
Northern China	743	2.92	18.12	-	-	18.15	Yu Fei et al.2006[25]
							Liu Xin et al.2006[26]
							Song RD et al.2007[27]
							Zhu QW et al.2007[28]
							Zhu YH et al.2008[29]
Northeastern China	377	1.00	20.80	-	-	-	Yu Fei et al.2006[25]
							Liu Xin et al.2006[26]
							Chen JX et al.2007[30]
							Wang Ping et al.2001[31]
Eastern China	135	1.50	35.55	0	3.70	15.56	This study
Southern China	404	2.70	10.80	-	-	-	Yu Fei et al.2006[25]
							Liu Xin et al.2006[26]
Northwestern China	1639	4.10	17.61	2.20	0	12.85	Dai Pu et al.2006[32]
							Guan Jing et al.2006[33]
							Yu Fei et al.2006[25]
							Liu Xin et al.2006[26]
							Yuan YY et al.2008[34]
							Guo YF et al.2008[35]
							Du RL et al.2009[36]
Southeastern China	140	-	40.00	-	-	-	Wang SH et al.2009[37]
Others	533	-	20.70	3.70	0.30	12.38	Li QZ et al.2005[38]
							Han DY et al.2006[39]
							Li Qi et al.2007[40]
							Yuan YY et al.2007[41]
							Sun Qing et al.2008[18]
Average value		2.44	23.37	1.97	1.33	14.74	43.57% (total)