The high frequency of GJB2 gene mutation c.313_326del14 suggests its possible origin in ancestors of Lithuanian population

Table 5 Distribution of HL severity of GJB2(−) and GJB2(+) subgroups

	Profound HL	Severe HL	Moderate HL	Mild HL	Total
GJB2 (−)	20	12	19	6	57
GJB2 (+)	57	10	11	6	84
Total	77	22	30	12	141
Pearson Chi-Square 15.5			p = 0.001
Empirical effect size w = 0.7			Empirical power = 1.0

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