Table 4.

Comparison of recurrent laryngeal nerve injury between the two groups [n (%)]

Index		Observation group	Control group	χ2	P
Case (n)		55	55
Recurrent laryngeal nerve injury	Temporary recurrent laryngeal nerve injury	2 (3.64)	12 (21.82)	7.682	<0.001
	Permanent recurrent laryngeal nerve injury	1 (1.82)	7 (12.73)	2.914	<0.001
	Unilateral injury	2 (3.64)	14 (25.45)	17.260	<0.001
	Bilateral injury	1 (1.82)	5 (9.09)	21.993	<0.001