Table 4.

Assessment of the effect of drain insertion on complications

Variables	Drain	No Drain	95 %( CI )	P-value
Pain scores
1st postoperative day	5.71(2.37)	2.53(2.23)	−3.18(−4.30 – −2.05)	<0.001†
(mean SD)
7th postoperative day	0.29(1.03)	0.09(0.51)	−0.21(−0.60)	0.30†
			×2(df)
< 24hours
Change voice
Yes	4(67)	2(33)	0.73(1)	0.39X
No	30(48.39)	32(52)
Hematoma
Yes	0(50)	0(50)	1.00(1)	1.00X
No	34(50)	34(50)
Laryngeal edema
Yes	2(50)	2(50)	0.00(1)	1.00X
No	32(50)	32(50)
>24hours to discharge
Hematoma
Yes	1(100)	0(0)	1.05(1)	0.31X
No	33(48)	34(52)
Seroma
Yes	3(60.0)	2(40)	0.22(1)	0.64X
No	31(49)	32(51)

^†t-test, ^XChi-square test