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. 2015 Oct 15;8(10):18265–18274.

Table 1.

Preoperative, postoperative subjective assessment of laser and conventional group (vocal cord polyp) (x̅±s)

	Laser group				Cold instruments group

Time	G	R	B	VHI	G	R	B	VHI
Before surgery	2.3±0.4	2.4±0.4	2.3±0.5	33.5±15.2	2.4±0.5	2.3±0.6	2.3±0.3	33.8±19.2
After surgery 1 week	2.1±0.6	2.0±0.3^Δ	1.8±0.4	25.3±6.2^Δ	1.8±0.9^Δ	1.7±0.7^Δ	1.9±0.4	26.1±8.8^Δ
After surgery 1 month	1.3±0.5^※	1.6±0.5^Δ	0.9±0.3^※	17.7±2.3^※	1.2±0.5^※	1.4±0.5^Δ	1.0±0.3^※	16.2±2.3^※
After surgery 3 months	1.0±0.4^※	1.1±0.5^※	0.6±0.1^※	9.4±6.0^※	1.1±0.5^※	1.1±0.5^※	0.6±0.2^※	10.4±6.7^※
P value	0.001	0.044	0.000	0.000	0.000	0.026	0.000	0.000

Note: Compared with the preoperative

^Δ

P < 0.05;

^※

P < 0.01.