Meta-Analysis of Low Temperature Plasma Radiofrequency Ablation and CO₂ Laser Surgery on Early Glottic Laryngeal Carcinoma

Table 6

Results of meta-analysis of operation time.

Study or subgroup	Radio frequency group		Laser group		Weight	Odds ratio, -, fixed, 95% CI
		Total		Total
Semmler et al.		93		93	11.23%	-2.09 [-2.33, -1.79]
Liu Jianyong et al.		42		42	10.32%	-2.87 [-2.98, -1.09]
Shuang et al.		37		37	3.89%	-3.44 [-4.09, -2.41]
Mourad et al.		30		30	10.08%	22.87 [16.43, 0.81]
Jun et al.		47		46	10.67%	-1.82 [-0.24, -1.79]
Jinhui and Chengyu		64		64	10.59%	-1.23 [-0.24, -1.79]
Yuke et al.		52		52	10.49%	-1.82 [-2.44, -1.79]
Yong et al.		48		47	11.34%	-1.86 [-1.53, -3.10]
Bin et al.		33		33	21.39%	-4.76 [-5.09, -4.01]
Total (95% CI)		446		444	100.00%	-2.06 [-3.91, -1.62]

Heterogeneity: ; , (); . Test for overall effect: ().