Table 2.

Subgroup analysis of operation-related measurements according to the comparison with other operative types.

Subgroups	Positive Lymph Node Number (SMD [95% CIs]; I2)	Incidence of Skin Flap Perforation (OR [95% CIs]; I2)	Incidental Parathyroidectomy (OR [95% CIs]; I2)
Overall	−0.0858 [−0.3441; 0.1725]; 66.7%	6.0165 [0.9318; 38.8464]; 0.0%	1.3392 [0.3981; 4.5049]; 0.0%
Robotic bilateral axillo-breast approach	N = 2 0.3221 [−0.6146; −0.0296]; 0.0%	N = 2 5.8977 [0.5962; 58.3455]; 0.0%	N = 2 1.3392 [0.3981; 4.5049]; 0.0%
Robotic postauricular approach
Conventional open thyroidectomy	N = 2 0.0629 [−0.2508; 0.3766]; 75.0%	N = 1 6.2563 [0.2526; 154.9504]; NA
Transoral endoscopic approach
p value	0.0785	0.9766

SMD: Standardized mean difference, CI: Confidence interval, OR: Odds ratio, NA: Not available.