Comparison of Robotic Posterior Retroperitoneal Adrenalectomy over Laparoscopic Posterior Retroperitoneal Adrenalectomy: A Single Tertiary Center Experience

Table 2

Univariate and multivariate analysis of factors related to the operation time.

Variables	Univariate analysis total (n = 230)		Multivariable analysis total (n = 230)		Laparoscopic PRA (n = 169)		Robotic PRA (n = 61)
Related factors	Beta coefficient	value	Beta coefficient	value	Beta coefficient	value	Beta coefficient	value
Gender (male vs. female)	14.7	0.037	14.3	0.028	21.5	0.003	−12.2	0.363
Early period vs. late period (years)	6.3	0.118	8.9	0.010	11.1	0.004	−11.6	0.349
BMI
>27 vs. ≤27	19.0	0.015	26.0	0.001	21.0	0.006	21.5	0.141
Size of adrenal tumor (cm)	12.2	0.001	7.2	0.001	5.6	0.001	9.7	0.001
Pheochromocytoma	29.0	0.001	19.5	0.003	16.8	0.03	31.3	0.019
Site (left vs. right)	3.8	0.580	7.6	0.216	4.6	0.514	−7.6	0.432
Robotic PRA	26.5	0.001	32.4	0.001

PRA: posterior retroperitoneal adrenalectomy; BMI: body mass index.