Comparison of robot-assisted retroperitoneal laparoscopic adrenalectomy versus retroperitoneal laparoscopic adrenalectomy for large pheochromocytoma: a single-centre retrospective study

Table 1 Preoperative profiles of patients in this study

Variable	RLA (n = 32)	RARLA (n = 19)	p value
Demographic characteristics
Age(years)	47.53 ± 14.048	44 ± 9.062	0.332&
Gender
Female	17(53.1)	8(42.1)	0.447
Male	15(46.9)	11(57.9)
BMI (kg/m2)	25.83 ± 4.45	26.64 ± 3.82	0.5116&
Comorbidities
ASA score
I/II	7(21.9)	1(5.3)	0.238
III/IV	25(78.1)	18(94.7)
NNIS
0/1	23(71.9)	12(63.2)	0.517
2/3	9(28.1)	7(36.8)
Coronary heart disease (CHD)	8(25.0)	5(26.3)	0.917
Hypertension	30(93.75)	18(94.74)	0.6379
Diabetes	16(50.0)	9(47.4)	0.856
Arrhythmia	10(31.2)	7(36.8)	0.682
Tumor characteristics
Laterality
Left	16(50)	9(47.4)	0.856
Right	16(50)	10(52.6)
Diameter of tumor	7.65(6.625, 9)	8(6, 9)	0.859§

Continuous normally distributed variables were expressed as the mean ± standard deviation (SD); Continuous non-normally distributed variables were expressed as the median (interquartile range); categorical variables are expressed as the number (percentage). Independent sample t-test was used to compare the differences between the means of two continuous normally distributed variables and Mann-Whitney U test was used to compare the differences between the means of two continuous non-normal distribution variables. Chi-square test was used to compare the differences between the categorical variables
& Independent sample t-test, § Mann-Whitney U test, ASA American Society of Anesthesiologists, BMI Body mass index, NNIS National Nosocomial Infections Surveillance RLA Retroperitoneal laparoscopic adrenalectomy, RARLA Robotic assisted retroperitoneal laparoscopic adrenalectomy

ISSN: 1471-2482