Table 1.

General demographic data

	ZT	MT	P value
Gender (n)
Male	45	44	0.374
Female	46	35
Age (years)	55.10 ± 10.89	51.52 ± 11.93	0.042
BMI (Kg/m2)	27.68 ± 2.94	27.45 ± 1.89	0.548
Tumour location (n)
Left	54	44	0.683
Right	37	35
Tumour size (cm)	4.21 ± 1.29	4.27 ± 1.35	0.733
Tumour type (n)
Incidental tumour	52	42
Pheochromocytoma	2	5	1.000
Others	37	32

ZT, Zhang's technique; MT, modified technique.