Table 1.

Patients’ demographics and baseline characteristics.

Variables	Group G (n = 34)	Group Y (n = 42)	P
Age	67.3 ± 4.9	51.4 ± 4.1	0.000†
Gender (F/M)	6/28	12/30	0.265
BMI	26.0 ± 2.7	27.0 ± 3.4	0.159
Disease duration (year)	5.1 ± 3.9	4.6 ± 4.1	0.625
Surgical side (left/right/bilateral)	17/14/3	11/19/12	0.036†
Comorbidities (hypertension/CHD/diabetes mellitus)
0	10	23	0.041†
1	18	17
≥ 2	6	2

BMI body mass index, CHD coronary heart disease.

^†P < 0.05, significant variables.