Table 1 Demographic and result characteristics

Age (year)

80.7 ± 3.7 (range, 75–87)

81.3 ± 4.5 (range, 76–90)

0.6668

Operation time (minute)

84.9 ± 9.2 (range, 63–101)

70.9 ± 10.2 (range, 58–90)

0.0004^a

Blood Loss (ml)

145.9 ± 46.7 (range, 50–210)

125.3 ± 39.4 (range, 80–190)

0.1961

LLD (mm)

2.1 ± 1.9 (rang, 0–6)

8.8 ± 5.1 (range, 3–19)

<0.0001^a