Table 1 Differences between open and robotic groups in terms of demographic data, tumor characteristics and perioperative outcomes

Mean age (years)

51.5 ± 13.4 (range = 30–76)

58.5 ± 10.25 (range = 31–82)

0.049

Gender (female/male)

9/23

8/15

N.A.

Mean A.S.A. score

1.47 ± 0.51 (range = 1–2)

1.43 ± 0.59 (range = 1–3)

0.819

Mean tumor size (cm)

4.25 ± 3.0 (range = 1.2-15)

4.27 ± 2.27 (range = 0.5-9.5)

0.976

Tumor morphometry (mean values)

R.E.N.A.L.

6.15 ± 2.04 (range = 4–10)

8 ± 1.5 (range = 5–10)

0.0006

P.A.D.U.A.

7.53 ± 1.81 (range = 6–11)

8.56 ± 1.44 (range = 6–11)

0.027

C-index

1.49 ± 0.43 (range = 0.7-2)

1.25 ± 0.5 (range = 0–2)

0.066

Mean operative duration (min)

154.3 ± 55.3 (range = 70–270)

126.09 ± 33.51 (range = 75–220)

0.034

Mean EBL (ml)

189.1 ± 165.4 (range = 100–1000)

239.13 ± 102.2 (range = 100–500)

0.204

Transfusion (n)

5 (15.62%)

1 (4.34%)

0.383

Hilar clamping (n)

8 (25%)

6 (26.08%)

1.0

Mean WIT (min)

20.62 ± 2.19 (range = 16–24)

16.50 ± 5.21 (range = 12–23)

0.064

Mean duration of hospitalization (days)

4.06 ± 1.29 (range = 3–7)

4.6 ± 1.75 (range = 3–10)

0.188

30-day Clavien grade ≥ 2 complications (n)

6 (18.75%)

4 (17.39%)

0.988