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Table 1 Characteristics of patients

From: Breast cancer robotic nipple sparing mastectomy: evaluation of several surgical procedures and learning curve

   Group 1 Group 2 Group 3 Total χ²
  Nb % Nb % Nb % Nb % p
Type reconstruction Implant 1 6.2 2 40.0 1 16.7 4 14.8 0.15
Implant + RLDF 5 31.2 1 20.0 0   6 22.2  
RLDF 10 62.6 2 40.0 5 83.3 17 63.0  
Breast cancer Primitive 10 62.5 3 60.0 4 66.7 17 63.0 0.973
Recurrence 6 37.5 2 40.0 2 33.3 10 37.0  
Cup size A–B 8 50.0 2 18.2 4 66.6 14 51.8 0.466
C 6 37.5 3 60.0 2 33.3 11 40.7  
>C 2 12.5 0   0   2 7.4  
Tobacco No 12 75.0 3 60.0 5 83.3 20 74.1 0.673
Yes 4 25.0 2 40.0 1 16.7 7 25.9  
Diabetes No 15 93.8 5 100 6 100 26 96.3 0.700
Yes 1 6.2 0   0   1 3.7  
ASA 1 8 50.0 2 40.0 2 33.3 12 44.4 0.763
2 8 50.0 3 60.0 4 66.7 15 55.6  
Previous
contralateral BC
No 12 75.0 4 80.0 4 66.7 20 74.1 0.874
Yes 4 25.0 1 20.0 2 33.3 7 25.9  
Previous conservative
breast surgery
No 8 50.0 3 60.0 2 33.3 13 48.1 0.660
Yes 8 50.0 2 40.0 4 66.7 14 51.9  
Previous SLNB No 13 81.2 3 75.0 2 33.3 19 70.4 0.092
Yes 3 18.8 1 25.0 4 66.7 8 29.6  
Previous ALND No 11 68.8 3 60.0 6 100 20 74.1 0.240
Yes 5 31.2 2 40.0 0   7 25.9  
Previous homolateral
Radiotherapy
No 9 56.2 3 60.0 4 66.7 16 59.3 0.906
Yes 7 43.8 2 40.0 2 33.3 11 40.7  
Neo-adjuvant
chemotherapy
No 13 81.2 5 100 6 100 24 88.9 0.3013
Yes 3 18.8 0   0   3 11.1  
Implant volume < = 300 3 50.1 1 33.3 0   4 40.0 0.65
311–330 2 33.4 1 33.3 1 100 4 40.0  
> 400 1 16.7 1 33.3 0   2 20.0  
Axillary surgery No 10   3   4   17 62.9 0.90
SLNB 5   2   2   9 33.3  
ALND 1   0   0   1 3.7  
Trocar number 2 16 100 3 60.0 6 100 25 92.6 0.009
3 0   2 40.0 0   2 7.4  
Da Vinci system SI 11 68.8 2 40.0 1 16.7 14 51.9 0.079
XI 5 31.2 3 60.0 5 83.3 13 48.1  
Procedure surgical
number
1 1 6.2 2 40.0 1 16.7 4 14.8 0.057
2 4 25.0 2 40.0 5 83.3 11 55.6  
3 8 50.0 1 20.0 0   9 33.3  
4 3 18.8 0   0   3 11.1  
Post-operative
hospitalization
< 4 days 7 43.8 3 60.0 4 66.7 14 51.9 0.582
> = 4 days 9 56.2 2 40.0 2 33.3 13 48.1  
BMI < 23.5        22   0.763
> = 23.5        5   
Surgical time < 360 8 50.0 3 60.0 5 83.3 16 59.3 0.366
> = 360 8 50.0 2 40.0 1 16.7 11 40.7  
  1. Abbreviations: RLDF robotic latissimus dorsi flap, SLNB sentinel lymph node dissection, ALND axillary lymph node dissection, BMI body mass index