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Table 2 Risk factors for the intraoperative complication, assigned points and statistical analysis [26]

From: The external validation of a difficulty scoring system for predicting the risk of intraoperative complications during laparoscopic liver resection

Risk factorsOverallPoints assignedIntraoperative complicationP-valuea
YesNo
Number of patients128/23 (17.9%)105 (82.1%)/
Neoadjuvant chemotherapy22 (17.2%)17150.073
Previous open liver resection2 (1.6%)5110.328
Malignant lesion89 (69.5%)222670.003
Lesion size
 Lesion size < 3 cm48 (37.5%)01470.938
 Lesion size 3–5 cm44 (34.4%)29350.596
 Lesion size >5 cm36 (28.1%)313230.001
Classification of laparoscopic liver resection
 Minor93 (72.6%)0984< 0.001
 Technically major18 (14.1%)26120.094
 Anatomically major17 (13.3%)4890.003
  1. aChi-square test