Characteristics of included studies.

Matching factors:1,age; 2,gender; 3,body mass index; 4,American Society of Anesthesiology score; 5,operative side; 6,preoperative dialysis; 7,Indication for surgery; 8, kidney size; 9, previous pelvic/abdominal surgery; Variables:1,operative time; 2,length of hospital stay; 3, specimen weight; 4,overall complications; 5,estimated blood loss; 6, Analgesic requirement; 7, Transfusion. BMI: Body Mass Index, NA: data not available.
*Level of evidence: according to criteria by the Centre for Evidence-Based Medicine[28].
# Quality scores: according to criteria by the Newcastle-Ottawa Scale[29].
Characteristics of included studies.