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Table 2 Comparison of the two groups for the demographic and operative characteristics

From: Acute kidney injury following supine mini-PNL versus retrograde intrarenal surgery in patients with renal stones < 3 cm: a prospective comparative study

Parameters Mini-PNL group (n = 31) RIRS group (n = 29) p value
Postoperative uNGAL (ng/ml) mean ± SD 45.6 ± 12.4 48.1 ± 13.6 0.47
Stone free rate, n (%) 30 (96.7) 23 (79.3) 0.04
Complication rate, n (%)    0.99
 Grade I 2 (6.4) 3 (10.3)  
 Grade II 1 (3.3)  
Grade III or higher  
Duration of operation (min) mean ± SD 48.2 ± 22.5 62.6 ± 18.1 0.03
Duration of hospitalization (days), median (range) 1 (1–2) 1 (1–3) 0.99