Table 1 Patients’ preoperative clinical and demographic details

Mean age ± SD (year)

23.21 ± 4.11^abc

28.53 ± 9.14^ab

26.19 ± 8.86^a

25.19 ± 11.81

Female/male

13/12^abc

11/10^ab

16/17^a

17/14

Body mass index (BMI) ± SD

25.53 ± 1.82^abc

23.18 ± 3.61^ab

26.55 ± 3.34 ^a

25.08 ± 3.86

Total stone volume (cm³) ± SD

3.42 ± 0.16^abc

3.96 ± 0.21^ab

4.11 ± 0.51 ^a

3.89 ± 0.41

Stone volume in renal pelvis (cm³) ± SD

1.86 ± 0.13^abc

1.92 ± 0.09^ab

1.83 ± 0.16 ^a

1.92 ± 0.21

Stone volume in upper renal calyx (cm³) ± SD

0.51 ± 0.09^abc

0.63 ± 0.11^ab

0.74 ± 0.06 ^a

0.66 ± 0.08

Stone volume in middle renal calyx (cm³) ± SD

1.11 ± 0.12^abc

1.36 ± 0.11^ab

1.41 ± 0.31 ^a

1.39 ± 0.26

Stone volume in lower renal calyx (cm³) ± SD

1.58 ± 0.21^abc

1.96 ± 0.43^ab

1.81 ± 0.36 ^a

1.69 ± 0.33