Table 1 Comparisons of patients’ demographics and preoperative clinical characteristics between two groups.

From: Single-access mini-PCNL with flexible cystoscopy vs. multi-access mini-PCNL for complex renal stones in prospective study

Variables, mean ± SD or n (%)

Single-access MPCNL group (n = 98)

Multi-access MPCNL group (n = 97)

P value

Age (years)

43.7 ± 6.3

44.8 ± 5.2

0.185

BMI (kg/m2)

24.3 ± 3.3

23.7 ± 2.8

0.173

Gender

 Male

57 (58.2)

52 (53.6)

–

 Female

41 (41.8)

45 (46.4)

0.522

Hypertension history

42 (42.9)

36 (37.1)

0.413

Diabetes history

31 (31.6)

26 (26.8)

0.459

STONE score

8.9 ± 0.8

8.7 ± 1.1

0.148

Hydronephrosis

 Mild

53 (54.1)

49 (50.5)

0.618

 Moderate

34 (34.7)

35 (36.1)

0.839

 Severe

11 (11.2)

13 (13.4)

0.644

Urine culture

 Negative

59 (60.2)

63 (64.9)

–

 Positive

39 (39.8)

34 (35.1)

0.494

The distribution of stones

 Multiple stones

37 (37.7)

42 (43.3)

–

 Staghorn stones

61 (62.3)

55 (56.7)

0.430

Previous surgerya

 No

81 (82.6)

84 (86.6)

–

 Yes

17 (17.4)

13 (13.4)

0.445

  1. BMI body mass index, SD standard deviation;
  2. aPrevious surgery include flexible ureteroscope lithotripsy, percutaneous nephrolithotomy or open surgery for stone.
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