Retrospective Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Jan 21, 2022; 10(3): 802-810
Published online Jan 21, 2022. doi: 10.12998/wjcc.v10.i3.802
Table 2 Associations between preoperative characteristics and preoperative acute pyelonephritis
Demographic data/clinical parameters
PANP (n = 32)
No-PANP (n = 68 )
P value
Age (yr), mean ± SD29 ± 5.0130 ± 4.040.53
BMI (kg/cm2), mean ± SD21.66 ± 2.4423.30 ± 2.970.007
Gestation (wk), median (Q1, Q3)20 (19, 25)23 (20, 28)0.04
History of stones, n (%)12 (46.2)14 (53.8)0.07
Pain to surgery (h), median (Q1, Q3)114.5 (70, 140)84.5 (61, 120)0.00
< 96 h, n (%)9 (17.6)42 (82.4)0.002
≥ 96 h, n (%)23 (46.9)26 (53.1)
Admission to surgery (h), median (Q1, Q3)53 (24, 160)50 (36, 90)0.81
< 48 h, n (%)15 (35.7)27 (64.3)0.81
≥ 48 h, n (%)17 (29.3)41 (70.7)
Pain to admission (h), median (Q1, Q3)90 (50, 120)24 (12, 48)0.00
< 48 h, n (%)3 (6.1)46 (93.6)0.00
≥ 48 h, n (%)29 (56.9)22 (43.1)
WBC count (× 109/L), mean ± SD14.59 ± 4.4012.96 ± 2.840.06
CRP (mg/dL), median (Q1, Q3)3.20 (1.47, 6.32)2.23 (0.97, 3.86)0.01
Stone location, n (%)0.00
None6 (25)18 (75)
Ureter8 (16.7)40 (83.3)
Kidney18 (64.3)10 (35.7)
Stone size (mm), median (Q1, Q3)8.25 (4.5, 17)8 (0, 12)0.25
< 10 mm, n (%)18 (32.7)37 (67.3)0.86
≥ 10 mm, n (%)14 (31.1)31 (68.9)
Hydronephrosis (mm), median (Q1, Q3)31 (20, 60)19.5 (14, 62)0.05
None/light, n (%)12 (23.1)40 (76.9)0.05
Moderate/severe, n (%)20 (41.7)28 (58.3)
Urology consultation time (h), median (Q1, Q3)23 (13, 68)34 (20, 53)0.23
≤ 24 h, n (%)16 (30.2)37 (69.8)0.68
> 24 h, n (%)16 (34)31 (66)
Total cost (Yuan in RMB), mean ± SD16522.59 ± 8871.6110236.07 ± 3281.160.001
Preoperative fetal complications, n (%)6 (50)6 (50)0.27
UTI after surgery, n (%)12 (54.5)10 (45.5)0.01
LOS (d), mean ± SD11 ± 5.347 ± 2.980.001
Newborn weight (g), mean ± SD2706.56 ± 649.472978.97 ± 460.580.02
Cesarean section rate, n (%)14 (36.8)24 (63.2)0.42
Preterm delivery, n (%)6 (75)2 (25)0.02
PANP: Preoperation acute pyelonephritis, UTI: Urinary tract infection, LOS: Length of stay.