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Table 1 Patient characteristics for patients undergoing ureteroscopy for urinary stones in MUSIC ROCKS stratified by post-operative course

From: Infection-related hospitalization following ureteroscopic stone treatment: results from a surgical collaborative

Risk factor Infection-related hospitalization (n = 43) Non-hospitalized (n = 1737) P value
Pre-operative characteristics
Public insurance 25 (58.1%) 669 (39.7%) 0.01
Mean age (SD) 60.1 (15.8) 54.4 (15.5) 0.02
Male gender 19 (44.2%) 867 (50.1%) 0.44
BMI > 30 24 (58.5%) 788 (46.8%) 0.13
CCI ≥ 1 26 (60.5%) 495 (28.5%) < 0.01
CCI ≥ 2 14 (32.6%) 241 (13.9%) < 0.01
Presence of hydronephrosis on pre-operative imaging 27 (67.5%) 1048 (66.7%) 0.92
Largest stone size (mm), mean (SD) 10.1 (6.5) 7.8 (5.4) < 0.01
Solitary kidney 2 (4.7%) 25 (1.5%) 0.13
Horseshoe kidney 1 (2.3%) 6 (0.4%) 0.16
History of recurrent UTI 9 (20.9%) 88 (5.1%) < 0.01
Urinary diversion 2 (4.7%) 7 (0.4%) 0.02
Spinal cord injury 2 (4.7%) 3 (0.2%) < 0.01
Anti-platelet therapy 13 (30.2%) 345 (20.4%) 0.12
Pre-operative urinalysis/urine culture not performed 9 (20.9%) 355 (20.5%) 0.95
Positive pre-operative urinalysis/urine culture 12 (27.9%) 266 (15.4%) 0.08
Positive pre-operative urinalysis/urine culture treated 0 (0%) 59 (22.2%) 0.07
Urgent/emergent surgery 1 (2.3%) 146 (8.4%) 0.15
Peri-operative antibiotic use 38 (95%) 1513 (96.9%) 0.49
Alpha-blocker therapy prior to URS 11 (26.2%) 755 (45.1%) 0.01
Pre-stenting (ureteral stent in place) 20 (46.5%) 649 (37.5%) 0.23
Stone location
Renal 17 (45.9%) 502 (31.0%) 0.07
Ureter 14 (37.8%) 906 (56.0%)  
Both 6 (16.2%) 211 (13.0%)  
Intra-operative characteristics
Intra-operative complication 3 (7.0%) 33 (1.9%)  < 0.01
 Complication: bleeding 2 (4.7%) 14 (0.8)  
 Complication: perforation 0 (0.0%) 4 (0.2%)  
 Complication: other 1 (2.3%) 15 (0.9%)  
Ureteral dilation 6 (13.9%) 340 (19.7%) 0.44
Ureteral access sheath use 18 (41.9%) 626 (36.6%) 0.49
Lithotripsy with fragments left in-situ 30 (69.8%) 716 (42.3%)  < 0.01
Stenting during URS 31 (72.1%) 1248 (72.1%) 0.99
Post-operative characteristics
Discharged with antibiotics 15 (36.6%) 638 (39.2%) 0.74
Discharged with antibiotics and stent placed 9 (20.9%) 509 (29.3%) 0.23
Discharged with alpha-blocker 27 (65.8%) 911 (55.9%) 0.21
Stone free rate 19 (57.6%) 579 (77.5%) < 0.01