Table 2. Frequency and Adjusted Risk of 30-Day Postoperative Outcomes in Patients With ASB or Without ASB, Stratified by Surgical Typea.
| Cohort | No./Total No. (%) | aOR (95% CI) | P Value | |
|---|---|---|---|---|
| Preoperative ASB Not Identified (n = 16 994) | Preoperative ASB Identified (n = 617) | |||
| Whole cohort | ||||
| SSI | 268/16 994 (1.6) | 15/617 (2.4) | 1.58 (0.93-2.70) | .08 |
| UTI | 196/12 913 (1.5) | 14/423 (3.3) | 1.42 (0.80-2.49) | .22 |
| Positive wound culture resultb | 497/16 994 (2.9) | 23/617 (3.7) | 1.20 (0.78-1.85) | .39 |
| Positive urine culture result | 616/16 994 (3.6) | 83/617 (13.5) | 2.87 (2.28-3.70) | <.001 |
| Cardiac procedure | ||||
| SSI | 41/4081 (1.0) | 6/194 (3.1) | 3.06 (1.27-7.30) | .01 |
| UTI | NA | NA | NA | NA |
| Positive wound culture resultb | 149/4081 (3.7) | 9/194 (4.6) | 1.22 (0.61-2.45) | .57 |
| Positive urine culture result | 195/4081 (4.8) | 31/194 (16) | 3.11 (2.04-4.74) | <.001 |
| Orthopedic procedure | ||||
| SSI | 154/11949 (1.3) | 5/376 (1.3) | 1.19 (0.48-2.96) | .69 |
| UTI | 164/11949 (1.4) | 14/376 (3.7) | 1.71 (0.97-3.04) | .06 |
| Positive wound culture resultb | 226/11949 (1.9) | 6/376 (1.6) | 0.86 (0.37-1.96) | .72 |
| Positive urine culture result | 364/11949 (3.0) | 46/376 (12.2) | 2.79 (1.98-3.93) | <.001 |
| Vascular procedure | ||||
| SSI | 73/964 (7.6) | 4/47 (8.5) | 1.10 (0.37-3.23) | .85 |
| UTI | 32/964 (3.3) | 0/47 (0) | NA | .98 |
| Positive wound culture resultb | 122/964 (12.7) | 8/47 (17.0) | 1.36 (0.61-3.04) | .44 |
| Positive urine culture result | 57/964 (5.9) | 6/47 (12.8) | 2.10 (0.84-5.25) | .11 |
Abbreviations: aOR, adjusted odds ratio; ASB, asymptomatic bacteriuria; NA, not applicable; SSI, surgical-site infection; UTI, urinary tract infection.
a
Covariates included diabetes status, smoking status, American Society of Anesthesiologists score higher than 2, sex, and age.
b
Wound cultures were abstracted up to 90 days after surgical procedure.