Table 2.
Risk Factors for Organ-Space SSI after Hysterectomy
| Risk Factor | SSI Case Patients n= 32 (%) | Control Uninfected Patients n = 722 (%) | p |
|---|---|---|---|
| Insurance status | |||
| Private or Medicare | 22 (68.8) | 641 (88.8) | |
| None | 4 (12.5) | 24 (3.3) | .007 |
| Medicaid | 6 (18.8) | 57 (7.9) | .020 |
| Current smoking | 14 (43.8) | 106 (14.7) | <.001 |
| Congestive heart failure | 2 (6.3) | 11 (15) | .102 |
| Diabetes | 2 (6.3) | 82 (11.4) | .566 |
| Cancer | 6 (18.8) | 258 (35.7) | .049 |
| Perioperative blood transfusion | 7 (21.9) | 25 (78.1) | .301 |
| Vaginal hysterectomy | 14 (43.8) | 261 (36.1) | .382 |
| Continuous Risk Factors | SSI Case Patients Median (Range) | Control Uninfected Patients Median (Range) | p |
| Age (years) | 45 (33-72) | 52 (20-92) | .001 |
| Body Mass Indexa | 26.5 (20.5-54.5) | 27.5 (15.8-67.3) | .228 |
| Duration of operation (minutes)b | 147 (44-369) | 146 (33-476) | .769 |
| Creatinine, mg/dL (highest during operative admission)c | 0.7 (0.3-6.7) | 0.7 (0.3-5.1) | .598 |
| Glucose, mg/dL (highest from 24 hours before to 5 days after operation)d | 129 (80-315) | 140 (81-500) | .690 |
a
Weight in kg/(height in m2). 56 control patients missing values for weight and/or height
b
1 control patient had missing values for operation start and stop times.
c
9 case patients and 281 control patients were missing data for creatinine in the operative admission.
d
23 case patients and 435 control patients were missing data for serum glucose in the operative admission.