TABLE 2.
Multivariable Logistic Regression of Patient and Procedure-related Determinants of Any Bowel Preparation Among Patients in the NSQIP Database Who Underwent Elective Colectomy Between 2012 and 2018 (N = 87,481)*
| Any Bowel Preparation † | |||
|---|---|---|---|
| Characteristic | aOR | 95% CI | P |
| Operative year (2012) | Reference | – | – |
| 2013 | 1.05 | 0.97, 1.14 | 0.23 |
| 2014 | 0.92 | 0.85, 0.99 | 0.04 |
| 2015 | 1.04 | 0.97, 1.12 | 0.31 |
| 2016 | 1.28 | 1.19, 1.37 | <0.01 |
| 2017 | 1.84 | 1.71, 1.99 | <0.01 |
| 2018 | 1.04 | 1.10, 1.97 | <0.01 |
| Age (60–69 years old) | Reference | – | – |
| <30 years old | 0.86 | 0.77, 0.96 | <0.01 |
| 30–39 years old | 0.94 | 0.87, 1.03 | 0.17 |
| 40–49 years old | 0.97 | 0.91, 1.04 | 0.42 |
| 50–59 years old | 1.01 | 0.96, 1.06 | 0.66 |
| 70–79 years old | 0.90 | 0.86, 0.95 | <0.01 |
| 80–89 years old | 0.83 | 0.78, 0.88 | <0.01 |
| Sex (female) | Reference | – | – |
| Male | 1.05 | 1.01, 1.08 | <0.01 |
| Race (White) | Reference | – | – |
| Black or African American | 0.91 | 0.85, 0.97 | <0.01 |
| Other | 0.95 | 0.87, 1.04 | 0.26 |
| Unknown/not reported | 0.69 | 0.64, 0.73 | <0.01 |
| Ethnicity (Non-Hispanic) | Reference | – | – |
| Hispanic | 0.86 | 0.79, 0.93 | <0.01 |
| Unknown/not reported | 0.51 | 0.47, 0.55 | <0.01 |
| BMI [normal weight (BMI = 18.5–24.9)] | Reference | – | – |
| Overweight (BMI = 25.0–29.9) | 1.00 | 0.96, 1.05 | 0.96 |
| Obese (BMI ≥ 30) | 1.02 | 0.98, 1.07 | 0.37 |
| Underweight (BMI < 18.5) | 0.80 | 0.73, 0.89 | <0.01 |
| History of congestive heart failure | 0.78 | 0.64, 0.96 | 0.02 |
| High BUN > 25 | 0.86 | 0.80, 0.92 | <0.01 |
| Indication for surgery (colon cancer) | Reference | – | – |
| Colon cancer with obstruction | 0.64 | 0.58, 0.71 | <0.01 |
| Acute diverticulitis | 1.00 | 0.93, 1.09 | 0.84 |
| Bleeding | 0.62 | 0.46, 0.84 | <0.01 |
| Chronic diverticular disease | 1.27 | 1.21, 1.34 | <0.01 |
| Crohn’s disease | 0.71 | 0.66, 0.77 | <0.01 |
| Entercolitis (ie, C. difficile) | 0.67 | 0.31, 1.49 | 0.33 |
| Non-malignant polyp | 0.93 | 0.89, 0.99 | 0.01 |
| Ulcerative colitis | 0.60 | 0.54, 0.68 | <0.01 |
| Volvulus | 0.52 | 0.43, 0.64 | <0.01 |
| Surgical approach (open) | Reference | – | – |
| Minimally invasive | 1.31 | 1.26, 1.36 | <0.01 |
| Colectomy laterality (left) | Reference | – | – |
| Right | 0.74 | 0.71, 0.77 | <0.01 |
*Listwise deletion of variables with missing data reduced the total sample size, although not enough to decrement the power of the study.
†Any bowel prep = antibiotic only, mechanical only, and both.
aOR indicates adjusted odds ratio; BMI, body mass index; BUN, blood urea nitrogen; CI, confidence interval; NSQIP, National Surgical Quality Improvement Program.