Table 1.

Variable Characteristics of the Study Population (N=395)

Variables	Measure; Mean (SD), Median [Min, Max] or N (%)
Individual-level EHR variables
Age	55.2 (16.4), 56 [19, 96]
Age – 65+ years old	121 (30.6%)
Gender – Female	198 (50.1%)
Race – African American	154 (39.0%)
Charlson’s comorbidity index (CCI)	6.40 (3.92), 6 [0,20]
History of antibiotic usage (Vancomycin)	271 (68.6%)
Prior history of kidney impairment	211 (53.4%)
Types of Infection - Bloodstream	316 (80.0%)
Severity of Infection – ICU stay	206 (52.2%)
Prior Drug Resistance	142 (35.9%)
Nephrotoxicity developed	40 (10.1%)
Vancomycin use at Time1	383 (97.0%)
Vancomycin use at Time2	312 (79.0%)
Vancomycin use at Time3	261 (66.1%)
County-level sociodemographic variables
Number of Healthcare Facilities (number of beds/100,000)	189 (30.3), 192 [107, 367]
Area – Urban	201 (50.9%)
Median household Income	$48,300 (7,900), $44,700 [$39,500, $67,400]
Insurance coverage (% of Uninsured)	21.8 (4.17), 21.9 [13.8, 35.7]