Hospital- and patient-related factors associated with differences in hospital antibiotic use: analysis of national surveillance results

Table 1 Measurement units and value ranges for continuous variables entered into 12 linear regression models

Continuous variables	Unit	Data point^arange	Mean
Hospital stay < 2 days	% of discharges	24.5–40.5	32.4
Hospital stay > 10 days	% of discharges	5.2–17.3	9.7
Number of physicians^b	per 100 hospital beds	38.8–128.3	63.9
Number of nurses	per 100 hospital beds	132.5–300.1	197.6
ID^c main ICD-10 diagnosis	% of discharges	1.6–6.0	2.9
Cancer main ICD-10 diagnosis^b	% of discharges	3.6–17.1	8.0
Surgical DRGs	% of discharges	18.0–39.8	27.5
Medical DRGs^b	% of discharges	46.4–79.6	65.9
All ambulatory consultations^b	per 100 hospital beds	89.9–543.3	327.6
ID^c ambulatory consultations^d	per 100 hospital beds	0.5–7.7	2.7
Day-care treatments^d	per 100 hospital beds	10.1–79.5	35.9

^a132 data points: six years of 22 Health Enterprise's annual data.
^bVariable removed from the regression models due to collinearity.
^cID: (any) infectious diseases.
^dVariable included in model, but not significantly associated with antibiotic use.

ISSN: 2047-2994