Table 2.

Encounter characteristics for alcohol-related frequent users vs. non-frequent users.

Encounter variable	Frequent user encounter (n=11,370)	Non-frequent user encounter (n=20,751)	Difference (95% CI)
Initial BAC (mean mg/dl)*	256	221	35 (95% CI 33–37)
Admitted to hospital	340 (3%)	627 (3%)	0% (95% CI 0–1)
ICU admissions	109 (1%)	189 (1%)	0% (95% CI 0–1)
Laboratory testing	725 (6%)	1523 (7%)	−1% (95% CI −1 to 0)
CT performed	434 (4%)	1309 (6%)	−2% (95% CI −3 to −2)
Chemical sedation	3957 (35%)	8987 (43%)	−8% (95% CI −10 to −7)
Length of stay (mean minutes)	470	482	−12 (95% CI −17 to −7)

BAC, blood alcohol concentration; CI, confidence interval; ICU, intensive care unit; CT, computed tomography.

Encounter characteristic calculated using all encounters, including multiple encounters per patient.

^*BAC was performed on 100% of patients.