Gerhardt plots for osmolal gaps for diagnosis of toxic alcohol ingestions. The bars above the horizontal line at 0 indicate number of patients identified as having ingested toxic alcohols at a particular OG. The bars below the horizontal line indicate number of patients with a cause other than toxic alcohol ingestion at that particular OG. The plot in (A) shows all data for OG of 9 and above. The plot in (B) focuses on data for OG 15 and above only.
Krasowski et al. BMC Clinical Pathology 2012 12:1 doi:10.1186/1472-6890-12-1