Figure 2

Causes of elevated osmolal gaps. For the 341 patients who presented with elevated osmolal gap (OG) > 14 on initial laboratory studies on presentation to the medical center, the suspected primary cause was determined from analysis of toxic alcohols by gas chromatography and by chart review. The black bars indicate number of patients where toxic alcohol ingestion was the likely primary cause of the elevated OG. The red bars are suspected primary causes of elevated OG in the absence of toxic alcohol ingestions.