Table 1.

Equations Used in the Current Study

Equation Number	Objective of Equation	Formula	Variable Definitions
1	To compute the relative risk of injury when alcohol-positive versus negative (RR)	$\mathrm{RR}=[\mathrm{I}∕\mathrm{H}]∕\left[\right(1-\mathrm{I})∕(1-\mathrm{H}\left)\right]$	I = fraction of hospitalized injury victims who are alcohol-positive H = fraction of hours alcohol-positive
2	To compute the upper bound of the fraction of injuries attributable to alcohol (AF)	$\mathrm{AF}={\mathrm{I}}^{\ast }(\mathrm{RR}-1)∕\mathrm{RR}$	RR = Relative risk of injury when alcohol- positive versus negative (see Equation 1)
3	To compute the fraction of annual hours that a group of adults is alcohol positive (H)	$\mathrm{H}=(\mathrm{C}∕\mathrm{M})∕8,766\text{hrs}$	C = per capita alcohol consumption in ounces M = the average rate alcohol is metabolized = 0.45 oz/ hour across all drinkers and 0.675 oz/hour for heavy drinkers 8,766 hours = the number of hours in a year