Table 3.

Negative Binomial Regression Results—Quantity/Frequency (QF) Categories—Reported as Coefficient Estimates and Incidence Rate Ratios (IRRs)

	Inpatient Days		Outpatient Visits		Emergency Room Visits
	Coefficient	IRR	Coefficient	IRR	Coefficient	IRR
Intercept	−3.756***	—	−0.533***	—	−2.065***	—
	(0.288)		(0.047)		(0.143)
QF-Based Drinking Patterns
Infrequent light drinkers	−0.299***	0.741***	−0.113***	0.893***	−0.332***	0.717***
	(0.113)	(0.084)	(0.018)	(0.016)	(0.051)	(0.036)
Infrequent medium drinkers	−0.488***	0.614***	−0.191***	0.826***	−0.494***	0.610***
	(0.158)	(0.097)	(0.025)	(0.020)	(0.072)	(0.044)
Infrequent heavy drinkers	−0.433**	0.649**	−0.160***	0.852***	−0.354***	0.702***
	(0.217)	(0.141)	(0.033)	(0.028)	(0.091)	(0.064)
Frequent light drinkers	−0.507***	0.602***	−0.229***	0.795***	−0.655***	0.519***
	(0.159)	(0.096)	(0.025)	(0.019)	(0.077)	(0.040)
Frequent medium drinkers	−1.076***	0.341***	−0.343***	0.710***	−0.709***	0.492***
	(0.184)	(0.063)	(0.028)	(0.020)	(0.087)	(0.043)
Frequent heavy drinkers	−1.185***	0.306***	−0.348***	0.706***	−0.589***	0.555***
	(0.207)	(0.063)	(0.031)	(0.022)	(0.092)	(0.051)
Daily light drinkers	−0.781*	0.458*	−0.156**	0.855**	−0.257	0.773
	(0.444)	(0.203)	(0.069)	(0.059)	(0.211)	(0.163)
Daily medium drinkers	−1.130**	0.323**	−0.268***	0.765***	−0.581**	0.560**
	(0.529)	(0.171)	(0.081)	(0.062)	(0.253)	(0.142)
Daily heavy drinkers	−1.063**	0.345**	−0.332***	0.718***	−0.430*	0.651*
	(0.522)	(0.180)	(0.082)	(0.059)	(0.237)	(0.154)

Notes: (1) Standard error in parentheses,

^*(2) Significant at the .10 level,

^**(3) Significant at the .05 level,

^***(4) Significant at the .01 level.

IRR is the incidence rate ratio defined as e^β, where β is the coefficient estimate.