Table 4:

Results of multilevel negative binomial analyses examining associations between early age of first intoxication and number of problems related to drinking in different contexts among underage drinkers (N=405 nested within 24 cities), IRR (95% CI)

	Number of problems Restaurants	Number of problems Outdoor Places	Number of problems Home
Later age of first intoxication (≥ 16 years)1	2.10 (0.56, 7.52)	1.48 (0.84, 2.62)	1.79 (1.13, 2.84)
Early age of first intoxication (≤ 15 years)1	5.72 (2.46, 13.30)***	3.40 (1.98, 5.82)***	2.84 (1.80, 4.49)***
Place frequency2	1.90 (1.24, 2.91)*	1.43 (1.24, 1.66)***	0.79 (0.44, 1.42)
Drinking in the place3	3.86 (1.47, 10.14)*	1.01 (0.99, 1.02)	1.01 (1.00, 1.02)
Drinking frequency	0.87 (0.78, 0.97)*	1.01 (0.99, 1.01)	1.00 (0.99, 1.01)
Heavier drinking	1.01 (1.00, 1.02)	1.00 (0.99, 1.00)	1.00 (0.99, 1.00)
Age	0.85 (0.46, 1.57)	0.82 (0.59, 1.12)	0.90 (0.73, 1.12)
Female	2.14 (0.79, 5.75)	0.69 (0.45, 1.10)	0.74 (0.57, 0.98)
Non-Hispanic White	0.85 (0.26, 2.76)	1.10 (0.67, 1.63)	0.82 (0.53, 1.29)
Parent education	1.38 (0.96, 1.99)	1.02 (0.94, 1.11)	0.97 (0.90, 1.05)
Disposable income	1.00 (0.99, 1.01)	1.00 (0.99, 1.01)	1.00 (0.99, 1.00)

¹Compared with never intoxicated

²Log transformed

³Number of days drinking in the place in the past year

Holm-Bonferroni sequentially corrected probabilities:

^*p_c < .05

^**p_c < .01

^***p_c < .001