Table 3.

Hierarchical regressions for linear (age¹), quadratic (age²) and cubic (age³) regressors of age for average amount of glasses consumed per night, total last month alcohol use and total lifetime alcohol use, see also Fig. 3.

	df	R2Δ	FΔ	pFΔ	B	SE	β	t	p
Average amount of glasses
Step 1	1166	.31	75.79	<.001
Constant					−5.66	0.99		−5.71	<.001
Age1					0.49	0.06	0.56	8.71	<.001
Step 2	2165	.07	17.44	<.001
Constant					−8.26	1.13		−7.30	<.001
Age1					0.68	0.07	0.77	9.70	<.001
Age2					0.06	0.01	0.33	4.18	<.001
Step 3	3164	.00	.28	.60
Constant					−0.48	14.89		−0.03	0.98
Age1					0.28	0.76	0.32	0.37	0.72
Age2					0.02	0.07	0.12	0.31	0.76
Age3					<.001	<.001	0.36	0.52	0.60
Last month
Step 1	1167	0.39	107.58	<.001
Constant					−39.34	4.98		−7.90	<.001
Age1					2.94	0.28	0.63	10.37	<.001
Step 2	2166	0.01	2.04	.16
Constant					−44.05	5.96		−7.39	<.001
Age1					3.27	0.37	0.70	8.92	<.001
Age2					0.10	0.07	0.11	1.43	0.16
Step 3	1165	0.01	2.05	.15
Constant					−154.62	77.52		−2.00	0.05
Age1					8.92	3.97	1.90	2.25	0.03
Age2					0.59	0.35	0.66	1.69	0.09
Age3					−0.03	0.02	−0.96	−1.43	0.15
Lifetime
Step 1	1167	0.57	219.95	<.001
Constant					−113.98	10.79		−10.57	<.001
Age1					9.09	0.61	0.75	14.83	<.001
Step 2	2166	0.06	27.58	<.001
Constant					−148.84	12.02		−12.38	<.001
Age1					11.57	0.74	0.96	15.64	<.001
Age2					0.74	0.14	0.32	5.25	<.001
Step 3	1165	0.01	4.31	.04
Constant					−470.21	155.32		−3.03	<.001
Age1					27.99	7.95	2.32	3.52	<.001
Age2					2.16	0.70	0.95	3.09	<.001
Age3					−0.08	0.04	−1.08	−2.08	0.04