Table 2. Summary Statistics for Energy-adjusted intake by smoking status.

Variable	Statistics	Smoking Status			p* trend
		Never	Former	Current
Total Calories	Mean	2031.5	2166.4	2337.4	<0.0001
(kcal/day)	Median	1856.4	2013.9	2168.4
	SD	818.9	869.2	961.2
Choline	Mean	298.3	305.7	305.7	0.038
(mg/day)	Median	290.5	295	298.2
	SD	72.4	87.4	91.6
Betaine	Mean	55.7	49.8	42.7	<0.0001
(mg/day)	Median	45.3	39.6	35.8
	SD	35.4	36.4	30.8

^*p-value, test for linear trend.