Table 4.

Side effects by maximum number of energy drinks consumed for any of six situations in an average month for the current semester among college energy drink users

		Maximum energy drink intake
Parameter	n	1	2	≥3	χ2	P (yes versus no)
Weekly jolt and crash episodes	253				19.10	< .01
% of yes responders	74	12	31	57
% of no responders	159	40	25	35
Ever having heart palpitations	215				4.77	.09
% of yes responders	40	20	22	58
% of no responders	175	34	27	39
Ever having headaches	232				1.24	.54
% of yes responders	51	27	24	49
% of no responders	181	33	27	40