Table 1.

Participant demographics (SD = Standard Deviation).

	Young				Older
	Male		Female		Male		Female
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Age	26.3	4.4	26.2	3.6	67.7	6.3	67.1	3.4
Years in education	18	3	17	3	16	5	14	4
Body Mass Index (BMI)	25.7	3.8	23.8	3.6	25.9	3.4	26.1	3.9
Caffeine consumption (mg/day)	327	88.2	351	110.4	426	74.4	394	87.8
Coffee consumption (cups/day)	2.88	1.54	2.54	1.45	2.64	1.13	3.59	0.93
Fruit and vegetables (portions/day)	4.3	1.5	4.1	1.4	4.4	1.9	5.4	1.8