Figure 2 shows the percentage of the sample that regularly drank de-caffeinated tea
or coffee (by age group). Consumption of de-caffeinated drinks varied by age for both
the regular caffeinated drink consumers (x 2ð6Þ ¼ 17:3, p , 0:01) and non-consumers
of caffeinated drinks (although to a much bigger extent, x 2ð6Þ ¼ 111:3, p , 0:001)
where consumption of de-caffeinated drinks was highest in the 50-59 years age group.
Consumption of de-caffeinated tea/coffee was low in the under 30s age group for the
regular and non-regular caffeine consumers.