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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: Alcohol Clin Exp Res. 2008 Jul 24;32(10):1799–1806. doi: 10.1111/j.1530-0277.2008.00751.x

Table 4.

Self-reported behavioral changes with and without coffee consumption *

Behavioral Changes with Consumption (N=244) % Behavioral Changes without Consumption (N=244) %
Are more alert 87.3 Feel half awake 67.8
You “perk up” 87.2 Become sleepy 60.3
Are more active 75.7 Become irritable 55.0
Work more efficiently 71.6 Get a headache 50.4
Are less irritable 42.0 Become lethargic 46.7
Are more relaxed 32.1 Unable to work effectively 41.7
Become nervous 23.5 Become restless 26.9
Work less efficiently 7.0 Become nervous 23.6
You get drowsy 4.1 Be more alert 10.7
You become sluggish 2.1 Be more energetic 9.5
Other 7.4 Be more active 7.8
Other 3.3
*

More than one choice may have been selected. Therefore the percentages do not sum to 100.