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Table 1 Individual beliefs about the effect of caffeine consumption

From: Caffeine improves work durability and physical performance in anaerobic exercises among active adults in Tripoli Lebanon

  N Mean SE
1. Caffeine picks me up when I am feeling tired 199 3.55 0.252
2. I feel less sleepy after having caffeine 193 3.35 0.241
3. Caffeine improves my attention 195 3.38 0.242
4. Caffeine makes me feel more energetic 198 3.54 0.252
5. Caffeine makes me feel more alert 197 3.53 0.252
6. Caffeine improves my concentration 194 3.45 0.248
7. I can work longer if I have caffeine 194 3.25 0.233
8. Caffeine improves my athletic performance 194 3.23 0.232
9. Workouts are better after having caffeine 194 3.39 0.243
10. I can exercise longer if I have caffeine 197 3.10 0.221
11. Caffeine increases my motivation to work 194 3.36 0.239
12. Caffeine at any time of day throws off my sleep 194 3.06 0.241
13. I am easily stressed after having caffeine 197 2.41 0.172
14. Caffeine makes me feel nervous 195 2.72 0.195
15. I would be unable to function without caffeine 194 2.53 0.182
16. Caffeine improves my mood 194 3.47 0.249