bowls_day cans_cola
Name
caffeine
Label
Caffeine intake - beverages per day
Calculation
caffeine = sum(of cups_coffee, cans_cola)
Units
beverages/day
Type
numeric
Tags
sleep_hygiene
Study visit number vs Caffeine intake - beverages per day
N Mean StdDev Median Min Max Unknown Total
Visit 1 1,123 2.7 ± 2.3 2.0 0.0 18.0 - 1,123
Visit 2 758 2.6 ± 2.1 2.0 0.0 15.0 - 758
Visit 3 566 2.6 ± 2.1 3.0 0.0 12.0 - 566
Visit 4 121 2.4 ± 1.8 2.0 0.0 9.0 - 121
Visit 5 2 1.5 ± 0.7 1.5 1.0 2.0 - 2
Incident Outcomes Tracking - - - - - - - -
Sex of the participant vs Caffeine intake - beverages per day
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 1,123 2.7 ± 2.3 2.0 0.0 18.0 - 1,123
Male 608 3.1 ± 2.6 3.0 0.0 18.0 - 608
Female 515 2.4 ± 1.8 2.0 0.0 10.0 - 515
Sex of the participant vs Caffeine intake - beverages per day
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 758 2.6 ± 2.1 2.0 0.0 15.0 - 758
Male 406 2.9 ± 2.3 3.0 0.0 15.0 - 406
Female 352 2.4 ± 1.8 2.0 0.0 12.0 - 352
Sex of the participant vs Caffeine intake - beverages per day
Visit 3
N Mean StdDev Median Min Max Unknown Total
Total 566 2.6 ± 2.1 3.0 0.0 12.0 - 566
Male 304 2.8 ± 2.3 3.0 0.0 12.0 - 304
Female 262 2.4 ± 1.8 2.0 0.0 10.0 - 262
Sex of the participant vs Caffeine intake - beverages per day
Visit 4
N Mean StdDev Median Min Max Unknown Total
Total 121 2.4 ± 1.8 2.0 0.0 9.0 - 121
Male 67 2.6 ± 1.8 3.0 0.0 9.0 - 67
Female 54 2.1 ± 1.8 2.0 0.0 7.0 - 54
Sex of the participant vs Caffeine intake - beverages per day
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 2 1.5 ± 0.7 1.5 1.0 2.0 - 2
Male - - - - - - - -
Female 2 1.5 ± 0.7 1.5 1.0 2.0 - 2
Race of the participant vs Caffeine intake - beverages per day
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 1,123 2.7 ± 2.3 2.0 0.0 18.0 - 1,123
Asian 12 1.6 ± 1.4 1.5 0.0 5.0 - 12
Black 23 1.7 ± 1.4 1.0 0.0 6.0 - 23
Hispanic 13 1.7 ± 1.2 2.0 0.0 4.0 - 13
Native American 10 2.4 ± 1.8 2.5 0.0 6.0 - 10
White 1,065 2.8 ± 2.3 2.0 0.0 18.0 - 1,065
Race of the participant vs Caffeine intake - beverages per day
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 758 2.6 ± 2.1 2.0 0.0 15.0 - 758
Asian 4 1.5 ± 1.3 1.5 0.0 3.0 - 4
Black 8 1.5 ± 1.8 1.0 0.0 5.0 - 8
Hispanic 6 1.8 ± 1.5 1.5 0.0 4.0 - 6
Native American 6 2.8 ± 1.9 2.5 0.0 5.0 - 6
White 734 2.7 ± 2.1 3.0 0.0 15.0 - 734
Race of the participant vs Caffeine intake - beverages per day
Visit 3
N Mean StdDev Median Min Max Unknown Total
Total 566 2.6 ± 2.1 3.0 0.0 12.0 - 566
Asian 4 1.8 ± 1.0 1.5 1.0 3.0 - 4
Black 4 1.5 ± 1.3 1.5 0.0 3.0 - 4
Hispanic 5 2.6 ± 2.7 1.0 0.0 6.0 - 5
Native American 4 1.8 ± 1.3 2.0 0.0 3.0 - 4
White 549 2.6 ± 2.1 3.0 0.0 12.0 - 549
Race of the participant vs Caffeine intake - beverages per day
Visit 4
N Mean StdDev Median Min Max Unknown Total
Total 121 2.4 ± 1.8 2.0 0.0 9.0 - 121
Asian 3 1.3 ± 0.6 1.0 1.0 2.0 - 3
Black 1 2.0 - 2.0 2.0 2.0 - 1
Hispanic 2 1.5 ± 0.7 1.5 1.0 2.0 - 2
Native American 2 2.5 ± 0.7 2.5 2.0 3.0 - 2
White 113 2.4 ± 1.9 2.0 0.0 9.0 - 113
Race of the participant vs Caffeine intake - beverages per day
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 2 1.5 ± 0.7 1.5 1.0 2.0 - 2
Asian - - - - - - - -
Black - - - - - - - -
Hispanic - - - - - - - -
Native American - - - - - - - -
White 2 1.5 ± 0.7 1.5 1.0 2.0 - 2