Table 1 Characteristics of the study participants (n = 46).

Age

All

46

24.2 (8.2)

Sex

Males

13

28.3

Females

33

71.7

Body mass index (kg/m²)^{^}

All

46

22.5 (3.8)

 < 25 kg/m²

40

87.0

 ≥ 25 kg/m²

6

13.0

Racial Group

Asian

26

56.5

Caucasian

10

21.7

South Asian or Pakistani

4

8.7

Latin, Latino or Latino American

3

6.5

Mixed race

2

4.3

Black

1

2.2

History of cardiovascular problems*

Yes

2

4.3

Regular medication use**

Yes

10

21.7

Past 24-h alcohol consumption (visit 1) ***

Yes

5

11

Past 24-h alcohol consumption (visit 2)^{^^}

Yes

2

5

Past 24-h caffeine consumption (visit 1)

Yes

16

35

Past 24-h caffeine consumption (visit 2)^{^^}

Yes

15

37

Time between visits (days) ^{^^}

All who completed both visits

41

14.7 (6.8)