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. 2022 Jul 21;14(14):2996. doi: 10.3390/nu14142996

Table 3.

Characteristics of the population investigated in different studies [44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69].

Study Sex Habitual Caffeine Intake Age (Years) Experience (Years)
Aedma et al. [44] NR 10 intake < 70 and 4 were intake 80–200 mg/day. 25.3 ± 4.9 ≥4
Arazi et al. [65] F ˂60 mg/day, and 1 cup of coffee 16.8 ± 1.2 ≥3
Astley et al. [45] M NR 16.1 ± 1.4 NR
Athayde et al. [46] M Moderate caffeine consumers 22.5 ± 7.1 12.9 ± 6.4
Athayde et al. [56] M Moderate caffeine consumers 23.1 ± 4.2 12.5 ± 3.9
Carmo et al. [47] M NR 21.6 ± 2.0 ≥7
Cortez et al. [61] NR NR 22.8 ± 4.7 3.7 ± 1.8
Coswig et al. [62] M NR 25.9 ± 5.2 5 ± 1.5
de Azevedo et al. [69] M <250 mg/day 27.6 ± 4.3 NR
Diaz-Lara, Del Coso, García et al. [48] M <60 mg/day 29.2 ± 3.3 ≥5
Diaz-Lara, Del Coso, Portillo et al. [49] M Light caffeine consumers 29.2 ± 3.3 ≥5
Durkalec-Michalski et al. [50] M 10 consumers
12 non-consumers
21.7 ±3.7 11.0 ± 4.5
Felippe et al. [58] M <2 cups of coffee/day 23 ± 5 15 ± 5
Filip-Stachnik et al. [51] M 3.1 ± 1.3 mg/day 23.7 ± 4.4 15.6 ± 4.0
Lopes-Silva et al. [53] NR NR 25.2 ± 5.3 ≥10
Lopes-Silva et al. [52] M NR 25.3 ± 5.7 14.4 ± 8.9
Lopes-Silva et al. [66] M 2 consumed > 6 cups/day
8 consumed < 2 cups/day
21 ± 4 ≥9
Merino Fernández et al. [60] M
F
<0.99 mg/day 21.50 ± 4.75
20.63 ± 3.20
11.88 ± 3.94
15.38 ± 2.92
Merino Fernández et al. [57] M/F NR 22 ± 4 15 ± 7
Krawczyk et al. [59] M/F 2.6 mg/kg/day 24.1 ± 4.7 15.1 ± 5.2
Negaresh et al. [54] M <3 cups of coffee/day 24 ± 3 ≥10
Pereira et al. [55] F NR 17.6 ± 1.6 ≥2
Rezaei et al. [63] NR ≤125 mg/day 20.5 ± 2.4 >5
San Juan et al. [64] M NR 22.0 ± 1.78 NR
Santos et al. [67] M NR 24.9 ± 7.3 ≥7
Ouergui et al. [68] M/F <3 cups of coffee/day 17.5 ± 0.7 ≥6

M: Male; F: Female; NR: Not Reported.