From: Acute effects of coffee on QT interval in healthy subjects
Coffee | P-value2 | |||
---|---|---|---|---|
Caffeinated | Decaffeinated | Time | Time × Treatment | |
N = 40 | N = 40 | |||
Systolic blood pressure (mmHg) | ||||
basal | 107 ± 2 | 107 ± 2 | ||
30 min | 112 ± 2a | 106 ± 2 | <0.05 | <0.001 |
60 min | 111 ± 2a | 107 ± 2 | ||
P-value3 | <0.001 | 0.50 | ||
Diastolic blood pressure (mmHg) | ||||
basal | 68 ± 1 | 67 ± 1 | ||
30 min | 72 ± 1a | 66 ± 1 | <0.001 | <0.005 |
60 min | 71 ± 1b | 68 ± 1 | ||
P-value3 | <0.001 | 0.16 | ||
Heart rate (beats/min) | ||||
basal | 67 ± 1 | 66 ± 1 | ||
30 min | 69 ± 1c | 67 ± 1 | <0.001 | 0.16 |
60 min | 64 ± 1d | 65 ± 1e | ||
P-value3 | <0.001 | 0.09 |