Age

Visit vs V6: Amplitude of the secondary R-wave
N Mean StdDev Median Min Max Unknown Total
Visit 5 732 2.8 ± 56.5 0.0 0.0 1,513.0 3 735
Participant's age (category) vs V6: Amplitude of the secondary R-wave
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 655 3.1 ± 59.7 0.0 0.0 1,513.0 3 658
5-14 yrs old 63 24.0 ± 190.6 0.0 0.0 1,513.0 1 64
15-24 yrs old 112 0.9 ± 9.2 0.0 0.0 97.0 - 112
25-34 yrs old 62 0.0 ± 0.0 0.0 0.0 0.0 - 62
35-44 years 97 1.7 ± 16.9 0.0 0.0 166.0 1 98
45-54 years 147 1.3 ± 8.3 0.0 0.0 68.0 1 148
55-64 years 84 0.5 ± 4.7 0.0 0.0 43.0 - 84
65-74 years 57 0.8 ± 6.4 0.0 0.0 48.0 - 57
75-84 years 31 0.0 ± 0.0 0.0 0.0 0.0 - 31
85 years or older 2 0.0 ± 0.0 0.0 0.0 0.0 - 2
Participant's sex vs V6: Amplitude of the secondary R-wave
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 732 2.8 ± 56.5 0.0 0.0 1,513.0 3 735
Female 404 0.7 ± 6.0 0.0 0.0 68.0 2 406
Male 328 5.4 ± 84.2 0.0 0.0 1,513.0 1 329
Participant's race vs V6: Amplitude of the secondary R-wave
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 732 2.8 ± 56.5 0.0 0.0 1,513.0 3 735
White 303 0.1 ± 2.2 0.0 0.0 39.0 1 304
Black 407 5.0 ± 75.7 0.0 0.0 1,513.0 2 409
More than one race 22 0.0 ± 0.0 0.0 0.0 0.0 - 22