Cleveland Family Study

/datasets/cfs/variables/qrsblok /datasets/cfs/variables/qt

QRS Duration

Units milliseconds
Type numeric

Visit vs QRS Duration

N Mean StdDev Median Min Max Unknown Total
Visit 5 733 92.4 ± 13.6 92.0 64.0 172.0 2 735

Age at time of visit vs QRS Duration

Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 656 92.9 ± 14.0 92.0 64.0 172.0 2 658
5-14 yrs old 63 86.1 ± 8.1 88.0 68.0 104.0 1 64
15-24 yrs old 112 92.7 ± 9.7 92.0 72.0 116.0 - 112
25-34 yrs old 62 91.8 ± 11.2 88.0 68.0 128.0 - 62
35-44 years 98 91.1 ± 10.1 92.0 64.0 120.0 - 98
45-54 years 147 91.2 ± 10.3 88.0 72.0 128.0 1 148
55-64 years 84 94.0 ± 14.9 92.0 72.0 148.0 - 84
65-74 years 57 99.2 ± 21.2 96.0 76.0 172.0 - 57
75-84 years 31 108.1 ± 27.8 100.0 76.0 172.0 - 31
85 years or older 2 88.0 ± 5.7 88.0 84.0 92.0 - 2

Sex vs QRS Duration

Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 733 92.4 ± 13.6 92.0 64.0 172.0 2 735
Female 404 88.9 ± 12.6 88.0 64.0 172.0 2 406
Male 329 96.8 ± 13.6 96.0 72.0 172.0 - 329

Race vs QRS Duration

Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 733 92.4 ± 13.6 92.0 64.0 172.0 2 735
White 304 94.4 ± 13.8 92.0 72.0 172.0 - 304
Black 407 91.0 ± 13.6 88.0 64.0 172.0 2 409
Other 22 91.6 ± 8.3 92.0 72.0 108.0 - 22