Name
qrs
Label
QRS Axis
Description
Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.
Units
millimeters
Type
numeric
Tags
Sleep Heart Health Study (SHHS) Visit Number vs QRS Axis
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Visit 1 | 2,180 | 19.5 | ± 36.3 | 20.0 | -162.0 | 170.0 | 3,624 | 5,804 |
| Interim Follow-up Visit | - | - | - | - | - | - | - | - |
| Visit 2 | 3,449 | 26.1 | ± 64.8 | 20.0 | -145.0 | 358.0 | 631 | 4,080 |
| CVD Outcomes | - | - | - | - | - | - | - | - |
Age at Sleep Heart Health Study Visit One (SHHS1) vs QRS Axis
Visit 1
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 2,180 | 19.5 | ± 36.3 | 20.0 | -162.0 | 170.0 | 3,624 | 5,804 |
| 35-44 years | 97 | 35.9 | ± 29.5 | 38.0 | -62.0 | 96.0 | 245 | 342 |
| 45-54 years | 321 | 30.8 | ± 27.6 | 30.0 | -40.0 | 90.0 | 696 | 1,017 |
| 55-64 years | 304 | 24.1 | ± 30.4 | 30.0 | -67.0 | 95.0 | 1,465 | 1,769 |
| 65-74 years | 534 | 16.3 | ± 34.7 | 15.0 | -149.0 | 120.0 | 1,083 | 1,617 |
| 75-84 years | 832 | 15.3 | ± 40.2 | 15.0 | -162.0 | 170.0 | 123 | 955 |
| 85 years or older | 92 | 4.6 | ± 41.2 | 0.0 | -110.0 | 87.0 | 12 | 104 |
Gender of the participant vs QRS Axis
Visit 1
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 2,180 | 19.5 | ± 36.3 | 20.0 | -162.0 | 170.0 | 3,624 | 5,804 |
| Male | 978 | 16.7 | ± 39.1 | 17.0 | -162.0 | 148.0 | 1,787 | 2,765 |
| Female | 1,202 | 21.8 | ± 33.6 | 23.0 | -117.0 | 170.0 | 1,837 | 3,039 |
Gender of the participant vs QRS Axis
Visit 2
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 3,449 | 26.1 | ± 64.8 | 20.0 | -145.0 | 358.0 | 631 | 4,080 |
| Male | 1,583 | 25.2 | ± 72.7 | 15.0 | -105.0 | 358.0 | 278 | 1,861 |
| Female | 1,866 | 27.0 | ± 57.3 | 23.0 | -145.0 | 358.0 | 353 | 2,219 |
Race of the participant vs QRS Axis
Visit 1
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 2,180 | 19.5 | ± 36.3 | 20.0 | -162.0 | 170.0 | 3,624 | 5,804 |
| White | 1,656 | 20.0 | ± 36.8 | 21.0 | -162.0 | 148.0 | 3,251 | 4,907 |
| Black | 308 | 13.0 | ± 36.3 | 14.5 | -120.0 | 170.0 | 207 | 515 |
| Other | 216 | 25.2 | ± 30.5 | 25.0 | -62.0 | 96.0 | 166 | 382 |
Race of the participant vs QRS Axis
Visit 2
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 3,449 | 26.1 | ± 64.8 | 20.0 | -145.0 | 358.0 | 631 | 4,080 |
| White | 3,013 | 27.2 | ± 65.9 | 20.0 | -145.0 | 358.0 | 574 | 3,587 |
| Black | 228 | 6.2 | ± 54.9 | 4.5 | -88.0 | 350.0 | 28 | 256 |
| Other | 208 | 33.0 | ± 54.9 | 28.0 | -73.0 | 358.0 | 29 | 237 |