|
Coefficients and statistical significance of the quadratic term in equations regressing heart rate variability indices on lag. |
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| HRV index |
CHF patients |
Normal subjects |
||
|
|
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| Coefficient |
P |
Coefficient |
P |
|
|
|
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| Beat sequence length = 50 |
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|
|
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| SDLD |
0.00002 |
0.769 |
-0.00033 |
3.5 × 10-5 |
| SD1 |
0.00002 |
0.741 |
-0.00020 |
3 × 10-5 |
| SD2 |
-0.00004 |
0.417 |
0.00010 |
0.002 |
| SD1/SD2 |
0.00062 |
0.553 |
-0.00510 |
0.0003 |
|
|
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| Beat sequence length = 50000 |
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|
|
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| SDLD |
1.5 × 10-6 |
0.968 |
-0.00028 |
1 × 10-7 |
| SD1 |
2.27 × 10-6 |
0.932 |
-0.00020 |
1.4 × 10-7 |
| SD2 |
-0.00001 |
0.502 |
0.00003 |
0.078 |
| SD1/SD2 |
0.00028 |
0.531 |
-0.00158 |
4 × 10-8 |
Thakre and Smith BMC Cardiovascular Disorders 2006 6:27 doi:10.1186/1471-2261-6-27 |
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