Table 2.
Multivariable Regression Coefficients for Heart Rate Variability Parameters at Birth and Pregnancy Complications
| Gestational age at birth (weeks) | Maternal Hypertension | Birthweight z-score | |||||||
|---|---|---|---|---|---|---|---|---|---|
| B | 95% CI | p-value | B | 95% CI | p-value | B | 95% CI | p-value | |
| SDNN | 0.76 | -0.13-1.66 | 0.09 | 2.30 | -2.92-7.53 | 0.38 | -1.92 | -4.32-0.47 | 0.11 |
| rMSSD | 0.99 | 0.43-1.54 | 0.001 | 0.24 | -3.17-3.65 | 0.89 | -0.41 | -1.98-1.17 | 0.61 |
| LF | 23.50 | 6.02-40.98 | 0.009 | 61.16 | -42.84-165.16 | 0.25 | -41.59 | -89.25-6.07 | 0.09 |
| HF | 19.25 | 5.51-33.00 | 0.007 | 9.28 | -73.32-91.87 | 0.82 | -10.85 | -48.96-27.27 | 0.57 |
| LF/HF ratio | -0.20 | -0.34- -0.06 | 0.005 | 0.34 | -0.49-1.17 | 0.42 | 0.15 | -0.23-0.53 | 0.44 |
B unstandardized coefficient presented with 95% CI after correcting for postnatal age at assessment and offspring sex SDNN indicates standard deviation of the NN intervals; rMSSD root mean square of the difference between adjacent NN intervals; LF low frequency and HF high frequency