Table 3.
Multiple regression coefficients for SAECG traits
| Total P-wave duration | Standardized P-wave duration | Integral of P wave | RMS20 | RMS30 | RMS40 | RMS PW | |
|---|---|---|---|---|---|---|---|
| Height (inch) | 0.30 | 0.24 | |||||
| Weight (lb) | 0.09 | 0.10 | –0.72 | –0.01 | –0.01 | –0.01 | –0.01 |
| Current smoking | –1.58 | –1.70 | 36.63 | 0.28 | 0.41 | ||
| Diastolic BP (mm Hg) | 0.92 | ||||||
| Total/HDL cholesterol | –11.68 | –0.10 | |||||
| Waist circumference (inch) | –0.32 | –0.33 | 0.04 | 0.04 | 0.04 | ||
| Heart rate (bpm) | –0.30 | –0.46 | 0.02 | 0.03 | 0.03 | 0.02 | |
| Diabetes | –1.96 | –2.40 | |||||
| Prevalent heart failure | 6.82 | 6.45 | |||||
| Prevalent AF | 4.55 | 5.08 | –0.52 | ||||
| AV node blockers | 2.03 | 1.93 |
Blank cells represent clinical factors that were not significant and thus eliminated into the final backward models. Regression coefficients per unit (continuous variables) or presence of condition (binary variables). Age, sex, and cohort were forced in all the models.
The following factors were not retained in any of the models: Systolic blood pressure, triglycerides, moderate/severe alcohol consumption, hypertension treatment, and prevalence myocardial infarction.
RMS20 = root mean square voltage in terminal 20 ms; RMS30 = root mean square voltage in terminal 30 ms; RMS40 = root mean square voltage in terminal 40 ms; RMS PW = root mean square voltage of the entire P wave; SAECG = signal-averaged electrocardiogram; other abbreviations as in Table 1.