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Table 3 Multiple linear regression analyses on SDNN and SDANN

From: Early changes in ambulatory electrocardiography after transcatheter closure in patients with atrial septal defect and factors affecting heart rate variability

Dependent variable Variable Unstandardized coefficient Standardized β p Value R2
β Std. Error
SDNN Age −0.487 0.107 − 0.316 < 0.001 0.415
Sex −11.416 3.451 −0.213 0.001
Defect diameter −1.091 0.245 − 0.287 < 0.001
Heart rate −1.316 0.181 −0.498 < 0.001
Diabetes −18.990 8.059 −0.153 0.02
SDANN Age −0.403 0.105 −0.285 < 0.001 0.296
Sex −11.732 3.449 −0.240 0.001
Defect diameter −0.969 0.242 −0.279 < 0.001
Heart rate −0.840 0.181 −0.347 < 0.001
  1. SDNN the standard deviation of all normal-to-normal (NN) intervals, SDANN the standard deviation of the averages of NN intervals in all 5 min segments of the entire recording