Table 3.

Multiple regression model of the predictors of P-wave duration

	B	SE (B)	β
Step 1
Constant	90.87	4.7
Age	0.31	0.11	0.31
Step 2
Constant	92.55	4.8
Age	0.2	0.11	0.2*
Female sex	−6.41	2.67	−0.26†
Case status	7.59	2.85	0.29‡

R² = 0.094 for step 1 and 0.2 for step 2 (p = 0.001).

^*p = 0.08

^†p = 0.019

^‡p = 0.01.