Table 4. Factors associated with LnVLF and LnLF (ms²/Hz) in preeclamptic and controls pregnant women using linear regression analyses.

Variable	LnVLF (ms2/Hz)			LnLF (ms2/Hz)
	Coefficient	SE	P-value	Coefficient	SE	P-value
Age, year	─ 0.018	0.017	0.289	─ 0.041	0.276	0.072
Parity	0.118	0.241	0.625	─ 0.601	3.961	0.071
Gestational age, weeks	─ 0.006	0.027	0.832	0.017	0.041	0.646
Body mass index, (kg)/ (m)2	─ 0.010	0.016	0.555	─ 0.011	0.265	0.612
Hemoglobin, g/dl	0.051	0.071	0.479	0.040	1.169	0.680
Preeclampsia*	0.461	0.199	0.023	─ 0.681	3.269	0.013
Mean heart rate	─ 0.029	0.006	<0.001	─ 0.047	0.008	0.013

SE = standard error

*adjusted for MHR