Table 4:

Risk of adverse perinatal outcomes comparing women with low fetal fraction to those with normal fetal fraction

	Crude Risk Ratio (95% Confidence Interval)		Adjusted* Risk Ratio (95% Confidence Interval)
	Low Fetal Fraction	Normal Fetal Fraction	Low Fetal Fraction	Normal Fetal Fraction
Placental compromise	1.7 (1.3, 2.4)	Ref	1.6 (1.1, 2.2)	Ref
Hypertensive disease of pregnancy	2.3 (1.6, 3.3)	Ref	1.6 (1.003, 2.6)	Ref
Gestational hypertension	2.0 (0.996, 4.0)	Ref	0.97 (0.44, 2.1)	Ref
Preeclampsia	2.6 (1.2, 5.4)	Ref	2.3 (0.99, 5.5)	Ref
Preeclampsia with severe features	2.7 (1.1, 6.4)	Ref	3.3 (1.2, 8.9)	Ref
Intrauterine growth restriction	1.8 (0.52, 5.9)	Ref	2.9 (0.78, 10.7)	Ref
Abruption	0.51 (0.15, 1.7)	Ref	0.75 (0.22, 2.5)	Ref
Oligohydramnios	2.0 (0.94, 4.5)	Ref	1.9 (0.80, 4.0)	Ref
Small for gestational age	0.75 (0.44, 1.3)	Ref	0.82 (0.44, 1.5)	Ref
Preterm birth	1.02 (0.57, 1.8)	Ref	0.93 (0.52, 1.7)	Ref
Spontaneous	1.06 (0.48, 2.3)	Ref	0.80 (0.38, 1.7)	Ref
Medically indicated	0.97 (0.40, 2.4)	Ref	1.1 (0.43, 3.0)	Ref
Poor Apgar score	2.2 (0.92, 5.4)	Ref	1.6 (0.73, 3.7)	Ref
Neonatal intensive care unit admission	1.3 (0.83, 2.1)	Ref	1.1 (0.65, 1.8)	Ref
Respiratory distress syndrome	1.3 (0.51, 3.4)	Ref	0.997 (0.37, 2.7)	Ref

^*Adjusted for body mass index