Table 3.

Adjusted^a multivariable log binomial and Poisson regression models: single birth preeclampsia relative risk

	All cycles N=12,810		Fresh Autologous N=10,110		Cryopreserved Autologous N=1,502		Fresh Donor N=849		Cryopreserved Donor N=349
	aRR (CI)	p value	aRR (CI)	p value	aRR (CI)	p value	aRR (CI)	p value	aRR (CI)	p value
# embryos transferred (continuous)	1.10 (1.01, 1.19)	0.045	1.14 (1.03, 1.26)	0.018	1.14 (0.90, 1.44)	0.309	0.80 (0.56, 1.15)	0.222	0.90 (0.58, 1.39)	0.628
# prior ART cycles (continuous)	1.01 (0.96, 1.05)	0.724	0.99 (0.92, 1.05)	0.659	0.96 (0.86, 1.08)	0.495	1.07 (1.001, 1.14)	0.038	0.98 (0.87, 1.11)	0.742
Vanishing twin (yes vs. no)	1.18 (0.91, 1.53)	0.268	1.03 (0.72, 1.44)	0.911	1.62 (0.84, 3.14)	0.236	1.35 (0.79, 2.33)	0.277	1.31 (0.40, 4.32)	0.697

^acontrolling for cycle type (all cycles model only), gravida, infant sex, mother's age, non-White race, diabetes and hypertension

Referent values:

Total embryos: Continuous

Prior ART: Continuous

Vanishing twin: No

Cycle type: Fresh non-donor

Gravida: Continuous

Infant sex: Male

Mother's age: Continuous

Non-White race: White

Diabetes: No

Hypertension: No