TABLE 2.

Simulated HRs When Gestational Weight Gain Is Measured at Delivery Only

True HR	Model	Estimated HR	Standard Error	95% CI Coverage (%)
1.3	Survivala	1.29	0.02	86
	Binomialb	1.13	0.04	1
1.1	Survival	1.09	0.01	87
	Binomial	0.94	0.03	0
1.0	Survival	0.99	0.01	90
	Binomial	0.88	0.02	0
0.9	Survival	0.89	0.01	91
	Binomial	0.81	0.02	1
0.7	Survival	0.70	0.01	95
	Binomial	0.68	0.02	86

^aWeight gain linearly interpolated from baseline (weight gain = 0) to total weight gain at delivery.

^bTotal gestational weight gain as measured at delivery.

HR indicates hazard ratio; 95% CI, 95% confidence interval.