Table 1.

Data for an Illustrative Example of Estimating the Rate of the Outcome Among Treated and Control Groups^a

Treatment Group	Pretreatment		Posttreatment
	Events	Person-Years	Events	Person-Years
	9,642	155,341	8,727	142,110
	4,298	157,783	4,516	148,504

^a Data for this illustration is from Table 4 in Othman et al. (5).