Table 1. Number of suicides and suicide rates from a difference-in-difference study by Page et al.

	Intervention		Control
	Pre-implementation	Post-implementation	Pre-implementation	Post-implementation
Number	$A_{10}=3363$	${\displaystyle A_{11}=1727}$	$A_{00}=7141$	$A_{01}=3821$
Rate	$R_{10}=12.1$	$R_{11}=11.9$	$R_{00}=10.8$	$R_{01}=10.9$