Table 2.

Response rates

	Lottery			Control			Total
Practice	Number Responded	Total mailed	%	Number Responded	Total mailed	%	%
1	365	558	65.4	359	557	64.5	64.9
4	394	555	71.0	390	547	71.3	71.1
5	333	522	63.8	335	519	64.6	64.2
8	423	553	76.5	426	556	76.6	76.6
3	329	538	61.2	318	547	58.1	59.6
2	371	558	66.5	355	553	64.2	65.4
6	137	367	37.3	132	353	37.4	37.4
7	259	553	46.8	283	549	51.5	49.2