Table 1.

Practice participation in DES18 and DIS from 2006/2007 to 2015/2016

Scheme and years of participation		Practice-years	%
DES18
Years of participation: three		56 200	79.39
	YYY	56 200	79.39
Years of participation: two		11 130	15.72
	YYN	1260	1.78
	YNY	1370	1.94
	NYY	8500	12.01
Years of participation: one		2400	3.39
	YNN	440	0.62
	NYN	680	0.96
	NNY	1280	1.81
No participation		1060	1.50
	NNN	1060	1.50
	Total	70 790	100
DIS
	No	16 970	23.97
	Yes	53 820	76.03
	Total	70 790	100

^aTable shows the size of the DES18 and DIS groups for the balanced panel. In total, 7090 practices contributed data for each year of the 10-year study period. Researchers identified different types of participants for the 3-year DES18, distinguishing practices into categories according to the number and order of participation years. For example, a practice that only participated in the first 2 years of DES18 (but not the third year) was categorised as YYN. DIS was only a 6-month scheme. DES18 =Directed Enhanced Service 18. DIS =Dementia Identification Scheme. N =no. Y =yes.