Table 2

Sample characteristics.

Non-patient variables	Description
		n	%
Practice size	Small (501–5000 patients)	43	15
	Medium (5001–10 000 patients)	139	50
	Large (>10 000 patients)	97	34
	Total	279	100

Timepoint	2003	145	52
	2005	134	48
	Total	279	100

Patient variables
		n	%
Patient LSOA deprivation	High (IMD 106-10 972)	92	33
	Medium (IMD 11 165-20 432)	94	34
	Low (IMD 20 642-32 306)	90	32
	Total	276	99

		Median	Range
Patient LSOA deprivation	Rank	18 007	106–32 306

		Median	Range
Age	Years	48	19–95

		n	%
Sex	Male	79	28
	Female	200	72
	Total	279	100

LSOA = Lower Super Output Area. IMD = Indices of Multiple Deprivation 2007 rank.