Table 3

Demographic characteristics for practices that did and did not participate in the National Diabetes Audit (NDA)

Participated in NDADid not participate in NDAStatistics
Patients in practice aged 65+ years, % (95% CI)16.92 (16.89 to 16.95)17.29 (17.27 to 17.32)P<0.0001
Practice list size, mean (SD)7774.46 (4513.23)6784.73 (4246.99)t(7,653)=−9.93, p=0.001
Diabetes prevalence, % (95% CI)6.31 (6.3 to 6.32)6.45 (6.44 to 6.46)P<0.0001
Deprivation, % (95% CI)χ2(9)=36.17, p<0.0001
Deprivation decile 1 (most deprived)4.91 (4.45 to 5.42)4.96 (4.5 to 5.47)
Deprivation decile 24.94 (4.48 to 5.44)4.99 (4.53 to 5.5)
Deprivation decile 35.42 (4.93 to 5.94)4.54 (4.1 to 5.03)
Deprivation decile 45.56 (5.07 to 6.09)4.44 (4 to 4.92)
Deprivation decile 55.45 (4.97 to 5.98)4.58 (4.13 to 5.07)
Deprivation decile 65.61 (5.12 to 6.14)4.45 (4.01 to 4.93)
Deprivation decile 75.25 (4.77 to 5.77)4.73 (4.28 to 5.23)
Deprivation decile 85.62 (5.13 to 6.16)4.44 (4 to 4.92)
Deprivation decile 95.38 (4.9 to 5.9)4.68 (4.23 to 5.17)
Deprivation decile 10 (least deprived)6.27 (5.75 to 6.83)3.79 (3.39 to 4.24)
Geographic area, % (95% CI)χ2(26)=676.9, p<0.0001
Arden, Herefordshire and Worcestershire1.08 (0.88 to 1.34)1.8 (1.53 to 2.13)
Bath, Gloucestershire, Swindon and Wiltshire1.79 (1.52 to 2.11)0.68 (0.52 to 0.89)
Birmingham and the Black Country2.49 (2.16 to 2.86)3.26 (2.89 to 3.68)
Bristol, North Somerset, Somerset and South Gloucestershire0.7 (0.53 to 0.91)1.61 (1.35 to 1.92)
Cheshire, Warrington and Wirral0.59 (0.44 to 0.79)1.59 (1.33 to 1.89)
Cumbria, Northumberland, and Tyne and Wear2.19 (1.89 to 2.54)1.62 (1.37 to 1.93)
Derbyshire and Nottinghamshire2.26 (1.95 to 2.61)1.17 (0.96 to 1.44)
Devon, Cornwall and Isles of Scilly1.43 (1.19 to 1.72)1.46 (1.21 to 1.75)
Durham, Darlington and Tees0.93 (0.74 to 1.17)1.21 (0.99 to 1.48)
East Anglia2.51 (2.19 to 2.89)1.17 (0.96 to 1.44)
Essex2.35 (2.03 to 2.71)1.08 (0.88 to 1.34)
Greater Manchester2.84 (2.49 to 3.23)3.48 (3.1 to 3.91)
Hertfordshire and The South Midlands2.53 (2.2 to 2.9)1.53 (1.28 to 1.83)
Kent and Medway0.94 (0.75 to 1.18)2.36 (2.04 to 2.72)
Lancashire1.38 (1.14 to 1.66)1.56 (1.31 to 1.86)
Leicestershire and Lincolnshire1.21 (0.99 to 1.48)1.91 (1.63 to 2.24)
London8.99 (8.37 to 9.64)9.05 (8.43 to 9.71)
Merseyside1.43 (1.19 to 1.72)1.44 (1.2 to 1.73)
North Yorkshire and Humber1.84 (1.57 to 2.17)1.1 (0.89 to 1.35)
Shropshire and Staffordshire1.61 (1.35 to 1.92)1.48 (1.24 to 1.78)
South Yorkshire and Bassetlaw1.28 (1.05 to 1.55)1.48 (1.24 to 1.78)
Surrey and Sussex2.94 (2.59 to 3.34)1.34 (1.11 to 1.62)
Thames Valley2.75 (2.4 to 3.13)0.3 (0.2 to 0.44)
Wessex2.93 (2.57 to 3.33)1.12 (0.91 to 1.38)
West Yorkshire3.42 (3.03 to 3.84)0.79 (0.61 to 1.01)