Table 1.

Characteristics of the practices that responded to the survey, compared to practices that did not respond

	Responders (95% CI)	Non-responders (95% CI)	P-value
Number of doctors working in the practice	6.05 (5.72 to 6.37)	3.71 (3.22 to 4.20)	<0.001
Number of patients registered to the practice	7732 (7265.90 to 8197.58)	6971 (3780.98 to 5322.68)	<0.001
Deprivation associated with the practice: England (n= 186)^a	16.62 (15.01 to 18.23)	19.74 (14.65 to 24.84)	0.20
Deprivation associated with the practice: Scotland (n= 235)^b	7.33 (5.13 to 9.52)	5.76 (3.23 to 8.29)	0.38

↵a Measured by the index of multiple deprivation score.
↵b Measured by the percentage of practices living in data zones defined as the 15% most deprived (population weighted).