Table 1.

 Characteristics of general practices randomised to receive guidelines on management of angina or asthma. Values are means (standard deviations)

	Randomised to angina guideline	Randomised to asthma guideline	Overall
Whole time equivalent general practitioner	4.5 (1.6)	4.6 (1.8)	4.5 (1.7)
No of patients registered with practice	7837 (3221)	8875 (4460)	8365 (3902)
No of patients per whole time equivalent general practitioner	1760 (299)	1839 (344)	1800 (322)
No of patients booked per hour with general practitioner	7.7 (1.9)	8.6 (2.8)	8.1 (2.4)
General practitioner consultation time (min)	8.2 (1.8)	7.6 (2.1)	7.9 (1.9)
Extra patients booked per general practitioner per surgery	2.7 (1.8)	3.1 (3.8)	2.9 (2.9)
No of patients booked per hour with practice nurse	6.1 (1.9)	6.4 (3.1)	6.2 (2.5)
Practice nurse consultation time (min)	11 (4.5)	11.1 (4.3)	11.1 (4.4)