Table 2.

Characteristics of the participating GPs and groups

	Arm A	Arm B	p
Number of groups	10	11	0.40
Number of practices	39	49	0.45
Mean group size (GPs per group)	8.1 (0.64a)	10.55 (1.70a)	0.20
Mean group level	2.70 (0.26a)	2.82 (0.33a)	0.78
No. of men (n total)	53 (81)	78 (116)	0.791
Mean age of GPs	47.9 (0.91a)	47.1 (0.77a)	0.538

^aStandard deviation