Table 1.

Pearson Correlation Matrix

				Socioeconomic	Standardized ACG Morbidity Index				Standardized Visit Ratio
			SMR	Risk Index	Total Costs		Physician Costs
			(<75 yrs)	(S.E.R.I.)	All Ages	<75y only	All Ages	<75y only	GPs only	Specialists
SMR (<75 yrs)			1.00	0.65	0.84	0.86	0.78	0.80	0.52	−0.24 ns
S.E.R.I.			—	1.00	0.66	0.68	0.56	0.57	0.39	−0.47
Standardized ACG	Total Cost	All Ages	—	—	1.00	0.98	0.96	0.95	0.58	0.00 ns
		<75y only	—	—	—	1.00	0.96	0.97	0.62	−0.01 ns
Morbidity Index	Physician	All Ages	—	—	—	—	1.00	0.99	0.65	0.12 ns
	Costs	<75y only	—	—	—	—	—	1.00	0.67	0.10 ns
Standardized	Visit Ratio	GPs only	—	—	—	—	—	—	1.00	−0.33
		Specialist	—	—	—	—	—	—	—	1.00

Note: Excludes 4 PSAs with proportion of ‘users’ less than 70%. Correlation coefficients all statistically at p <0.01 except where marked ‘ns’.