Table 2.

Pearson's Correlation Coefficients for Price Index Methodologies, 2012, MSAs with 15%+ of the PPO Population

		Implied Price Measure	Laspeyres Price Indices
			Sentinel Services						Market Basket
			Office Visit	Brain MRI	Joint Replacement	Childbirth	Colectomy	Pneumonia Hospitalization	Narrow Basket	Broad Basket
Implied price measure		1	0.72 (<.0001)	0.76 (<.0001)	0.62 (<.0001)	0.43 (<.0001)	0.51 (<.0001)	0.29 (<.0001)	0.97 (<.0001)	0.97 (<.0001)
Sentinel services	Office visit		1	0.57 (<.0001)	0.36 (<.0001)	0.26 (<.0001)	0.29 (0.01)	0.09 (0.17)	0.80 (0.0001)	0.76 (0.0001)
	Brain MRI			1	0.35 (0.09)	0.14 (0.04)	0.26 0.0001	0.09 (0.18)	0.81 (<.0001)	0.82 (<.0001)
	Joint replacement				1	0.31 (<.0001)	0.45 (<.0001)	0.29 (<.0001)	0.53 (<.0001)	0.51 (<.0001)
	Childbirth					1	0.42 (<.0001)	0.41 (<.0001)	0.35 (<.0001)	0.33 (<.0001)
	Colectomy						1	0.28 (<.0001)	0.43 (<.0001)	0.41 (<.0001)
	Pneumonia hospitalization							1	0.22 (<.0006)	0.20 (<.0023)
Market basket	Narrow basket								1	0.99 (<.0001)
	Broad basket									1