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Table 2 Correlations of State-level BRFSS to State-level Prescription Drug Filled

From: Correlating pharmaceutical data with a national health survey as a proxy for estimating rural population health

  1999 2000 2001 2002 2003
BRFSS Q: "Have you ever been told by a doctor that you have diabetes?" correlated with diabetes prescriptions filled 0.588 a 0.609 a 0.625 a 0.695 a 0.713 a
N (50 states plus the District of Columbia) 51 51 51 51 51
BRFSS Diabetes (State-level):      
Meanb 5.59% 6.05% 6.45% 6.66% 7.14%
Standard Deviation 0.95% 0.87% 1.24% 1.20% 1.31%
Prescriptions-Filled (State-level):      
Mean 3.38% 3.55% 3.76% 3.99% 4.13%
Standard Deviations 0.70% 0.73% 0.74% 0.78% 0.79%
Ratio of Rx/BRFSS rates 0.62 0.60 0.60 0.62 0.59
Prescriptions-Filled (County-level):      
Mean 2.22% 2.33% 2.47% 2.62% 2.73%
Standard Deviation 1.34% 1.41% 1.49% 1.59% 1.64%
N (counties) 3,103 3,103 3,103 3,103 3,103
  1. a= Correlation is significant at the 0.01 level (2-tailed)
  2. b = Mean of the state-level rates, not a computed national rate.