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Table 4 Summary of median price ratios (MPR) of the surveyed prescription medicines in retail pharmacies

From: Evaluating availability and price of essential medicines in Boston area (Massachusetts, USA) using WHO/HAI methodology

4(a). All Medicines analysis
  Overall Chain Pharmacies Independent Pharmacies
  Originator Brand
(medicines = 10)
Lowest Price Generic
(medicines = 13)
Originator Brand
(medicines = 8)
Lowest Price Generic
(medicines = 12)
Originator Brand
(medicines = 3)
Lowest Price Generic
(medicines = 10)
Median MPR 158.14 38.03 180.29 39.54 188.56 31.28
Minimum, Maximum MPR 16.43, 655.09 12.52, 155.46 29.29, 663.30 19.15, 168.73 29.52, 655.09 5.37, 122.38
4(b). Matched pair analysis
  Overall Chain Pharmacies
  Originator Brand Lowest Price Generic Originator Brand Lowest Price Generic   
       OB-LPG pairs = 10      OB-LPG pairs = 8
Median MPR 158.14 35.15 180.29 39.54   
Minimum, Maximum MPR 16.43, 655.09 12.52, 98.57 29.29, 663.30 28.73, 115.79   
  1. In 'all medicines' analysis, overall median MPRs of originator brand (OB) and lowest price generic (LPG) versions of the prescription medicines were statistically different (p-value = 0.04). In chain pharmacies, the median MPRs of OB and LPG versions were statistically different (p-value < 0.05). Significance could not be calculated among independent pharmacies due to low availability of originator products.
  2. In 'matched pair' analysis, too few pairs of sampled prescription medicines were available in independent pharmacies to make meaningful comparisons within such facilities. The overall median MPRs of the OB and LPG versions of prescription medicines were statistically different (p-value = 0.03), both overall and in case of chain pharmacies