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Table 4 Reviewers’ judgments on the correctness of placing a purchase in a correct drug use period (purchase test)

From: From prescription drug purchases to drug use periods – a second generation method (PRE2DUP)

Purchases Reviewer HT Total
Correct Error Not Solvable
Reviewer Correct 867 17 7 891
MK Error 16 39 2 57
  Not Solvable 14 9 29 52
  Total 897 65 38 1000