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Table 7 Distribution of reviewer judgments by ATC classes on the correctness of drug use periods

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

  Classification Total   %  
Correct Error Not solvable Correct Error Not solvable
ATC class A 117 7 5 129 91 5 4
B 24 2 0 26 92 8 0
C 135 4 34 173 78 2 20
G 32 7 0 39 82 18 0
H 11 6 1 18 61 33 6
J 104 43 0 147 71 29 0
M 77 3 12 92 84 3 13
N 217 5 2 224 97 2 1
R 31 5 9 45 69 11 20
OTHER 38 2 67 107 36 2 63
Total 786 84 130 1000 79 8 13
  1. The category “OTHER” included classes D, L, P, S and V. These have been combined, due to the low numbers of purchases and poor data quality (high proportion of missing DDD values). The common names of ATC classes are found in Table 1.