Skip to main content

Advertisement

Table 2 An example of purchase history, consisting of five purchases; each of 10 DDDs and average dose is one DDD per day

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

Purchase i 1 2 3 4 5
DDD 10 10 10 10 10
Days between i and i + 1 10 5 15 10 NA
DDD per day to next purchase 1,00 2,00 0,67 1,00 NA
Sliding temporal average DDDAVGi 1,09 1,33 0,80 0,92 1,00
Calculated refill time length in days 9,17 7,50 12,50 10,83 10,00
  1. The second purchase shows a possible example of stockpiling and the third purchase suggests the use of this stock.