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The observed average duration of treatment expresses an approach of the number of days of treatment observed among insured persons. This indicator is part of a longitudinal monitoring.


Let us take the example of a box containing 30 capsules (BU or base units) each containing 50 milligrams of the active principle PA, for which 1,000 UA of this product has been dispensed. over a period for a separate number of 500 social security insured.
Consider that this product is administered orally, the DDD, defined by WHO, for the class of this product for oral administration is 300 MG per day.
The total DDD of 1 box is: (30 capsules x 50 MG) / 300 MG / d = 5 days, expressing the number of days of treatment of this product according to the WHO recommendations.

The observed average duration of treatment is:
Volume in average UC per social insured x total DDD of 1 box
Either: [1,000 UC dispensed / 500 social insured] x 5 days = 10 days


The average observed duration of treatment indicator can be translated into English as "Average observed duration of treatment".


This indicator is only available for pharmacies data and only for drugs with a WHO ATC class.


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