add number_per_day to drug table

outcomesinsights / generalized_data_model

Outcomes Insights' Data Model for Clinical Research

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add number_per_day to drug table #93

Closed markdanese closed 7 years ago

markdanese commented 7 years ago

Days supplied is most commonly used in research, but the raw data might not include this information explicitly. CPRD includes ndd which is the numeric daily dose, which is the number of items to be used each day. Hence, if quantity is 60 and ndd is 2 then the days supplied is 30. CPRD does not report days supplied.

marc-outins commented 7 years ago

Closed by 1640f86bdb7f036b7608d53c940a1184ffb4208a