Spatial clustering of codeine use and its association with depression: A geospatial analysis of nationally representative South African data

There is an alarming trend in sub-Saharan Africa in the use of codeine-containing pharmaceuticals, but its risk of common comorbidities, such as mental health, remains unquantified at a national-level. This study investigated the relationship between codeine use and onset of depression in South Africa at a population-level.
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