Disease seasonality estimation dataset for: Do psychiatric diseases follow annual cyclic seasonality?

Seasonal affective disorder famously follows annual cycles, with incidence elevation in the fall and spring. Should some version of cyclic annual pattern be expected from other psychiatric disorders? Would annual cycles be similar for distinct psychiatric conditions? This study probes these questions using two very large datasets describing the health histories of 150 million unique Americans and the entire Swedish population. We performed two types of analysis, using “uncorrected” and “corrected” observation. The former analysis focused on counts of daily patient visits associated with each disease. The latter analysis instead looked at proportion of disease-specific visits within the total volume of visits for a time interval. In the uncorrected analysis, we found that psychiatric diseases’ annual patterns were remarkably similar across the studied diseases in both countries, with the magnitude of annual variation significantly higher in Sweden than in the US for psychiatric, but not ...