Do psychiatric diseases follow annual cyclic seasonality?

Seasonal affective disorder (SAD) 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 qu...

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Autores principales:	Hanxin Zhang, Atif Khan, Qi Chen, Henrik Larsson, Andrey Rzhetsky
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/9b3c30929407422e8674fa9d6a176e65
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spelling	oai:doaj.org-article:9b3c30929407422e8674fa9d6a176e652021-12-02T19:54:22ZDo psychiatric diseases follow annual cyclic seasonality?1544-91731545-788510.1371/journal.pbio.3001347https://doaj.org/article/9b3c30929407422e8674fa9d6a176e652021-07-01T00:00:00Zhttps://doi.org/10.1371/journal.pbio.3001347https://doaj.org/toc/1544-9173https://doaj.org/toc/1545-7885Seasonal affective disorder (SAD) 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 2 very large datasets describing the health histories of 150 million unique U.S. citizens and the entire Swedish population. We performed 2 types of analysis, using "uncorrected" and "corrected" observations. The former analysis focused on counts of daily patient visits associated with each disease. The latter analysis instead looked at the proportion of disease-specific visits within the total volume of visits for a time interval. In the uncorrected analysis, we found that psychiatric disorders' 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 United States for psychiatric, but not infectious diseases. In the corrected analysis, only 1 group of patients-11 to 20 years old-reproduced all regularities we observed for psychiatric disorders in the uncorrected analysis; the annual healthcare-seeking visit patterns associated with other age-groups changed drastically. Analogous analyses over infectious diseases were less divergent over these 2 types of computation. Comparing these 2 sets of results in the context of published psychiatric disorder seasonality studies, we tend to believe that our uncorrected results are more likely to capture the real trends, while the corrected results perhaps reflect mostly artifacts determined by dominantly fluctuating, health-seeking visits across a given year. However, the divergent results are ultimately inconclusive; thus, we present both sets of results unredacted, and, in the spirit of full disclosure, leave the verdict to the reader.Hanxin ZhangAtif KhanQi ChenHenrik LarssonAndrey RzhetskyPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Biology, Vol 19, Iss 7, p e3001347 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Hanxin Zhang Atif Khan Qi Chen Henrik Larsson Andrey Rzhetsky Do psychiatric diseases follow annual cyclic seasonality?
description	Seasonal affective disorder (SAD) 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 2 very large datasets describing the health histories of 150 million unique U.S. citizens and the entire Swedish population. We performed 2 types of analysis, using "uncorrected" and "corrected" observations. The former analysis focused on counts of daily patient visits associated with each disease. The latter analysis instead looked at the proportion of disease-specific visits within the total volume of visits for a time interval. In the uncorrected analysis, we found that psychiatric disorders' 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 United States for psychiatric, but not infectious diseases. In the corrected analysis, only 1 group of patients-11 to 20 years old-reproduced all regularities we observed for psychiatric disorders in the uncorrected analysis; the annual healthcare-seeking visit patterns associated with other age-groups changed drastically. Analogous analyses over infectious diseases were less divergent over these 2 types of computation. Comparing these 2 sets of results in the context of published psychiatric disorder seasonality studies, we tend to believe that our uncorrected results are more likely to capture the real trends, while the corrected results perhaps reflect mostly artifacts determined by dominantly fluctuating, health-seeking visits across a given year. However, the divergent results are ultimately inconclusive; thus, we present both sets of results unredacted, and, in the spirit of full disclosure, leave the verdict to the reader.
format	article
author	Hanxin Zhang Atif Khan Qi Chen Henrik Larsson Andrey Rzhetsky
author_facet	Hanxin Zhang Atif Khan Qi Chen Henrik Larsson Andrey Rzhetsky
author_sort	Hanxin Zhang
title	Do psychiatric diseases follow annual cyclic seasonality?
title_short	Do psychiatric diseases follow annual cyclic seasonality?
title_full	Do psychiatric diseases follow annual cyclic seasonality?
title_fullStr	Do psychiatric diseases follow annual cyclic seasonality?
title_full_unstemmed	Do psychiatric diseases follow annual cyclic seasonality?
title_sort	do psychiatric diseases follow annual cyclic seasonality?
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/9b3c30929407422e8674fa9d6a176e65
work_keys_str_mv	AT hanxinzhang dopsychiatricdiseasesfollowannualcyclicseasonality AT atifkhan dopsychiatricdiseasesfollowannualcyclicseasonality AT qichen dopsychiatricdiseasesfollowannualcyclicseasonality AT henriklarsson dopsychiatricdiseasesfollowannualcyclicseasonality AT andreyrzhetsky dopsychiatricdiseasesfollowannualcyclicseasonality
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Do psychiatric diseases follow annual cyclic seasonality?

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