Seasonal variation of cancer mortality in Hungary between 1984 and 2013

Abstract

Aims: Despite decreasing trends, Hungary is the leader in cancer mortality among European countries. We examined the seasonal variation of cancer mortality in Hungary between 1984 and 2013. Methods: Hungarian monthly cancer mortality and population data were used in the analysis. The Walter–Elwood method was used to determine seasonal variation in both mortality rates and proportionate mortality. Results: Significant winter-peak seasonality was found in all-cancer mortality. A similar seasonal trend with a peak from November to January was observed in death rates from colorectal, lung, female breast, prostate, bladder, brain, lymphoid and hematopoietic cancers. However, no more cyclical variation was identified in the mortality rates from other cancers. In addition, significant seasonal variation in proportionate mortality was shown for all cancer sites examined, with a peak in August or September. Conclusions: This study presents the seasonality pattern of different types of cancer mortality which might be related to environmental factors (e.g. infections).