RT Journal Article T1 Sample size bias in the empirical assessment of the acute risks associated with daylight saving time transitions A1 Martín Olalla, José María A1 Mira Pérez, Jorge K1 DST K1 Summer time K1 Latitude K1 Sleep derivation K1 Spring transition K1 Europe K1 Insolation K1 Season K1 Motor vehicle accidents AB The assessment of the acute impact of daylight saving time (DST) transitions is a question of great interest for an understanding of the benefits and inconveniences of a practice that is now under public scrutiny in Europe and America. Here, we report a thorough analysis of a record of 13 well-known research studies that reported increased risks associated with DST transitions in health issues – acute myocardial infarction, ischemic strokes and trauma admissions – and in societal issues – accidents, traffic accidents and fatal motor vehicle accidents. We found that a five percent increase of the risks suffices to understand the reported increased risks associated with the spring transition. Reported values above this threshold are impacted by the sample size of the study. In the case of the autumn transition, no increase in the risks is found. PB Taylor and Francis YR 2023 FD 2023-01-03 LK http://hdl.handle.net/10347/32427 UL http://hdl.handle.net/10347/32427 LA eng NO Martín Olalla, J.M. y Mira, J. (2023). Sample size bias in the empirical assessment of the acute risks associated with daylight saving time transitions. Chronobiology International, 40 (2), 186-191. https://doi.org/10.1080/07420528.2022.2157738 NO This is an Accepted Manuscript version of the following article, accepted for publication in Chronobiology International: The Journal of Biological and Medical Rhythm Research. [Martín Olalla, J.M. y Mira, J. (2023). Sample size bias in the empirical assessment of the acute risks associated with daylight saving time transitions. Chronobiology International, 40 (2), 186-191]. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. DS Minerva RD 29 abr 2026