研究发现夏令时对睡眠时长的影响因纬度而异，高纬度地区反而睡得更久。
Some patterns of sleep quality and Daylight Saving Time across countries: a predictive and exploratory analysis
- 按是否实行夏令时分组，对比61国平均睡眠时长
- 低纬度地区实行夏令时的国家睡眠更短，高纬度则更长
- 揭示地理纬度是影响夏令时睡眠效果的关键因素
本研究分析了61个国家的平均睡眠时长，以考察夏令时（DST）实践的影响。识别出影响睡眠的关键指标，并通过统计相关性分析探索各因素间关系。根据夏令时实施情况对国家分组，可视化对比了实行与未实行夏令时地区的睡眠模式。结果显示，总体上实行夏令时的国家报告的睡眠时长更长。进一步按纬度分析发现：在低纬度地区，实行夏令时的国家平均睡眠时长较短；而在高纬度地区，实行夏令时的国家睡眠时长更长。这些结果表明，夏令时对睡眠的影响可能受地理纬度调节。
原文摘要 · Abstract (English)
In this study we analyzed average sleep durations across 61 countries to examine the impact of Daylight Saving Time (DST) practices. Key metrics influencing sleep were identified, and statistical correlation analysis was applied to explore relationships among these factors. Countries were grouped based on DST observance, and visualizations compared sleep patterns between DST and non-DST regions. Results show that, on average, countries observing DST tend to report longer sleep durations than those that do not. A more detailed pattern emerged when accounting for latitude: at lower latitudes, DST-observing countries reported shorter sleep durations compared to non-DST countries, while at higher latitudes, DST-observing countries reported longer average sleep durations. These findings suggest that the influence of DST on sleep may be moderated by geographical location.
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