Department of Biostatistics and Epidemiology, School of Public Health, Seoul National University, 599 Gwanak-Ro, Gwanak-Gu, Seoul, 151-752, South Korea.
Int J Biometeorol. 2012 Jan;56(1):33-42. doi: 10.1007/s00484-010-0395-0. Epub 2011 Jan 6.
Rapid temperature changes within a single day may be critical for populations vulnerable to thermal stress who have difficulty adjusting themselves behaviorally and physiologically. We hypothesized that diurnal temperature range (DTR) is associated with mortality, and that this association is modified by season and socioeconomic status (SES). We evaluated meteorological and mortality data from six metropolitan areas in Korea from 1992 to 2007. We applied generalized linear models (GLM) for quantifying the estimated effects of DTR on mortality after adjusting for mean temperature, dew point temperature, day of the week, and seasonal and long-term trends. Most areas showed a linear DTR-mortality relationship, with evidence of increasing mortality with increasing DTR. Deaths among the elderly (75 years or older), females, the less educated, and the non-hospital population were associated more strongly with DTR than with the corresponding categories. DTR was the greatest threat to vulnerable study populations, with greater influence in the fall season. DTR was found to be a predictor of mortality, and this relationship was modified by season and SES.
在一天内温度的快速变化可能对那些难以在行为和生理上适应的容易受到热应激影响的人群至关重要。我们假设昼夜温差（DTR）与死亡率有关，并且这种关联会受到季节和社会经济地位（SES）的影响。我们评估了韩国六个大都市区从 1992 年到 2007 年的气象和死亡率数据。我们应用广义线性模型（GLM），在调整平均温度、露点温度、星期几以及季节性和长期趋势后，量化 DTR 对死亡率的估计影响。大多数地区显示出 DTR 与死亡率之间的线性关系，表明 DTR 增加与死亡率增加有关。与相应类别相比，老年人（75 岁或以上）、女性、受教育程度较低和非住院人群的死亡与 DTR 的关系更为密切。DTR 对弱势研究人群构成了最大威胁，秋季的影响更大。研究发现，DTR 是死亡率的预测因素，这种关系受到季节和 SES 的影响。
