報告題目：Estimating the Dynamic Diarrhea Effects on Childhood Growth with Statistical Models
報 告 人：周建輝 副教授 弗吉尼亞大學
報告時間：2020年6月30日 09:30-10:30
報告地點：騰訊會議ID：787 992 665
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校内聯系人：程建華 chengjh@jlu.edu.cn
報告摘要：
Diarrhea effects on children health have been a popular topic in biomedical research. Previous studies have focused on short term effect on mortality and morbidity. Recent evidence has raised interests on the long term effect on childhood growth. Instead of treating diarrhea effect as constant as what previous studies do, we propose a dynamic nonparametric model to estimate diarrhea effect as a function, studying how long the diarrhea effect lasts and its changes over time. Simulation study shows that our model can capture the length of diarrhea effect and quantify the effect curve simultaneously. The proposed model is applied to the data from NIH cohort study collected from children in Bangladesh. Results show that the diarrhea effect on children’s HAZ score starts to show up at 3 months, becomes most significant at around 9 months with a decrease of HAZ -0.013, and levels off to zero after 15 months. Overall, our model provides new statistical tools to quantify the relationship between diarrhea and childhood growth in a dynamic fashion, which gives us insights on the changing pattern and the effect window of diarrhea effect.
報告人簡介：
周建輝，弗吉尼亞大學統計學院副教授，2000年本科畢業于中國科學技術大學，2005年博士畢業于伊利諾伊大學厄巴納-香槟分校，主要從事縱向數據分析、函數型數據分析、降維方法、穩健統計、生長曲線模型和分位回歸等方向的研究，在Annals of Statistics、Journal of the American Statistical Association和Biometrics、Statistical Methods in Medical Research等期刊上發表高質量科研論文20餘篇，曾擔任Statistica Sinica等期刊副主編。
