Journal Guidelines for EHP from their official website

  • EHP will consider papers from dissertations that have been published in their entirety by a university in partial fulfillment of a degree.
  • For each manuscript, authors must submit a competing financial interests declaration form. On top of that, authors need to FURTHER indicated in the acknowledgement section.
  • For research articles, the word count is 7000, excluding references tables figures and acknowledgements and supplementary information. No way I am going to go over that.
  • Line number is mandatory!
  • Acknowledgements should be on the first page not last
  • They want a shorter title beside the long title, need to think about it.
  • Abstract needs to be equal or less than 250 words, structured with labels: background, objective, methods, results, conclusions
  • Main text has labels: introduction, methods, results, discussions, and conclusions. All subsection title needs to be fewer than 8 words.
  • References, Tables, and Figure Legends needs to be following the main text. Figures and supplementary material will be provided as separate files.
  • All references need to be author year. List alphabetically.
  • Do not use foot notes.
  • Confidence interval must be in the same column as the point estimation.


Today I learned that

  • Conditional Logistic Regression model with time-varying independent variables can be implemented through Cox proportional hazard function ‘coxph’ in combination with a survival object Surv. Always have wondered about this.


Statistical Method

  • Regression Discontinuity and Interrupted Time Series analysis has long confused me. I found a presentation of University of Washington that discusses the differences. It is almost the only place that I found this information.  It seems like the biggest difference is that ITS relies on population data and RD on individual data. Overall RD is more robust than ITS.


  • Conditional equations in Latex. Answers from here.
  • \[
        \frac{x^2-x}{x},& \text{if } x\geq 1\\
        0,              & \text{otherwise}

    However, This code generate equation without numbering. To change it, we remove \[ and \] and replace with \begin{equation} and \end{equation}. Another thing to modify is when we write functions this why, the format of \sum becomes its in-line format – the beginning and end of the range of independent variable appears to the right of the capital sigma. To change that, use \sum\limits_{i=1}^{m_y} instead of \sum_{i=1}^{m_y}.