Alternative Equation Formats

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MathML

\begin{array}{rcl} {\hat{σ}}^{2} & = & \hat{V a r} (\log ({O R}_{M H})) \\ = & \frac{\sum_{h} (n_{h 11} + n_{h 22}) (n_{h 11} n_{h 22}) / n_{h}^{2}}{2 {(\sum_{h} n_{h 11} n_{h 22} / n_{h})}^{2}} \\ + \frac{\sum_{h} [(n_{h 11} + n_{h 22}) (n_{h 12} n_{h 21}) + (n_{h 12} + n_{h 21}) (n_{h 11} n_{h 22})] / n_{h}^{2}}{2 (\sum_{h} n_{h 11} n_{h 22} / n_{h}) (\sum_{h} n_{h 12} n_{h 21} / n_{h})} \\ + \frac{\sum_{h} (n_{h 12} + n_{h 21}) (n_{h 12} n_{h 21}) / n_{h}^{2}}{2 {(\sum_{h} n_{h 12} n_{h 21} / n_{h})}^{2}} \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \hat{\sigma }^2 & = & \widehat{\mr{Var}}(~ \log (\mr{OR}_{\scriptstyle \mr{MH}})~ ) \\[0.10in]& = & \frac{\sum _ h (n_{h11} + n_{h22}) (n_{h11} ~ n_{h22}) / n_ h^2}{2 \left( \sum _ h n_{h11} ~ n_{h22} / n_ h \right)^2} \\[0.10in]& & + ~ \frac{\sum _ h [ (n_{h11} + n_{h22})(n_{h12} ~ n_{h21}) + (n_{h12} + n_{h21})(n_{h11} ~ n_{h22}) ] / n_ h^2}{2 \left( \sum _ h n_{h11} ~ n_{h22} / n_ h \right) \left( \sum _ h n_{h12} ~ n_{h21} / n_ h \right)} \\[0.10in]& & + ~ \frac{\sum _ h (n_{h12} + n_{h21}) (n_{h12} ~ n_{h21}) / n_ h^2}{2 \left( \sum _ h n_{h12} ~ n_{h21} / n_ h \right)^2} \end{eqnarray*}