Alternative Equation Formats

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MathML

\begin{aligned} N & = # subjects (NTOTAL) \\ K & = # predictors \\ x & = (x_{1}, \dots, x_{K})^{'} = vector of predictors \\ x_{1} & = predictor of interest \\ x_{- 1} & = (x_{2}, \dots, x_{K})^{'} \\ h (t | x) & = hazard function for survival time given x, evaluated at time \Mathtext{t} \\ h_{0} (t) & = baseline hazard at time \Mathtext{t} \\ h_{r} & = hazard ratio for one-unit increase in x_{1} (HAZARDRATIO) \\ p_{e} & = P r o b (event is uncensored) (EVENTPROB) \\ σ & = standard deviation of x_{1} (STDDEV) \\ ρ & = C o r r (x_{- 1}, x_{1}) \\ R^{2} & = ρ^{2} = R^{2} value from regression of x_{1} on x_{- 1} (RSQUARE) \end{aligned}

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Math as LaTeX Source

\begin{align*} N & = \# \text {subjects}\quad (\text {NTOTAL}) \\ K & = \# \text {predictors} \\ \mb{x} & = (x_{1}, \ldots , x_{K})' = \text {vector of predictors} \\ x_1 & = \text {predictor of interest} \\ \mb{x}_{-1} & = (x_{2}, \ldots , x_{K})' \\ h(t|\mb{x}) & = \text {hazard function for survival time given $\mb{x}$, evaluated at time \Mathtext{t}} \\ h_0(t) & = \text {baseline hazard at time \Mathtext{t}} \\ h_\mr {r} & = \text {hazard ratio for one-unit increase in $x_1$} \quad \text {(HAZARDRATIO)} \\ p_ e & = \mr{Prob} (\text {event is uncensored}) \quad (\text {EVENTPROB}) \\ \sigma & = \text {standard deviation of $x_1$} \quad \text {(STDDEV)} \\ \rho & = \mr{Corr}(\mb{x}_{-1}, x_1) \\ R^2 & = \rho ^2 = \text {$R^2$ value from regression of $x_1$ on $\mb{x}_{-1}$} \quad (\text {RSQUARE}) \\ \end{align*}