Fig. 1
From: Re-expressing coefficients from regression models for inclusion in a meta-analysis
Plot of simulated values of y as a function of x from y = ln(x)(curve), along with slopes obtained by four methods (diagonal lines). The gold solid line represents a slope (βEstimand) fitted with the model y = α + βx. The three dashed lines are estimates of βEstimand obtained by the re-expression methods described in the text. Vertical lines indicate the first and third quartiles of the x-values. The intercepts of the diagonal lines have been adjusted to emphasize the similarity of the slopes in the interquartile range