A graph showing a funnel plot for trials comparing endarterectomy versus stenting.

This is a scatter diagram entitled "Funnel plot of Standard Error by Log odds ratio". The horizontal axis shows log odds ratio and has scale marked from minus 4 to 4. The vertical axis shows Standard error and has scale marked from 0.0 at the top to 2.0 at the bottom, the reverse of the usual scale marking. There is a vertical line showing the position of the combined effect at log odds ratio = minus 0.4. Sloping lines go from an apex at log odds ratio = minus 0.4, standard error = 0.0 to log odds ratio = minus 4, standard error = 1.8 and to log odds ratio = plus 3.5, standard error = 2.0.

There are 9 points plotted, at log odds ratio = minus 3.1, standard error = 1.6, log odds ratio = minus 1.1, standard error = 0.5, log odds ratio = minus 1.0, standard error = 0.4, log odds ratio = minus 0.6, standard error = 0.2, log odds ratio = minus 0.2, standard error = 0.2, log odds ratio = 0.0, standard error = 0.3, log odds ratio = 0.1, standard error = 0.5, log odds ratio = 1.2, standard error = 1.6, log odds ratio = 1.2, standard error = 1.7.

All points are between the sloping lines.

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This page maintained by Martin Bland.

Last updated: 18 February, 2009.