Skip to main content
Fig. 3 | BMC Medical Research Methodology

Fig. 3

From: Consequences of ignoring clustering in linear regression

Fig. 3

Ratios of standard errors estimated from RI and OLS models (\({\mathrm{S}\mathrm{E}}_{{\mathrm{\beta }}_{1}^{\mathrm{R}\mathrm{I}}}\)/\({\mathrm{S}\mathrm{E}}_{{\mathrm{\beta }}_{1}^{\mathrm{O}\mathrm{L}\mathrm{S}}}\)) plotted against dispersion (expressed as SD) of the mean value/prevalence of \({x}_{ij}\) across the clusters within each sample. Results for different levels of intraclass correlation coefficient are distinguished by shades of grey as indicated in the legend. A Continuous \({x}_{ij}\). B Binary \({x}_{ij}\)

Back to article page