mates. Each row represents a deleted clade. Columns report the calculated
regression intercept (<code>intercept</code>), difference between simulation
intercept and full model intercept (<code>DIFintercept</code>), the standardised
difference (<code>sDIFintercept</code>), the percentage of change in intercept compared
to the full model (<code>intercept.perc</code>) and intercept p-value
(<code>pval.intercept</code>). All these parameters are also reported for the regression
slope (<code>DIFestimate</code> e