Figure 5.

Add-one and minus-one patterns for a starting adjustment-variable set of{C1}based on DAG in Figure2, taking the associations in the DAG in Figure1as the unknown best working DAG. The solid horizontal line is the RD estimate adjusted on the putative minimally sufficient set {C1}. The dashed horizontal lines are the pre-defined meaningful change thresholds in the RD estimate. The add-one section shows the RD upon adding each variable listed to the adjustment-variable set in turn. The minus-one section shows the RD upon removing each variable listed from the adjustment-variable set in turn.

Evans et al. BMC Medical Research Methodology 2012 12:156   doi:10.1186/1471-2288-12-156
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