Figure 3.
Increasing and decreasing OVB due to conditioning on an uncorrelated confounder X. The two dark grey areas indicate an increasing OVB, with 100%–200% (lighter shade) and 200% or more (darker shade) remaining bias. The two light grey areas indicate a decreasing OVB, with 50%–100% (darker shade) and 50% or less (lighter shade) remaining bias.