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Fig. 5 | BMC Medical Research Methodology

Fig. 5

From: On the use of propensity scores in case of rare exposure

Fig. 5

Effect of the number of confounders. Bias of exposure effect, variability ratio, 1 - coverage and RMSE according to number of confounders (2 or 4 confounders) and mean sample size, for σ U,B =σ U,C =0.3, σ B,C =0, \(\exp (\delta _{B}) = \exp (\delta _{C}) = 1.5\), H R=1, r c =50 % and p=5 %, with weighting by inverse of PS using ATE and ATT weights and PS-matching

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