Description
Balancing confounding variables is necessary to accurately estimate the causal effect between the exposure and outcome variables. Balance is determined using weighted correlations between the confounding variables and exposure variable. The Balance Type parameter specifies how to aggregate the weighted correlations (mean, median, or maximum), and the aggregated correlations are compared to the value of the Balance Threshold parameter. If the correlation is less than or equal to the threshold, the confounding variables are considered balanced.
Solution
Different options of the Propensity Score Calculation Method or Balancing Method parameters may resolve the error.
You are encouraged to first attempt to resolve the error through the selection of confounding variables, propensity score calculation method, and balancing method. If the error is still not resolved, use a different option of the Balance Type parameter or increase the value of the Balance Threshold parameter. Review the messages to determine the values of the weighted correlations to determine appropriate values.