Dear Friends, I'm using Matchit package for a Cohor Study. After match the number provided by the summary output apparently don't correspond to the true value: Here the values provided by summary:>summary (test) Summary of Balance for Matched Data Age: Means treated 44.89; Means control 45.47 However, after applying a test (for instance) I get: > mean in group control: 47.47 and for treated group: 44.89 Why the means differ between this 2 functions (summary and t-test)? Am I missing anything about the means generated by the summary command after match?There is no missing data. Thank you in advance for your help and patience. Thyago
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