Correction to: BMC Med Res Methodol 21, 109 (2021)
https://doi.org/10.1186/s12874-021-01282-1
Following publication of the original article [1], the authors noticed an error in Fig. 2, and some cropping of the text in Fig. 3. Presented here are the updated Figs. 2 and 3. The original article has been updated.
Matching covariate standardized mean differences after large-scale propensity score matching (PSM) and cardinality matching (CM). Fine balance: exact marginal distributional balance. Violin plots illustrate kernel probability density; the width of the shaded area represents the proportion of observations with the corresponding y-axis value
Candidate covariate standardized mean differences after large-scale propensity score matching (PSM) and cardinality matching (CM). Fine balance: exact marginal distributional balance. Violin plots illustrate kernel probability density; the width of the shaded area represents the proportion of observations with the corresponding y-axis value
Reference
Fortin SP, Johnston SS, Schuemie MJ. Applied comparison of large-scale propensity score matching and cardinality matching for causal inference in observational research. BMC Med Res Methodol. 2021;21(1):109. https://doi.org/10.1186/s12874-021-01282-1.
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Fortin, S.P., Johnston, S.S. & Schuemie, M.J. Correction to: Applied comparison of large-scale propensity score matching and cardinality matching for causal inference in observational research. BMC Med Res Methodol 21, 174 (2021). https://doi.org/10.1186/s12874-021-01365-z
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DOI: https://doi.org/10.1186/s12874-021-01365-z