从 Matchit 中提取 SMD 到 gtsummary

Question

i would like to extract the SMD values from MatchIt https://cran.r-project.org/web/packages/MatchIt/vignettes/assessing-balance.html#recommendations-for-balance-assessment

into a gt summary table

library("MatchIt") library("gtsummary")

data("lalonde", package = "MatchIt")

#1:1 NN matching w/ replacement on a logistic regression PS
m.out <- matchit(treat ~ age + educ + race + married + 
                   nodegree + re74 + re75, data = lalonde,
                 replace = TRUE)
m.out

summary(m.out)

Is there any option to extract the SMD values from the summary function? Thank you very much

Answer 1

What do you mean by SMD? You can save the summary into a new object with s <- summary(m.out) and then use View(s) to dig through the generated list. If you want to extract the Std. Mean Diff. Std. Mean Diff. you can do so like that:

summary(m.out)[["sum.all"]][, "Std. Mean Diff."]
#>    distance         age        educ   raceblack  racehispan   racewhite 
#>  1.79408605 -0.30944526  0.05496466  1.76154189 -0.34984254 -1.88186760 
#>     married    nodegree        re74        re75 
#> -0.82630927  0.24497023 -0.72108381 -0.29026291

^{Created on 2022-08-15 by the reprex package (v2.0.1)}