目前的代码没有添加协变量,求问如何往里添加协变量
library(mediation)
model.m <- lm(A2M_p99NA_Cubic_spline~sta_pm2.5_day_lag00, data=data_mediation_na.omit)
model.y <- lm(SBP_average~A2M_p99NA_Cubic_spline+sta_pm2.5_day_lag00, data=data_mediation_na.omit)
model<- mediate(model.m, model.y,treat="sta_pm2.5_day_lag00", mediator="A2M_p99NA_Cubic_spline",sims=50)
summary(model)
plot(model)