Hello, I am conducting a proportion meta-analysis but when I try to run a meta-regression, there's always an error message. Please find below the code.
mlbcon<-metaprop(event = event.lb, n = n, data = infdata, studlab = paste(Author, Year, sep = ","), comb.fixed = FALSE, comb.random = TRUE, method = "GLMM", method.tau = "ML", method.ci = "CP", prediction = TRUE)
Error in rma.glmm(xi = event[!exclude], ni = n[!exclude], data = dataset, :
Number of parameters to be estimated is larger than the number of observations.
Can someone help me? Happy to provide more information.