The variance-stabilizing Freeman-Tukey double arcsine transform was originally proposed for inference on single proportions. Subsequently, its use has been suggested in the context of meta-analysis of proportions. While some erratic behavior has been observed previously, here we point out and illustrate general issues of monotonicity and invertibility that make this transform unsuitable for meta-analysis purposes.
Keywords: Freeman-Tukey; prevalences; proportions; variance stabilizing transform.
© 2022 The Authors. Research Synthesis Methods published by John Wiley & Sons Ltd.