Table 2.

Confidence interval width, coverage probability, estimated standard error (SE), and empirical SE for mixed effects analysis, with 40% missingness in sample variances, β₁ = 1.5, τ² = 2, and ${\tau }_b^2=2$. NM is no missingness, MI is multiple imputation using gamma meta-regression, ME is mean imputation, SGR is single imputation using gamma meta-regression, SLM is single imputation using linear regression based on the log-variance, and CC is complete case analysis.

β1 = 1.5	Width	Coverage	Estimated SE	Empirical SE
NM	0.952	0.928	0.243	0.250
MI	1.104	0.946	0.282	0.279
ME	1.024	0.887	0.261	0.320
SGR	1.002	0.921	0.256	0.269
SLM	0.978	0.909	0.250	0.277
CC	1.165	0.920	0.297	0.307