Table 1.

Empirical coverage of 95% confidence intervals for the treatment group mean after multiple imputation by PMM

ICC	Cluster size	Clusters	PMM	PMM	PMM	PMM	PMM	PMM
ρ	m	k	FE	dist	RE	draw	avg	IGN
0.03	4	100	99.0	98.2	98.7	95.1	95.4	95.5
	8	10	99.5	98.1	98.1	97.5	96.7	97.1
		20	98.4	96.6	96.8	94.9	94.9	95.2
		40	98.9	97.8	97.5	95.6	95.3	95.4
	40	10	98.9	98.4	98.9	96.1	94.9	94.4
		20	98.3	98.0	98.1	94.5	92.3	91.7
		40	98.0	98.0	98.2	94.0	92.1	91.0
	400	4	97.5	97.3	98.1	96.2	95.5	89.9
0.08	4	100	98.7	98.6	98.2	94.9	94.8	95.0
	8	10	98.9	97.5	98.0	96.7	95.0	96.0
		20	97.9	97.1	96.9	93.9	92.3	93.6
		40	98.9	98.7	98.2	95.0	93.7	94.2
	40	10	97.9	97.7	98.7	95.3	93.9	90.2
		20	97.6	97.4	97.6	93.8	92.8	86.9
		40	97.5	97.3	97.8	94.2	92.5	88.0
	400	4	96.7	96.6	97.6	96.2	96.2	86.1

Bolded values indicate coverage rates below 95%.

Italicized values indicate coverage rates above 95%.

Missing data were generated completely at random (MCAR) with a response rate of 60%, and data were imputed using an imputation model that correctly specified the covariate effects.