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Table 4 Empirical coverage of 95% confidence intervals for β2 after parametric multiple imputation

From: Multiple imputation by predictive mean matching in cluster-randomized trials

ICC

Cluster size

Clusters

NORM

NORM

NORM

ρ

m

k

FE

RE

IGN

0.03

4

100

95.3

96.4

96.1

 

8

10

97.7

97.7

97.1

  

20

95.8

97.0

97.0

  

40

96.5

96.2

96.4

 

40

10

98.7

98.4

98.4

  

20

96.4

96.5

96.8

  

40

95.7

95.8

95.9

 

400

4

100

100

100

0.08

4

100

95.2

96.5

96.2

 

8

10

97.6

97.6

96.9

  

20

95.9

96.9

96.9

  

40

96.2

95.9

96.5

 

40

10

98.6

98.3

98.4

  

20

96.4

96.6

96.7

  

40

95.8

95.6

96.1

 

400

4

100

100

100

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.