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Table 2 Empirical coverage of 95% confidence intervals for the treatment group mean 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

99.4

96.2

95.3

 

8

10

99.6

98.0

97.4

  

20

99.2

96.3

95.6

  

40

99.6

96.7

96.0

 

40

10

99.2

97.7

94.6

  

20

98.5

95.8

91.8

  

40

98.4

95.1

91.6

 

400

4

97.8

97.5

90.6

0.08

4

100

99.3

95.6

94.8

 

8

10

99.4

97.4

96.0

  

20

98.8

95.5

93.7

  

40

99.3

96.1

94.7

 

40

10

98.3

96.2

90.9

  

20

97.6

94.9

86.9

  

40

97.3

95.2

88.3

 

400

4

96.8

96.5

86.7

  1. Bolded values indicate coverage rates below 95%.
  2. Italicized values indicate coverage rates above 95%.
  3. 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.