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Table 1 Average percentage of missing values imputed outside the specified range using linear regression imputation, by scoring method

From: Comparison of methods for imputing limited-range variables: a simulation study

 

GHQ raw scale

GHQ transformed

 

% imputed below lower bound

% imputed above upper bound

% imputed below lower bound

% imputed above upper bound

Scoring method

MCAR

MAR

MCAR

MAR

MCAR

MAR

MCAR

MAR

Likert

2.0

2.0

0.0

0.0

0.0

0.0

0.2

0.2

C-GHQ

12.2

11.6

0.1

0.1

7.9

7.4

1.8

0.2

Standard

23.0

24.0

0.0

0.0

14.3

14.9

6.5

7.5

  1. Note: Mean number of missing values per dataset is 238.