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Table 4 Complete case bootstrap model selection for the outcome measure persistent disability

From: The search for stable prognostic models in multiple imputed data sets

Ā 

most frequently selected models

rank

Predictors*

1

2

2

4

5

B

CCA

inability to perform daily activities

X

X

X

X

X

1

1

both shoulders afflicted

X

-

-

X

X

2

3

shoulder complaints in the past year

X

X

X

X

-

3

2

concomitant lower extremity pain

X

X

X

X

X

4

5

more disability at baseline

X

X

X

X

X

5

6

concomitant lower back pain

-

-

X

X

X

-

4

older age

-

-

-

-

-

-

-

longer duration of complaints

-

-

-

-

-

-

-

acute onset

-

-

-

-

-

-

-

Count

33

23

23

22

16

Ā Ā 

%

6.6

4.6

4.6

4.4

3.2

Ā Ā 
  1. *Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā - only those predictors that appeared in ā‰„40% of the first bootstrap model selection step are presented
  2. rankĀ Ā Ā Ā Ā Ā Ā - the order of appearance of predictors in the derived models arranged by their predictive ability (regression coefficient estimates)
  3. BĀ Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā - the complete case date based bootstrap selected model (i.e. the most frequently occurring combination of predictors in 500 replicate data sets of the second bootstrap model selection step)
  4. CCAĀ Ā Ā Ā Ā Ā Ā - the complete case data based model derived without additional bootstrap was the fourth most occurring combination of predictors in the bootstrap model selection procedure
  5. CountĀ Ā Ā Ā Ā - the number of times the model was selected in the 500 replicate data sets of the second bootstrap model selection step