Table 2 Complete case and multiple imputed model compositions for the outcome measure persistent shoulder disability

persistent shoulder disability*

72 (12.3%)

inability to perform daily activities

8 (1.4%)

1

4

shoulder complaints in the past year

27 (4.6%)

2

both shoulders afflicted

0 (0%)

3

3

concomitant lower back pain

0 (0%)

4

1

concomitant lower extremity pain

0 (0%)

5

more disability at baseline

2 (0.3%)

6

7

longer duration of complaints

1 (0.2%)

2

higher scores for somatisation

3 (0.5%)

5

higher scores for external locus of control

33 (5.6%)

6

older age

0 (0%)

8