Table 11. Odds ratios (OR) and 95% confidence intervals (CI) for the significant predictors
of the Work Ability Index (WAI) after the follow-up. The final models were adjusted for age and baseline
WAI (1996) (n = 134), (EC = eyes closed).

 

WAI 1999
Model 1

 

WAI 1999
Model 2

 

WAI 1999
Model 3

Predictor

OR

CI

 

OR

CI

 

OR

CI

Functional balance (number of errors)

  Good <1

  Average 1

  Poor >1

 

 

1.0

1.0

3.6

 

 

 

0.5-2.2

1.0-12.7

 

 

 

 

 

 

Sway amplitude (EC) (mm)

  Good £6.0

  Average >6.0£7.5

  Poor >7.5

 

 

 

 

 

1.0

2.7

2.3

 

 

 

1.0-7.2

0.9-6.1

 

 

 

Perceived balance

  Good 4-5

  Moderate 3

  Poor 1-2

 

 

 

 

 

 

 

1.0

2.4

9.5

 

 

0.8-5.8

1.5-58.3

Age (years)

  30-34

  40-44

  50-54

 

1.0

4.4

37.8

 

 

1.8-10.9

9.7-147

 

 

1.0

4.9

33.1

 

 

1.8-13.7

8.0-137

 

 

1.0

4.0

27.0

 

 

1.6-10.2

6.9-106

WAI 1996

  Excellent

  Good

  Moderate

  Poor

 

1.0

3.3

18.4

53.3

 

 

1.3-8.2

5.4-62.2

6.3-452

 

 

1.0

3.9

27.9

82.9

 

 

1.4-11.0

7.0-111

6.0->999

 

 

1.0

2.7

13.7

30.4

 

 

1.0-6.7

3.7-50.5

3.5-265