Description

Amor et al studied factors associated with outcome in patients with spondyloarthropathy. The authors are from Rene Descartes University in Paris, France.


Parameters identified during univariate analysis:

(1) hip arthritis

(2) erythrocyte sedimentation rate

(3) efficacy of NSAIDS

(4) lumbar spine movement

(5) sausage-like finger or toe

(6) oligoarthritis

(7) age of onset

 

Parameter

Finding

Points

hip arthritis

absent

0

 

present

4

erythrocyte sedimentation rate (ESR)

<= 30 mm/h

0

 

> 30 mm/h

3

efficacy of NSAIDS

fair to excellent

0

 

poor

3

lumbar axis

no limitations

0

 

limitation

3

sausage-like finger or toe

absent

0

 

present

2

oligoarthritis

absent

0

 

present

1

age of onset

<= 16 years

1

 

> 16 years

0

 

number of factors present =

= SUM(parameters with positive findings)

 

score =

= SUM(points for all 7 items)

 

Interpretation:

• minimum score: 0

• maximum score: 17

 

Data

Outcome

Sensitivity

Specificity

no factors present (score 0)

mild

92.5%

78%

score <= 3 at entry

mild

92.5%

78%

hip arthritis present

severe; mild outcome excluded

50%

 

3 factors present

severe; mild outcome excluded

50%

 

score >= 7 at entry

severe

50%

97.5%

 


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