Consolaro, A

Dalprà, S

Davì, S

Ferrari, C

Filocamo, G

Martini, A

Parodi, A

Ravelli, A

Schiappapietra, B

Verazza, S

Viola, S

Pediatric Rheumatology

English

PubMed

Springer - Publisher Connector

BioMed Central
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Pediatric Rheumatology
Open AccessPoster presentation
Comparison of physician's, parent's and patient's global ratings 
made on linear or 21-circle visual analogue scales (VAS) in juvenile 
idiopathic arthritis (JIA)
S Dalprà*, S Verazza, C Ferrari, A Parodi, S Davì, B Schiappapietra, 
A Consolaro, G Filocamo, S Viola, A Martini and A Ravelli
Address: IRCCS G Gaslini, Genova, Italy
* Corresponding author    
Background
Physician's and parent's global ratings of disease status in
JIA are assessed using a 10-cm linear VAS anchored at two
ends. However, such measure may lead to clustering of
scores at ends of scale. Furthermore, a ruler is required to
compute scores. Substitution of linear VAS with 21-circle
VAS (each circle = 0.5 cm) has been proposed to increase
feasibility and precision.
Objective
To compare construct validity of physician's and parent's
ratings made on linear or 21-circle VAS.
Methods
In 723 visits (2007–2008), the physician rated disease
activity and a parent rated child's well-being and pain on
21-circle VAS. A historical sample of 1429 visits (1988–
2006) including same assessments made on linear VAS
was used for comparison. Construct validity of VAS was
compared by calculating Spearman's correlations with
other JIA outcome measures.
Results
See table 1
Conclusion
21-circle VAS yielded better correlations for physician's
global assessment, whereas correlations for parent's rat-
ings were greater with linear VAS. This shows that overall
construct validity of the two scales is comparable.
from 15th Paediatric Rheumatology European Society (PreS) Congress
London, UK. 14–17 September 2008
Published: 15 September 2008
Pediatric Rheumatology 2008, 6(Suppl 1):P114 doi:10.1186/1546-0096-6-S1-P114
<supplement> <title> <p>15<sup>th </sup>Paediatric Rheumatology European Society (PreS) Congress</p> </title> <editor>Wietse Kuis, Patricia Woo, Angelo Ravelli, Hermann Girschick, Michaël Hofer, Johannes Roth, Rotraud K Saurenmann, Alberto Martini, Pavla Dolezova, Janjaap van der Net, Pierre Quartier, Lucy Wedderburn and Jan Scott</editor> <note>Meeting abstracts – A single PDF containing all abstracts in this Supplement is available <a href="http://www.biomedcentral.com/content/files/PDF/1546-0096-6-S1-full.pdf">here</a>.</note> </supplement>
This abstract is available from: http://www.ped-rheum.com/content/6/S1/P114
© 2008 Dalprà et al; licensee BioMed Central Ltd. 
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Pediatric Rheumatology 2008, 6(Suppl 1):P114 http://www.ped-rheum.com/content/6/S1/P114
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Table 1: 
Parent global Parent pain Functional scale MD global Active joints
21-circle VAS
MD global 0.52 0.50 0.48* - 0.85
Parent global - 0.76 0.59* 0.52 0.44
10-cm VAS
MD global 0.57 0.57 0.43** - 0.62
Parent global - 0.81 0.57** 0.45
*JAFS; **CHAQ


Comparison of physician's, parent's and patient's global ratings made on linear or 21-circle visual analogue scales (VAS) in juvenile idiopathic arthritis (JIA)

S Dalprà

S Verazza

C Ferrari

A Parodi

S Davì

B Schiappapietra

A Consolaro

G Filocamo

S Viola

A Martini

A Ravelli

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file:///data/remote/core/dit/data/Springer-OA/pdf/57f/aHR0cDovL2xpbmsuc3ByaW5nZXIuY29tLzEwLjExODYvMTU0Ni0wMDk2LTYtUzEtUDExNC5wZGY=.pdf

Comparison of physician's, parent's and patient's global ratings made on linear or 21-circle visual analogue scales (VAS) in juvenile idiopathic arthritis (JIA)

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