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Discriminative ability
Finally, the ASAS-HI was discriminative between the four health states of the ASDAS score (inactive, moderate, high and very high disease activity). The groups with greater disease activity had higher mean ASAS HI scores than those with lower disease activity. Results are given in table 3.
Table 3 Discriminant ability of ASAS-HI stratified by disease activity
Inactive (n=8)
ASAS-HI 2.5 ± 5.9
BASDAI 1.2 ± 0.5
All values given as mean±SD
ASDAS status groups Moderate
(n=12) 5.9 ± 3.0 3.6 ± 1.0
High (n=19) 9.4 ± 3.9 5.8 ± 1.5
Very high (n=5) 13.6 ± 2.0 6.8 ± 0.4
ASAS HI, The Assessment of Spondyloarthritis international Society Health Index; BASDAI, Bath ankylosing spondylitis activity disease index; ASDAS, Ankylosing Spondylitis Disease Activity Score.
DISCUSSION
The translated and culturally adapted version of the ASAS-HI reported in the current study maintains all the properties of the original English-language version of the questionnaire. The procedure implemented to translate the instrument followed a standardized operating procedure according to the recommendations published by Beaton 8. Further we tested several aspects of its validity, relevance and comprehensibility among patients with SpA. Therefore, the health status and functioning in Spanish-speaking patients with SpA may be properly assessed with the translated version of the original ASAS-HI.
The psychometric properties of this Spanish-language version of the ASAS-HI were consistent with the results found in the original study 6, and also with the study of the validity of the Korean- language translation15. The reliability of the adapted version showed a good test-retest reliability
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