Italian validation of INQoL, a quality of life questionnaire for adults with muscle diseases

作者：Sansone V A^*; Panzeri M; Montanari M; Apolone G; Gandossini S; Rose M R; Politano L; Solimene C; Siciliano G; Volpi L; Angelini C; Palmieri A; Toscano A; Musumeci O; Mongini T; Vercelli L; Massa R; Panico M B; Grandi M; Meola G

来源：European Journal of Neurology, 2010, 17(9): 1178-1187.

DOI：10.1111/j.1468-1331.2010.02992.x

• INQoL
• muscle diseases
• quality of life
• SF-36

Background and purpose:
A quality of life (QoL) questionnaire for neuromuscular diseases was recently constructed and validated in the United Kingdom in a sample of adult patients with a variety of muscle disorders. Preliminary results suggested it could be a more relevant and practical measure of QoL in muscle diseases than generic health measures of QoL. The purpose of our work was: (i) To validate INQoL in Italy on a larger sample of adult patients with muscle diseases (ii) to compare INQoL to SF-36.
Methods:
We have translated into Italian and applied language adaptations to the original UK INQoL version. We studied 1092 patients with different muscle disorders and performed (i) test-retest reliability (n = 80); (ii) psychometric (n = 345), known-group (n = 1092), external criterion (n = 70), and concurrent validity with SF-36 (n = 183).
Results:
We have translated and formally validated the Italian version of INQoL confirming and extending results obtained in the United Kingdom. In addition to good results in terms of reliability, known-group and criterion validity, a comparison with the SF-36 scales showed a stronger association between INQoL total index and SF-36 physical (r = -0.72) than mental (r = -0.38) summary health indexes. When considering comparable domains of INQoL and SF-36 with respect to an objective measure of muscle strength assessment (MMRC), regression analysis showed a stronger correlation using INQoL rather than SF-36 scores.
Conclusions:
INQoL is recommended to assess QoL in muscle diseases because of its ability to capture physical limitations that are specifically relevant to the muscle condition.

• 出版日期2010-9