Reliability and Validity of the Turkish Version of the American Orthopaedic Foot and Ankle Society Hallux Metatarsophalangeal-Interphalangeal Joint Scale

Abstract

Background

The American Orthopaedic Foot and Ankle Society Hallux Metatarsophalangeal-Interphalangeal (AOFAS Hallux MTP-IP) scale is one of the most widely used outcome measures to evaluate hallux pathologies. This study aimed to translate the AOFAS Hallux MTP-IP scale into Turkish and investigate its psychometric properties.

Methods

The psychometric properties of the Turkish version of the AOFAS Hallux MTP-IP (AOFAS Hallux MTP-IP-T) scale were tested in 66 patients with hallux pathologies (52 women; mean age, 47.64 ± 12.75 years). Cronbach’s alpha was used to assess internal consistency. The intraclass correlation coefficient (ICC) was used to estimate test-retest. Construct validity was analyzed with the Turkish version of the Manchester-Oxford Foot Questionnaire (MOXFQ), Visual Analogue Scale (VAS), and 12-item Short-Form Health Survey(SF-12).

Results

The AOFAS Hallux MTP-IP-T scale had adequate internal consistency (α = 0.71) and test-retest reliability (ICC_2,1 = 0.93 for pain, ICC_2,1 = 0.97 for function, and ICC_2,1 = 0.97 for total score). The AOFAS Hallux MTP-IP-T total score has a moderate to strong correlation with VAS-activity and MOXFQ (ρ = −0.77, P = .001; ρ = −0.69, P = .001, respectively). The weakest correlation was found between the AOFAS Hallux MTP-IP-T and the SF-12 mental component scale (ρ = 0.31, P = .01).

Conclusion

AOFAS Hallux MTP-IP-T has sufficient reliability and validity to evaluate Turkish-speaking individuals with a variety of forefoot pathologies including the hallux.

Levels of Evidence:

Level II