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Shoe-stiffening inserts for first metatarsophalangeal joint osteoarthritis: a randomised trial.

Munteanu, S.E.; Landorf, K.B.; McClelland, J.A.; Roddy, E.; Cicuttini, F.M.; Shiell, A.; Auhl, M.; Allan, J.J.; Buldt, A.K.; Menz, H.B.

Authors

S.E. Munteanu

K.B. Landorf

J.A. McClelland

F.M. Cicuttini

A. Shiell

M. Auhl

J.J. Allan

A.K. Buldt

H.B. Menz



Abstract

OBJECTIVE: To evaluate the efficacy of carbon-fibre shoe-stiffening inserts in individuals with first metatarsophalangeal joint osteoarthritis.

DESIGN: This was a randomised, sham-controlled, participant- and assessor-blinded trial. One hundred participants with first metatarsophalangeal joint osteoarthritis received rehabilitation therapy and were randomised to receive either carbon fibre shoe-stiffening inserts (n = 49) or sham inserts (n = 51). The primary outcome measure was the Foot Health Status Questionnaire (FHSQ) pain domain assessed at 12 weeks.

RESULTS: All 100 randomised participants (mean age 57.5 (SD 10.3) years; 55 (55%) women) were included in the analysis of the primary outcome. At the 12 week primary endpoint, there were 13 drop-outs (7 in the sham insert group and 6 in the shoe-stiffening insert group), giving completion rates of 86 and 88%, respectively. Both groups demonstrated improvements in the FHSQ pain domain score at each follow-up period, and there was a significant between-group difference in favour of the shoe-stiffening insert group (adjusted mean difference of 6.66 points, 95% CI 0.65 to 12.67, P = 0.030). There were no between-group differences for the secondary outcomes, although global improvement was more common in the shoe-stiffening insert group compared to the sham insert group (61 vs 34%, RR 1.73, 95% CI 1.05 to 2.88, P = 0.033; number needed to treat 4, 95% CI 2 to 16).

CONCLUSION: Carbon-fibre shoe-stiffening inserts were more effective at reducing foot pain than sham inserts at 12 weeks. These results support the use of shoe-stiffening inserts for the management of this condition, although due to the uncertainty around the effect on the primary outcome, some individuals may not experience a clinically worthwhile improvement.

Acceptance Date Feb 1, 2021
Publication Date Feb 11, 2021
Journal Osteoarthritis and Cartilage
Print ISSN 1063-4584
Publisher Elsevier
Pages 480-490
DOI https://doi.org/10.1016/j.joca.2021.02.002
Keywords Foot; Osteoarthritis; Orthosis; Randomised trial
Publisher URL https://www.oarsijournal.com/article/S1063-4584(21)00037-6/fulltext

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