Radiographic Investigation of Angular and Linear Measurements Including First Metatarsophalangeal Joint Dorsiflexion and Rearfoot to Forefoot Axis Angle

M.J. Taranto, J. Taranto, Alan Bryant, Kevin Singer

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18 Citations (Scopus)

Abstract

This study investigated intra- and inter-rater reliability of several radiographic angular and linear parameters using 6 subjects. Using standard weight-bearing radiographs, the following measurements were performed: first metatarsal protrusion distance, hallux abductus, first intermetatarsal, calcaneal inclination and lateral intermetatarsal angles. Measurement of lateral stressed dorsiflexion of the first metatarsophalangeal joint and the rearfoot-to-forefoot-axis angle taken using a composite view were also obtained. All parameters were measured independently by 2 raters, and measurements were repeated on 3 separate occasions at weekly intervals. Intrarater reliability of radiographic measurements ranged between R= 0.65–1.00 for lateral stressed dorsiflexion, and between R = 0.91 and 0.99 for the rearfoot to forefoot axis angle. Inter-rater reliability of radiographic measurements ranged from R= 0.82–0.99. Specifically, lateral stressed dorsiflexion showed R = 0.87 with a mean difference of −1.47 (confidence interval [CI]: −3.42, 0.47), indicating no significant difference (t = 1.54, P = 0.13). The rearfoot-to-forefoot-axis angle showed R = 0.92 with a mean difference of −0.15 (CI: −1.05, 0.74), indicating no significant difference (t = 0.35, P = 0.73). The 7 angular and linear measurements chosen demonstrated high inter- and intrarater reliability. These results indicate that weight-bearing radiographic first metatarsophalangeal joint dorsiflexion using the lateral stressed dorsiflexion view, and measurement of the rearfoot-to-forefoot-axis angle using a composite view could be measured reliably within and between raters.
Original languageEnglish
Pages (from-to)190-199
JournalJournal of Foot and Ankle Surgery
Volume44
Issue number3
DOIs
Publication statusPublished - 2005

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