女性外翻引发籽骨嵴磨损的影响因素分析

Risk factors affected the intersesamoidal crista erosion in female patients with hallux valgus

Objective To explore the risk factors influencing the intersesamoidal crista erosion infemale patients with hallux valgus.Methods Symptomatic female hallux valgus patients who underwent a weightbearing CT scan were reviewed from October 2017 to June 2018. A total of 144 patients (237 feet) aged 19-84 years (53.79±13.04) were included in the study. Two groups were identified by whether or not the inersesamoidal crista eroded. Parameters about hallux valgus included age, inter-metatarsal angle (IMA), hallux valgus angle (HVA), distal metatarsal articular angle (DMAA), tibial sesamoid grading on dorsoplantar view, coronal plane sesamoid grading, first metatarsal rotation angle (α angle), and first metatarsal bottom rotation angle (β angle). The two groups of data were compared by Student's t-test, Wilcoxon rank test, or chi-square test according to data type and distribution. Parameters that had significant differences were included in the logistic regression by the forward model, and risk factors of intersesamoidal crista erosion were calculated. Receiver operating characteristic (ROC) analysis was then used to determine the cut-off values.Results The 144 (237 feet) patients showed an IMA of 13.85°±3.15°, an HVA 31.52°±11.23°, a DMAA of 18.10°±8.08°, an α angle of 22.78°±6.89°, and a β angle of 15.01°±6.45°. Only the β angle had no statistical difference (Z=-1.171, P>0.05), and all other parameters were statistically significant (all P values<0.05). Logistic regression results showed that age (OR(95% CI): 1.05(1.02-1.09), P＜0.01)] and coronal plane sesamoid grading (OR(95% CI): 4.41(2.90-6.70), P<0.01)] were the risk factors for intersesamoidal crista erosion. ROC calculation showed that the cut-off value of age was 53.5 years old (sensitivity 85.1%, specificity 56.6%), and that of coronal plane sesamoid grading was 1.5 (sensitivity 90.4%, specificity 67.8%).Conclusions The intersesamoidal crista erosion in female patients with hallux valgus is affected by age and coronal plane sesamoid grading but not by IMA, HVA, DMAA, sesamoid grading on the dorsoplantar plane and first metatarsal rotation angle.