What Are the Significant Factors Affecting Pain in Patients With Hartofilakidis Type I Developmental Dysplasia of the Hip?

Abstract

Objective To explore the influencing factors of pain onset age and severe pain in patients with Hartofilakidis type I developmental dysplasia of the hip (DDH). Methods A retrospective study of 83 patients with DDH treated at our hospital from January 2017 to June 2021 was conducted. The pain onset age, patients’ demographic data, and radiographic parameters were collected. Multiple linear regression was used to determine the influencing factors of pain onset age. Cox regression analysis was used to determine the influencing factors of severe pain attacks. Results According to the results of multiple linear regression analysis, when the distance between the medial femoral head and the ilioischial line increased by one unit, the pain onset age decreased by 1.7 years (β = − 1.738, 95% CI: − 1.914–[–1.561], p < 0.001). When the sharp angle increases by one unit, the pain onset age decreases by 0.3 years (β = − 0.334, 95% CI: − 0.496–[–0.171], p < 0.001). According to the results of the Cox regression analysis, for every unit increase of the lateral centre-edge angle (LCEA), the probability of severe pain decreased to 95% of the original (Exp [β]: = 1.090, 95% CI: 0.898–0.999, p = 0.04). For every unit increase in the distance between the medial femoral head and the ilioischial line, the likelihood of severe pain is 2.4 times higher than that of the original (Exp [β]: 2.417, 95% CI: 1.653–3.533, p < 0.001). Conclusion Larger distances between the medial femoral head and the ilioischial line and sharp angle can lead to an earlier pain onset age in patients with DDH. Small LCEA and excessive distance between the medial femoral head and the ilioischial line are risk factors for severe pain.