Order of resolution and recurrence of inflammatory symptoms in lipedema: a longitudinal study of 1,300 patients

BACKGROUND: The Questionário de avaliação sintomática do lipedema (QuASiL - Lipedema Symptom Assessment Questionnaire) assesses 13 distinct inflammatory symptoms of lipedema, but whether these symptoms resolve and recur simultaneously or follow a consistent order remains unknown. OBJECTIVES: To characterize the persistence hierarchy of the 13 QuASiL inflammatory symptoms in a retrospective lipedema cohort under heterogeneous conservative treatment, using 6 complementary rank-order analyses and testing the null hypothesis that symptoms resolve with equal magnitude. METHODS: This retrospective longitudinal study included 1,300 patients who were clinically diagnosed with lipedema by a vascular surgeon and who completed the QuASiL on at least 2 occasions (minimum 14-day interval; median follow-up 181 days, IQR 92-380, maximum 1,787 days). A consensus ranking was computed across all analyses. A sensitivity analysis was conducted using the conventional T 0 = first visit, T 1 = last visit convention, and a Kaplan-Meier survival analysis estimated the time (in absolute days) to ≥ 50% reduction from baseline per symptom. RESULTS: The symptoms did not resolve simultaneously (Friedman χ2 (12) = 168.08, p < 0.001). All 13 symptoms improved during follow-up, showing a consistent order across the 6 analyses. A slower-resolving core was identified: bruising (consensus rank 1.7), swelling (2.0), touch sensitivity (4.3), leg heaviness (4.7), and fatigue (4.7). A rapidly-responding group comprised skin irritation (66.4% proportional reduction), itching (62.0%), and walking difficulty (62.6%). Even the most resistant symptom (bruising) achieved a mean 39.1% proportional reduction, with half of patients reaching ≥ 50% improvement. During worsening, swelling and pressure/tension re-emerged first. The sensitivity analysis (T0 = first, T1 = last) produced an essentially identical ranking (Spearman ρ = 0.945, p < 10-5). The Kaplan-Meier analysis estimated a median of 546 days for bruising vs 207 days for itching to reach ≥ 50% reduction from baseline (log-rank χ2 = 44.6, p < 10-10); the fastest-resolving symptom was heat/burning at 203 days. CONCLUSIONS: In this retrospective cohort of patients under heterogeneous conservative treatment, the 13 QuASiL inflammatory symptoms improved following a consistent order across 6 independent analyses, with bruising and swelling as the most persistent symptoms.