Network Analysis of Contemporaneous Symptoms and Identification of Core Symptoms in Patients with Lumbar Disc Herniation.

Objective: To construct a contemporaneous symptom co-occurrence network of patients with lumbar disc herniation (LDH) to extract symptom clusters and identify core and bridge symptoms using network analysis. Methods: A questionnaire was administered to 312 LDH patients hospitalized in a tertiary-level hospital in Hubei Province from September 21, 2024, to March 31, 2025, using convenience sampling. Instruments included a general information questionnaire, the Japanese Orthopaedic Association's Low Back Pain Assessment Scale (JOA), the Visual Analogue Scale (VAS), and the Self-Rating Anxiety Scale (SAS). Symptomatic data were collected and downscaled using exploratory factor analysis to reduce dimensionality and extract symptom clusters with intrinsic associations. The symptom network was constructed using R, relationships between symptoms were analyzed, and centrality indices were calculated to identify key symptom nodes. Results: Exploratory factor analysis extracted four symptom clusters. They were the symptom cluster of limited lumbar mobility function, the symptom cluster of limited lower extremity mobility function, the symptom cluster of abnormal distal limb sensation, and the symptom cluster of lower extremity motor coordination disorder. The top three symptoms for node strength were Difficulty standing (rs = 5.72), Difficulty walking (rs = 5.43), and Difficulty turning over (rs = 5.35); the top three for bridge strength were Difficulty standing (rs = 4.58), walking ability (rs = 4.49), and Difficulty walking (rs = 4.37). Conclusion: Difficulty standing, Difficulty walking, and Difficulty turning are the most central symptoms in LDH patients, while Difficulty standing, walking ability, and Difficulty walking are bridge symptoms.