Abstract
Purpose: This population-based cross-sectional study examined the prevalence of high-intensity zones (HIZ) in the lumbar spine and their relationship to age, gender, disc degeneration, disc displacement (bulging or herniation), and facet joint degeneration.
 Materials and Methods: A retrospective analysis was conducted on MRI studies of 800 patients (4000 discs) who were admitted to the hospital with subacute-chronic low back pain (LBP) and presented with axial pain (musculogenic-discogenic-mechanic) at outpatient clinics. The frequency of speed was determined by considering a total of seven age categories in decades. Correlation analyses were performed between HIZ and other variables.
 Results: The prevalence of HIZ was 30%, highest in the >70 years age group and lowest in the
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