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Table 2 Categories of severity of multifidus fatty atrophy in the total study population

From: Correlation between multifidus fatty atrophy and lumbar disc degeneration in low back pain

Atrophy grade L4/L5 L5/S1 Total Multifidus %
Normal (0–10%) 5 2 7 10
Mild (10–30%) 21 22 43 61.4
Moderate (30–50%) 8 10 18 25.7
Severe (> 50%) 1 1 2 2.9