True or False: Less than 5% of LBP is due to serious pathology?

• A. False
• B. About 20%
• C. About 50%
• D. True

Answer: (D)

Most low back pain is non-specific mechanical pain and not due to a serious underlying disease. Because the vast majority of cases are benign, the portion caused by serious pathology is very small—generally cited as under 5%. This is why clinicians focus on red flags to catch the rare cases requiring urgent evaluation, while most patients are managed with conservative care and gradual return to activity. Red flags to watch for include weight loss, fever, history of cancer, night pain, persistent severe or progressive neurologic deficits, saddle anesthesia, bowel or bladder dysfunction, severe trauma, or immunosuppression; their presence prompts further imaging or urgent referral. In short, the statement is true because serious pathology in low back pain is uncommon.