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Review Question - QID 5760

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QID 5760 (Type "5760" in App Search)
A 75-year-old left-hand dominant man with hypertension presents complaining of night-time hand pain and numbness in his left thumb and index finger. On exam, he has a positive Tinel's sign at the left wrist with no thenar muscle atrophy. Nerve conduction velocities show motor and sensory latencies of 5 ms with sharp waves and fibrillations on electromyography. Which of the following in this patient would be most predictive of poor resolution of all symptoms after a carpal tunnel release?