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Fifty-three consecutive patients with suspected multiple sclerosis were studied to determine if the extent of disease apparent on MRI correlated with the clinical severity of the disease. MRI images were evaluated and compared with an assessment of the patient's disability using three neurologic rating scales. The severity of the disease seen on MRI showed a strong statistically significant correlation (p = 0.0001) with two of the three methods of clinical evaluation and a significant correlation (p less than 0.01) with the third rating scale. The severity of disease shown on MRI correlated only weakly (p = 0.05) with the length of time the patients had been symptomatic. Normal controls did not show any abnormality characteristic of multiple sclerosis on MRI or on neurologic exam.
Edwards et al. (Mon,) studied this question.