We assessed the effect of referral bias on patients with ALS treated at our medical center. A total of 132 subjects were treated by our center over the past 3 years. The referral population had a median survival of 29 months compared to 18 months for the local population (p = 0.007). Referral bias should be addressed when assessing the efficacy of self-selected therapies in the setting of a tertiary ALS clinic. ©2007AAN Enterprises, Inc.
CITATION STYLE
Sorenson, E. J., Mandrekar, J., Crum, B., & Stevens, J. C. (2007). Effect of referral bias on assessing survival in ALS. Neurology, 68(8), 600–602. https://doi.org/10.1212/01.wnl.0000254501.58158.e7
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