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Letters
May 22/29, 2002

Does Marijuana Use Cause Long-term Cognitive Deficits?

Author Affiliations
 

Stephen J.LurieMD, PhD, Senior EditorIndividualAuthor

JAMA. 2002;287(20):2652-2654. doi:10.1001/jama.287.20.2652

To the Editor: I would like to point out 2 defects in the study of Dr Solowij et al. First, it does not control for age-related differences in cognitive function, which could potentially cause the differences between the long- and shorter-term user groups. Second, cannabinoids are present for many days after ingestion. Age-related differences in excretion may also explain the apparent difference in function between long- and shorter-term users of marijuana.

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