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Comment & Response
June 2016

Hypertension, the Swedish Patient Register, and Selection Bias

Author Affiliations
  • 1Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
JAMA Intern Med. 2016;176(6):862-863. doi:10.1001/jamainternmed.2016.1556

To the Editor It is with interest that I read the article by Crump et al1 in a recent issue of JAMA Internal Medicine concerning physical fitness and body mass index (BMI) at military conscription and its association with future hypertension.1 However, I do have some concerns about the use of a hypertension diagnosis in the Swedish Patient Register as an outcome.

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