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[Definition of "salt sensitivity"]

C Ummenhofer1, R Kluthe

  • 1Deutsche Akademie für Ernährungsmedizin, Freiburg.

Deutsche Medizinische Wochenschrift (1946)
|January 21, 1994
PubMed
Summary
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The definition of salt sensitivity lacks consistency across studies. Current evidence is insufficient to differentiate between salt-sensitive and salt-insensitive individuals, suggesting hypertensives should not avoid reducing salt intake.

Area of Science:

  • Cardiovascular Research
  • Clinical Nutrition
  • Hypertension Studies

Context:

  • The definition and measurement of salt sensitivity have varied significantly in clinical research.
  • Previous studies (1978-1992) employed diverse methodologies to assess salt sensitivity in both normotensive and hypertensive individuals.

Purpose:

  • To critically analyze the various definitions and experimental approaches used to define "salt sensitivity" in published clinical studies.
  • To evaluate the evidence base for distinguishing between salt-sensitive and salt-insensitive subjects.

Summary:

  • A review of 32 studies published between 1978 and 1992 revealed inconsistent experimental designs for determining salt sensitivity.
  • Three main study types were identified based on sodium intake manipulation: low-to-high, high-to-low, and randomized sequences.

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  • The analysis concluded that current evidence is insufficient to reliably differentiate salt-sensitive from salt-insensitive individuals.

    • Impact:

    • Challenges the established concept of distinct salt sensitivity categories in hypertension research.
    • Suggests that individuals with hypertension should not be discouraged from reducing their sodium chloride intake based on current evidence.
    • Highlights the need for standardized methodologies in future salt sensitivity research.