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Correction to Levine et al., N Engl J Med 341(27):2100 December 30, 1999.

Correspondence
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Volume 342:1531-1532 May 18, 2000 Number 20
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More on Chewing Gum

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by Levine, J.
To the Editor: In their analysis of the energy expended in chewing gum (Dec. 30 issue),1 Levine et al. instructed subjects to chew gum "at a frequency of precisely 100 Hz (a value that approximates chewing frequency at our institution) with the aid of a metronome." I am curious about the use of hertz, the Système International unit of frequency measured in cycles per second.2,3 As defined, a value of 1.0 Hz rather than 100 Hz would be more plausible. Alternatively, if the experimental protocol had called for a setting of 100 on a standard metronome, as might be inferred . . . [Full Text of this Article]

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Related Letters:

The Energy Expended in Chewing Gum
Levine J., Baukol P., Pavlidis I.
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N Engl J Med 1999; 341:2100, Dec 30, 1999. Correspondence


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