BMJ No 7106 Volume 315 Letters Saturday 23 August 1997
Intersalt data
We received many letters commenting on the cluster of papers on salt that we published in May last year. We had several problems with the letters but have now resolved these and are publishing the letters now.
Cross cultural studies such as Intersalt study cannot be used to infer causality
J Le Fanu;
Data linking sodium intake to subsequent morbid and fatal outcomes must be studied
M Alderman;
Conclusions drawn in paper "revisiting" Intersalt data are of questionable validity
A Macnair;
Epidemiological studies should be designed to reduce correction needed for measurement error to a minimum
N E
Day;
Correction for regression dilution bias in Intersalt study was misleading
G D Smith and A N Phillips;
Slow decremental change in dietary sodium load in whole populations is needed
G Watt and
J T Hart;
Science demands data sharing
K Rennolls;
Reply to Rennolls's letter (exclusive to BMJ Internet version)
P Elliott
Reply for Intersalt Steering and Editorial Committee (extended from BMJ paper version
P Elliott and others;
Collaborative efforts must be made to reduce sodium in diet
R
H Grimm;
Sodium contents of restaurant foods in United States are high
B F Liebman and M F Jacobson;
Salt Institute has continued to distort evidence (exclusive to BMJ Internet version)
G Macgregor
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