Comparison of Oral and Rectal Temperatures During Work in Heat

Abstract
Parallel determinations of rectal and oral temperatures were made on 229 laborers after they worked for 2-3 hours in hot and humid underground environments. The mean difference of 1.22[degree]F corresponds with those differences previously reported for men in resting and basal conditions. The relationship between the 2 scores is rectilinear, but with a large spread in the differences. An oral temperature of 101[degree]F was found to be the equivalent of 103[degree]F rectal temperature as a limit for safe exposures to heat.

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