AGE CHANGES AND SEX DIFFERENCES IN ALVEOLAR CO2 TENSION

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Abstract
The alveolar CO2 tension of adult [male][male] is significantly higher than that of adult [female][female]. This sex difference first becomes statistically significant at the age of 13 yrs. This difference in alveolar C02 tension of [male][male] and [female][female] disappears (in adults) if the alveolar CO2 tension for each subject is divided by height or surface area. Within a given sex, no significant correlation between body size and alveolar CO tension was found. Possible explanation for the sex difference must lie in physiological characteristics not present before the age of 13 yrs.

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