A woman’s body temperature is taken routinely while she is in labor

The relationship between OT and IUT

A woman’s body temperature is taken routinely while she is in labor, and is an important component in diagnosing chorioamnionitis and other febrile diseases.

Oral temperature (OT) is by far the most common method for measuring body temperature.

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Commonly, the laboring patient is allowed oral intake of fluid or ice chips, which may affect OT readings.

Furthermore, OT may be influenced by the propensity for breathing through the mouth while the woman is in labor.

Hence, a study was designed to measure the intrauterine temperature (IUT) through an intrauterine pressure-temperature catheter and to determine the relationship between OT and IUT.

Both temperatures were simultaneously obtained immediately after insertion of the intrauterine pressure-temperature catheter and hourly until delivery of the newborn.

All patients were asked to give written informed consent, as approved by the hospital’s institutional review board.

The study results are presented in the following table: IUT Elevated body temperature No elevated body temperature > 38.0 oC 10 17 < 38.0 oC 0 70 > 38.1 oC 9 14 < 38.1 oC 1 73 > 38.2 oC 8 13 < 38.2 oC 2 74 > 38.3 oC 8 8 < 38.3 oC 2 79 > 38.4 oC 8 5 < 38.4 oC 2 82 > 38.5 oC 7 5 < 38.5 oC 3 82 > 38.6 oC 6 4 < 38.6 oC 4 83 > 38.7 oC 6 3 < 38.7 oC 4 84 > 38.8 oC 5 2 < 38.8 oC 5 85 > 38.9 oC 5 1 < 38.9 oC 5 86 > 39.0 oC 5 1 < 39.0 oC 5 86 > 39.1 oC 5 0 < 39.1 oC 5 87

a. What measures of reliability or validity should be computed to determine how well the intrauterine pressure-temperature catheter detects elevated body temperatures among women during labor, if elevated body temperature is defined as greater than 38.0oC orally? Please justify your choice.

b. Determine the ideal intrauterine temperature cut-off for determining how valid this new diagnostic tool is in detecting elevated body temperature for women in labor. Justify your decision.

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