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Childhood fever: correlation of diagnosis with temperature response to acetaminophen
Insights
Fever response to acetaminophen in children does not significantly differ by diagnosis. This study found that while some differences exist, they are not clinically useful for identifying illness causes in young patients.
Area of Science:
- Pediatrics
- Pharmacology
Background:
- Febrile illnesses are common in children, prompting the use of antipyretics like acetaminophen.
- A common belief suggests that the fever response to antipyretics varies based on the underlying diagnosis in children.
Purpose of the Study:
- To prospectively evaluate if the temperature response to acetaminophen in febrile children differs significantly across various diagnoses.
- To determine the clinical utility of fever response to acetaminophen in differentiating causes of febrile illness in young children.
Main Methods:
- A prospective study involving 1,559 febrile children (8 weeks to 6 years) treated with acetaminophen (15 mg/kg).
- Temperature measurements were recorded at baseline, one hour, and two hours post-administration.
- Physicians were blinded to repeat temperature measurements to avoid influencing patient management.
Main Results:
- Children with culture-confirmed bacterial infections or pneumonia showed slightly larger temperature reductions at one and two hours compared to other diagnoses.
- These statistically significant differences in temperature decrease were not deemed clinically useful.
- The study observed no clinically significant variation in acetaminophen's fever-reducing effect based on diagnosis.
Conclusions:
- Acetaminophen's effectiveness in reducing fever in children is not a reliable clinical indicator for distinguishing between different febrile illnesses.
- The findings suggest that clinical judgment, rather than fever response to acetaminophen, should guide the diagnosis of febrile conditions in pediatric patients.
Abstract:
Many people believe that temperature response to antipyretics in febrile children varies according to diagnosis. To evaluate the validity of this premise, we prospectively studied the temperature response to acetaminophen of febrile children who came to an urban pediatric emergency and walk-in facility. The study group consisted of 1,559 patients between the ages of 8 weeks and 6 years whose temperatures when seen were greater than 38.4 degrees C and who had not received antipyretic treatment within the previous four hours. Acetaminophen (15 mg/kg) was administered to each child and repeat temperatures were taken one and two hours later. Patient management was unaffected by the study, and physicians were unaware of the repeat temperature measurements. Telephone follow-up was conducted with the parents of each child within five days of the initial visit. Children with cultures positive for bacterial disease or chest x-ray films positive for pneumonia had slightly greater one- and two-hour temperature decreases compared with children with other diagnoses. Although statistically significant, we do not consider these differences in response to be clinically useful. We conclude that fever response to acetaminophen is not a clinically useful indicator by which to differentiate the causes of febrile illnesses in young children.