title: The increase in body temperature of elderly patients in the first twenty-four hours following admission to hospital.
abstract: In 76 unselected patients aged 70 years or over, the mean increase in rectal temperature in the 24 hours following admission to hospital was 0.4 degrees C. In those who did not receive antibiotics on admission, the mean increase in rectal temperature was 0.6 degrees C, with increases of up to 2.3 degrees C recorded. There were no significant changes in C-reactive protein, white cell count or erythrocyte sedimentation rate over that period, suggesting that the changes were due to passive warming rather than to progression of the underlying disease. Infected patients may have low or normal body temperatures on admission. Within 24 hours, nearly all infected patients (excluding a few with low or normal temperatures on admission, who receive antibiotics) have a raised body temperature. The most sensitive test for a raised body temperature is the rectal temperature measured at least 24 hours after admission. A patient who has a low or normal body temperature on admission has a 61% chance of having a raised body temperature the next day. At least 55% of patients admitted with a febrile illness have low or normal body temperatures on admission.
authors.affiliation: Department of Medicine for the Elderly, Edgware General Hospital, Middlesex.
authors.forename: A
authors.initials: A
authors.lastname: Darowski
authors.forename: Z
authors.initials: Z
authors.lastname: Najim
authors.forename: J R
authors.initials: JR
authors.lastname: Weinberg
authors.forename: A
authors.initials: A
authors.lastname: Guz
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001424:Bacterial Infections / Q000503:physiopathology / Q000517:prevention & control; D001831:Body Temperature / Q000502:physiology*; D006760:Hospitalization; D006801:Humans; D010343:Patient Admission; D011292:Premedication; D013997:Time Factors
chemical_list: D000900:Anti-Bacterial Agents