BACKGROUND: This study examined whether @entity2332 (< 36.0  C) incidence among @entity3124 @entity1 varied over time, the determinants of change, and the associated risk for ICU mortality. METHODS: Interrupted time series analysis among adults admitted to ICUs in Calgary, Canada over 8.5 years. Changes in the incidence of @entity2332 within the first 24 hours of ICU admission were modelled using segmented regression. RESULTS: Among 15,291 first admissions to ICU, @entity2332 incidence decreased from 29% to 21% during the study period. Implementation of a new temporal artery thermometer (TAT) was associated with the majority of the decrease in incidence (10%; 95% CI 7.1-13%; P < .0001). However, subgroup analysis revealed important differences between medical and surgical @entity1 . @entity2332 incidence decreased among surgical @entity1 before TAT implementation (0.4% per quarter, 95% CI 0.1-0.7%, P = .009), but not after, whereas in medical @entity1 , the incidence increased after (1.0% per quarter, 95% CI 0.6-1.4%, P < .0001) but not before TAT implementation. Segmented logistic regression suggested that increases in the proportion of @entity1 with non-traumatic neurologic admission diagnoses were associated with @entity2332 incidence among medical @entity1 , whereas there was no measurable clinical factor associated with the observed time trends among surgical @entity1 . @entity2332 at ICU admission was independently associated with ICU mortality in medical and surgical @entity1 throughout the entire study. CONCLUSION: The incidence of @entity2332 at ICU admission was dependent on medical versus surgical status, and the method of non-invasive temperature measurement, but was persistently associated with ICU mortality.

XXXX in Adult ICUs: Changing Incidence But Persistent Risk Factor for Mortality.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity3124 :: ('MESH:D016638', 'Disease') :: ['critically ill'] @entity2332 :: ('MESH:D007035', 'Disease') :: ['Hypothermia', 'hypothermia']
@entity2332 :: (MESH:D007035,Disease) :: ['Hypothermia']
