Objective Hospitalisation in intensive care unit (ICU) may cause changes in oral environment, which may influence patients’ health status. The aim of this study was to evaluate the frequency of intraoral and extraoral findings observed during ICU admission, and to verify if there is an association with clinical prognosis scores.

Methods Data regarding clinical characteristics of patients hospitalised in an ICU were collected from medical records. The prognostic scores Sepsis Related Organ Failure Assessment (SOFA) and Simplified Acute Physiology Score (SAPS 3) were estimated with data collected from admission and SOFA on the day of the oral examination as well. Data on oral mucosa lesions, saliva, dental condition and oral hygiene were evaluated during oral examinations.

Results The association of oral findings with prognostic scores was statistically verified. The majority (92.2%) of the 170 evaluated patients showed extraoral or intraoral findings during ICU admission. The most frequent findings were chapped and crusted lips, coated tongue, pale mucosa, haemorrhagic lesions, candidiasis, depapillated tongue and traumatic lesions. There were significant higher prognostic scores in the presence of the following extraoral and intraoral findings: crusted and ulcerated lips, haemorrhagic lesions, jaundice, spontaneous oral bleeding, coated and depapillated tongue. Median SAPS 3 was higher in patients with poor oral hygiene.

Conclusions Oral findings were frequent in the population of patients hospitalised in the ICU and some of them were associated with worse prognostic scores. Routine oral examinations must be performed in hospitalised patients from ICUs for detection of oral markers of worse clinical prognosis.