This study compared the severity of illness and outcomes of surgical intens
ive care unit (SICU) patients age 100 years or older with those of younger
SICU patients. Severity of illness was measured with the Simplified Acute P
hysiology Score (SAPS) and the Quantified Therapeutic Intervention Scoring
System (QTISS). Outcomes were evaluated with SICU length of stay (LOS), hos
pital LOS, SICU mortality, and hospital mortality. All patients admitted to
an urban, tertiary-care SICU from August 1, 1986 to July 31, 1998 (12 year
s) were included. A total of 24,395 consecutive patients were evaluated of
whom nine (0.037%) were age 100 or more. Complete outcome data were availab
le for 13,773 patients who were divided into five groups on the basis of ag
e: <70, 70 to 79, 80 to 89, 90 to 99, and 100 years and above. Nine centena
rians were admitted to the SICU of whom one died in the SICU and another di
ed in the hospital after SICU discharge (22.2% overall mortality). Centenar
ian patients had higher SAPS and QTISS on admission than patients in all ot
her groups, although this difference was not significant because of the sma
ll number of centenarians. SICU and hospital LOS were not significantly lon
ger for centenarians. Mortality in the SICU and hospital was significantly
different across the age groups and rose with age. However, the modest 11.1
per cent SICU mortality rate in centenarians along with their LOS statisti
cs indicate that these patients fare relatively well in surgical intensive
care.