Relationship between functional loss before hospital admission and mortality in elderly persons with medical illness.

OBJECTIVE: This hospital-based prospective study tests the hypothesis that, in a large group of hospitalized elderly patients, those who report functional decline between pre-illness baseline and hospital admission have a higher risk of death. METHODS: Nine hundred fifty elderly ambulant patients (F = 69.3%; mean age 78.3 +/- 8.5 years) were consecutively admitted to a geriatric ward (Poliambulanza Hospital, Brescia, Italy) during a 15-month period. Number and severity of somatic diseases, Charlson Index score, APACHE II score, level of serum albumin, cognitive status (by Mini-Mental State Examination), and depression score (by Geriatric Depression Scale), were assessed on admission and evaluated as potential prognostic factors. Functional status (by Barthel Index) was assessed by self-report on admission. Preadmission function was also assessed by self-report at the time of admission. Impairment of function due to an acute event is measured as the difference between performances on admission and 2 weeks before the acute event. Six-month survival was the main outcome variable. RESULTS: Factors related to mortality in bivariate analysis were: male sex, age over 80, cancer, congestive heart failure, pulmonary diseases, elevated Charlson Index score, and (independently) dementia (Mini-Mental State Examination < 18), APACHE-Acute Physiology Score , albumin level <3.5 g/dL, and anemia. After controlling for these variables and for Barthel Index score 2 weeks before the acute event, change in function due to the acute disease is independently related to 6-month mortality (minor functional change [<30 Barthel Index Point] relative risk: 1.3, 95% confidence interval, 0.6-3.0 and major functional change [major functional decrement] relative risk: 2.8, 95% confidence interval, 1.3-5.7). CONCLUSIONS: Disease-induced disability may reflect a condition of biological inability to react to acute diseases (i.e., frailty), and should be assessed as a relevant prognostic indicator.

Functional trajectories during hospitalization: a prognostic sign for elderly patients.

BACKGROUND: Clinicians have used measurements of pathological conditions and functional status to capture the heterogeneity of older individuals for prognostic purposes. However, the literature pays low attention to physical functional changes. METHODS: A retrospective cohort study to investigate the association between functional changes during hospitalization and 3-month mortality. A total of 1,119 acutely ill elderly patients admitted to four beds arranged like a high-dependency area in a geriatric unit (mean age 80.6 +/- 7.8 years) were subdivided into four groups according to degree of functional decline at admission in comparison with the premorbid level and ability or inability to regain function at discharge: with moderate loss, able to regain (group a) and unable to regain function (group b); and with severe loss, able to regain (group c) and unable to regain function (group d) during hospitalization. Age, gender, cognitive and functional status (basic activities of daily living -[BADL]), serum albumin, Acute Physiology Score, Acute Physiology and Chronic Health Evaluation II score, comorbid conditions, number of drugs, and length of stay were collected. RESULTS: Total 3-month mortality was 17.9%. Mortality rate was 10.7%, 17.6%, 14.5%, and 36.7% in groups a, b, c, and d, respectively. In three different multivariate Cox models including BADLs before admission, at admission, and at discharge, inability to regain function during hospitalization was an independent factor associated with 3-month mortality. CONCLUSIONS: In acutely ill elderly patients, lack of function regain during hospitalization is associated with higher mortality rate at 3 months, compared with those capable to regain the baseline functional status.

Geriatric Index of Comorbidity: validation and comparison with other measures of comorbidity.

BACKGROUND: the debate about measures of chronic comorbidity in the elderly is mainly due to the lack of consensus on pathogenetic models. OBJECTIVE: the aim of the present study was to compare the concurrent validity of a number of measures of chronic comorbidity assuming different pathogenic models, versus disability in elderly patients. SETTING: the Geriatric Evaluation and Rehabilitation Unit for subacute and disabled patients. PARTICIPANTS: 493 new and consecutive elderly patients (mean age 79 years, 71% females) admitted to the Geriatric Evaluation and Rehabilitation Unit. MEASUREMENTS: we evaluated age, gender, cognitive status, depressive symptoms, functional status, somatic health, and nutritional status on admission. Functional status was assessed by the self- or proxy reported Katz's BADL scale and by the performance-based Reuben's Physical Performance Test. Somatic health was assessed as presence and severity of diseases according to standardized criteria. Comorbidity was measured as number of diseases, sum of disease severity, and with a composite score (Geriatric Index of Comorbidity) which takes into account both number of diseases and occurrence of very severe diseases. Mortality was assessed after 12 months. RESULTS: specific diseases and their severity were found to be associated with disability measures. All measures of comorbidity were significantly correlated with disability, but only the Geriatric Index of Comorbidity was independently associated after adjustment for severity of individual diseases. In addition, increasing severity of comorbidity as defined by Geriatric Index of Comorbidity was associated with greater disability while this was not true for the other comorbidity measures (F statistics for the regression model including the Geriatric Index of Comorbidity=19.9). The Geriatric Index of Comorbidity, but not the other comorbidity measures, predicted mortality (relative risk of death 2.3, 95% confidence interval 1.7-3.1). CONCLUSION: the Geriatric Index of Comorbidity, a measure of comorbidity assuming that both number of diseases and occurrence of very severe diseases are determinants of health, has the greatest concurrent validity with disability and is the best predictor of mortality.