Little is known about the reliability of G8 screening tool and the prognostic value of clinical parameters within the Comprehensive Geriatric Assessment (CGA) in clinically fit older patients with haematological malignancies. This study was performed to assess the reliability of G8 as a screening tool and to determine the predictive value of CGA items in terms of one-year overall survival (OS). G8 and CGA were proposed to 107 consecutive patients (65-89yrs) with haematological malignancies that were judged clinically fit to receive chemotherapy. Ninety patients were evaluable with both scales; 72% and 80% were defined as "vulnerable" when evaluated with G8 (≤14.5) or CGA (≥2 impairments) respectively. The area under ROC-curve of G8 compared to CGA was 0.749 ± 0.051. Neither G8 nor CGA total score were predictive of one-year OS. However, age (HR=1.09, 95%CI: 1.009-1.185; p=0.029), diagnosis (HR=5.99, 95%CI: 2.322-15.428; p<0.001) and cognitive status (HR=3.50, 95%CI: 1.132-10.849; p=0.030) were predictive of OS. We conclude that in our selected haematological patients 1) the G8 score does not help selecting patients for CGA 2) the G8 and CGA total score do not predict OS 3) in addition to the age and disease itself, cognitive impairment appears to be a powerful prognostic factor.
IntroductionDementia is a known predictor of shorter survival times in older cancer patients. However, no empirical evidence is available to determine how much a cognitive impairment shortens survival in older patients when cancer treatment is initiated.PurposeTo longitudinally investigate how much a cognitive impairment detected at the initiation of cancer treatment influences survival of older patients during a two-year follow-up duration and to compare the predictive value of a cognitive impairment on patients survival with the predictive value of other vulnerabilities associated with older age.MethodsThree hundred and fifty-seven consecutive patients (≥65 years old) admitted for breast, prostate, or colorectal cancer surgeries were prospectively recruited. A cognitive impairment was assessed with the Montreal Cognitive Assessment (MoCA<26). Socio-demographic, disease-related, and geriatric vulnerabilities were assessed using validated tools. Univariate and subsequent multivariate Cox proportional hazards models stratified for diagnosis (breast/prostate cancer versus colorectal cancer) and disease status (metastatic versus non-metastatic) were used.ResultsA cognitive impairment was detected in 46% (n = 163) of patients. Survival was significantly influenced by a cognitive impairment (HR = 6.13; 95% confidence interval [CI] = 2.07–18.09; p = 0.001), a loss in instrumental autonomy (IADL ≤7) (HR = 3.06; 95% CI = 1.31–7.11; p = 0.009) and fatigue (Mob-T<5) (HR = 5.98; 95% CI = 2.47–14.44; p <0.001).ConclusionsDuring the two years following cancer treatment initiation, older patients with a cognitive impairment were up to six times more likely to die than patients without. Older patients should be screened for cognitive impairments at cancer treatment initiation to enable interventions to reduce morbidity and mortality. Further studies should address processes underlying the relationship between cognitive impairments and an increased risk of dying in older cancer patients.
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