In:
Blood, American Society of Hematology, Vol. 106, No. 11 ( 2005-11-16), p. 1828-1828
Abstract:
Obesity predicted decreased EFS in pediatric ALL (ASH 2004, Abstract#992). Here we report the effect of obesity, defined as body mass index & gt;30, in 906 adults enrolled in two GIMEMA trials. The first study (1996–2001) included 45 obese (9.5%) and 426 non-obese patients. Obese patients were older, received lower total doses of vincristine (VCR) and daunomicin (DNR) and had more hepatic and pulmonary toxicity during induction than not-obese patients; the incidence of toxic deaths and complete remissions (CR) were similar. By multivariate analysis, obesity, high WBC, age & gt;30y and presence of BCR-ABL at diagnosis independently predicted EFS. Hazard ratios (HR) for any events were respectively 1.506 (1.059–2.142, p=0.0228), 1.002 (1.001–1.003, p=0.0022)), 1.015 (1.006–1.025, p=0.0014) and 1.8 (1.4–2.4, p & lt;0.0001). The effect of obesity on EFS was present across all levels of WBC, but was observed prevalently in BCR-ABL-negative patients. 3y-EFS in obese vs non-obese patients was 22.9% vs 39.5% (p=0.0064) in BCR-ABL negative patients and not significantly different (14% vs 22%, p=0.77 n.s.) in BCR-ABL positive patients. These results were verified in the following study started in 2000, which included 50 obese (11%) and 385 non-obese patients. In this study, obese patients received 28% and 21% less than the planned doses of VCR and DNR respectively; also they were more likely than non-obese patients to be & gt;30 y of age and BCR-ABL-positive. The incidence of toxicity, toxic deaths and CR were similar in obese and non-obese patients. In the BCR-ABL negative patients, obesity tended to predict EFS. 2y-EFS was 26.6% in the obese and 49.4% in the non-obese patients (p=0.067). By multivariate analysis HR for any events of obesity, WBC & gt;50 and age & gt;30 were respectively 1.53 (0.92–2.58, p=0.107), 1.64 (1.12–2.39, p=0.012) and 1.74 (1.19–2.54, p=0.004). In conclusion, obesity seems associated with a poorer EFS in patients with BCR-ABL negative ALL; this might be caused by the lower doses of chemotherapy obese patients receive. Studies aimed to clarify chemotherapy pharmacokinetics, toxicity and efficacy in obese patients are warranted.
Type of Medium:
Online Resource
ISSN:
0006-4971
,
1528-0020
DOI:
10.1182/blood.V106.11.1828.1828
Language:
English
Publisher:
American Society of Hematology
Publication Date:
2005
detail.hit.zdb_id:
1468538-3
detail.hit.zdb_id:
80069-7
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