Abstract 2839
Background
Obesity carries a high risk of breast cancer with worse treatment outcome. Different molecular subtype and prognostic factors are linked to high body mass index (BMI) and affects overall and progression-free survival.
Methods
All 950 breast cancer patients presented to kasr Alainy oncology center (NEMROCK) from 2004 - 2014 at Al kasr alainy oncology center (NEMROCK) were followed up with a median period of 4.2years till Dec 2018. The body mass index (BMI) was assessed at diagnosis in 760 female patients. Disease-free survival (DFS) and overall survival (OS) were assessed and compared between three groups: non-obese (BMI <30), obese (BMI 30-34.9) and severely obese (BMI >40).
Results
The mean age was 50.1 years with Obesity in 63.29% of cases (23.82% and 39.47% in obese and severely obese respectively). Significant correlations between non-obese and severely obese with age (52 vs.48 years, p < 0.001), menopausal status (31.3 vs.46.9%, p < 0.001), molecular types (non- luminal; 25 vs. 50% p < 0.011), Her2 status (44.4 vs. 27.2%, p = 0.014) and hormonal therapy (Tamoxifen alone, 44.3 vs. 30.4%, p = 0.001). Mean Overall survival(OS) was significantly better in non-obese groups compared to obese and severely obese (102.5, 80, 88months, P=value 0.019), with no impact on DFS (p = 0.40).In multivariate analysis, lymph node stage (p < 0.001; OR: 1; 95% CI: 0.07-0.46), BMI (p = 0.001; OR: 1; 95% CI: 0.14-0.61), and hormonal treatment tamoxifen alone(p = 0.001; OR: 1; 95%CI: 1.4-16.4) remained significantly associated with OS.
Conclusions
severe obesity (BMI >40) have worse overall survival with no impact on disease free survival.
Clinical trial identification
Editorial acknowledgement
Legal entity responsible for the study
The authors.
Funding
Has not received any funding.
Disclosure
All authors have declared no conflicts of interest.
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