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Study flowchart and breakdown of study participants used in analyses 

Study flowchart and breakdown of study participants used in analyses 

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Background We examined the association between metabolic dysregulation and cancer mortality in a prospective cohort of Black and White adults. MethodsA total of 25,038 Black and White adults were included in the analysis. Metabolic dysregulation was defined in two ways: 1) using the joint harmonized criteria for metabolic syndrome (MetS) and 2) bas...

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... 30,239 REGARDS participants, 5201 were excluded due to missing data for exposure (components of metabolic syndrome) or follow-up time, resulting in 25,038 participants remaining for the main analysis (Fig. 1). The most common cancer deaths were lung (27.5%), gastro-intestinal (20.6%), and hematological (10.6%) (Additional file 1). As shown in Table 1, Black participants were younger (63.8 vs. 65.3 years), less likely to be male (37.9% vs. 49.9%), had lower education (19.0% vs. 7.1% with less than high school education), and lower income (25.6% vs. 11.8% with less than $20,000 house- hold income) compared with White participants (p values <0.01). Compared with White participants, Black partici- pants had higher total body weight (87.7 vs. 82.4 kg), WC were at an increased risk of cancer mortality. Among White participants, those with reduced HDL-cholesterol (AHR: 1.27, 95% CI: 1.03-1.55) were at an increased risk of cancer mortality. The associations between MetS and cancer mor- tality attenuated in models excluding baseline chronic med- ical conditions (Additional file ...
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... performed factor analysis and identified six distinct fac- tors associated with metabolic dysregulation among 19,963 participants with complete data on 15 metabolism-related Fig. 2 Kaplan-Meier plot for time to cancer death by number of metabolic syndrome components variables ( Fig. 1 and Additional file 3, previously introduced in methods). The distribution of each metabolic dysregula- tion factor by demographic and socioeconomic characteris- tics of REGARDS participants are provided in Additional file 4. Among all participants (Table 3 and Additional file 5), those in the highest quartile of the glucose (4th quartile AHR: 1.35; 95% CI: 1.08-1.61) were at an increased risk of cancer mortality, while participants in the highest quartiles for obesity (4th quartile AHR: 0.68; 95% CI: 0.49-0.94) and cholesterol (3rd vs. 1st quartile AHR: 0.81; 95% CI: 0.65- .99) factors had reduced risk of cancer mortality compared with those in the first quartile. Black and White participants within higher quartiles of the obesity factor had a reduced risk of cancer mortality compared with those in the lowest quartile, however Blacks in the highest quartile of the glu- cose factor experienced increased risk (AHR: 1.57; 95% CI: 1.10-2.23) for cancer mortality compared with those in the first quartile. White participants with one (AHR: 1.60, 95% CI: 1.16-2.19) or two (AHR: 1.52, 95% CI: 1.08-2.14) of any factor in the highest quartile were at an increased risk of cancer mortality. The associations between derived factors for metabolic dysregulation and cancer mortality were simi- lar in models excluding baseline chronic medical conditions (Additional file ...

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... In a Korean population-based study (36) and in another study combining seven cohorts from three European countries (37), researchers found elevated BP was significantly associated with increased total cancer death. Specifying racial groups, one study found a null association of hypertension and total cancer mortality in whites and a marginal significant association in blacks (38). Another one found a significantly higher risk of breast cancer death in black women than in white women (26). ...
... We also found in whites, compared to individuals with normal fasting glucose level, those with impaired level had a 45% higher risk of total cancer death while in blacks, the association did not reach to statistical significance. Even though mortality specifically due to diabetes has been reported higher in blacks than in whites (38), few studies have examined whether the impaired fasting glucose level causes discrepancies in overall cancer death between blacks and white. One study evaluating a group of individuals 45 years of age and older found impaired fasting glucose significantly increased risk for cancer death in blacks but not in whites (38) while two breast cancer studies found diabetes was associated with a significantly increased hazard for breast cancer-specific death in white patients only (27,28). ...
... Even though mortality specifically due to diabetes has been reported higher in blacks than in whites (38), few studies have examined whether the impaired fasting glucose level causes discrepancies in overall cancer death between blacks and white. One study evaluating a group of individuals 45 years of age and older found impaired fasting glucose significantly increased risk for cancer death in blacks but not in whites (38) while two breast cancer studies found diabetes was associated with a significantly increased hazard for breast cancer-specific death in white patients only (27,28). Researchers also found diabetes was associated with a later state of cancer diagnosis and more aggressive tumor grade for white women only, which in part, may account for the survival reduction in white women (28). ...
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