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Association of vitamin C, vitamin D, vitamin E and risk of bladder cancer: a dose-response meta-analysis.

Scientific reports
January 1, 1970
Fuqiang Chen et al. (6 authors)
Journal ArticleMeta-AnalysisHuman Study
Study Details

Study Goal

The researchers aimed to determine the association between Vitamin C intake and the risk of bladder cancer through a dose-response meta-analysis.

Results Summary

The study found no significant association between Vitamin C and the risk of bladder cancer in the dose-response analysis. The effects of Vitamin C were not statistically significant, unlike Vitamin D and E, which showed varying associations.

Population

General population, with specific analysis among smokers and non-smokers.

Effective Dosage

Not specified

Duration

Not specified

Interactions

None mentioned

Extracted Claims (16)
InterventionDirectionEndpointPopulationDosageImpactClaim #
vitamin D from diet plus supplement
no change
risk of bladder cancer
-
0.99 (0.95-1.03) for every 100 IU/day increment
relative risk
#1
circulating vitamin D
decrease
risk of bladder cancer
-
0.95 (0.90-1.00) for every 10 nmol/L increment
relative risk
#2
vitamin E from diet plus supplement
no change
risk of bladder cancer
-
0.96 (0.90-1.02) for every 10 mg/day increment
relative risk
#3
vitamin E from diet
decrease
risk of bladder cancer
-
0.83 (0.72-0.95) for every 10 mg/day increment
relative risk
#4
vitamin E from supplement
no change
risk of bladder cancer
-
0.88 (0.67-1.15) for every 10 mg/day increment
relative risk
#5
circulating α-Tocopherol
decrease
risk of bladder cancer
-
0.84 (0.76-0.94) for every 1 mg/dL increment
relative risk
#6
circulating γ-Tocopherol
increase
risk of bladder cancer
-
1.22 (1.00-1.49) for every 0.1 mg/dL increment
relative risk
#7
vitamin D
decrease
risk of bladder cancer
smokers
significant
observed association
#8
vitamin D
no change
risk of bladder cancer
non-smokers
not significant
observed association
#9
vitamin E
decrease
risk of bladder cancer
smokers
significant
observed association
#10
vitamin E
no change
risk of bladder cancer
non-smokers
not significant
observed association
#11
vitamin C
no change
risk of bladder cancer
-
no significant association
association
#12
vitamin D
decrease
bladder cancer
-
inversely associated
risk
#13
vitamin E
decrease
bladder cancer
-
inversely associated
risk
#14
α-Tocopherol
decrease
bladder cancer
-
inversely associated
risk
#15
γ-Tocopherol
increase
bladder cancer
-
positively associated
risk
#16
Abstract

A dose-response meta-analysis was conducted to assess the association of vitamin C, D, E with risk of bladder cancer. Pertinent studies were identified in PubMed and Embase. The random-effect model was used. The relative risk (95% confidence interval) of bladder cancer was 0.99 (0.95-1.03) for every 100 IU/day increment in vitamin D from diet plus supplement and 0.95 (0.90-1.00) for every 10 nmol/L increment in circulating vitamin D. The effect for every 10 mg/day increment was 0.96 (0.90-1.02) for vitamin E from diet plus supplement, 0.83 (0.72-0.95) from diet and 0.88 (0.67-1.15) from supplement, and the effect was 0.84 (0.76-0.94) for every 1 mg/dL increment in circulating α-Tocopherol and 1.22 (1.00-1.49) for every 0.1 mg/dL increment in circulating γ-Tocopherol. The observed association for vitamin D and vitamin E was significant among smokers but not among non-smokers. No significant association was found between vitamin C and risk of bladder cancer in the dose-response analysis. Based on the dose-response analysis, the risk of bladder cancer might be inversely associated with vitamin D and E (especially α-Tocopherol), but positively associated with γ-Tocopherol.

Medical Subject Headings (MeSH)
Ascorbic AcidDatabases, FactualDietDietary SupplementsDose-Response Relationship, DrugHumansRiskSmokingUrinary Bladder NeoplasmsVitamin DVitamin Ealpha-Tocopherolgamma-Tocopherol
Study Links
Quality Scores
SafetyNot Assessed
Efficacy10/10
Quality85/10
Citation Metrics
Total Citations37
Citations/Year3.7
Relative Citation Ratio1.46
NIH Percentile64.2%
Research Impact Scores
APT Score0.75
Weight Score1.89
Normalized Score0.41
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