Satia 2009

ID70
TitleValidation of an antioxidant nutrient questionnaire in Whites and African Americans
AuthorsSatia, J. A.; Watters, J. L.; Galanko, J. A.
Year2009
JournalJ Am Diet Assoc
Volume109
Issue3
Pages502-8, 508.e1
PubMed ID19248870
DOI10.1016/j.jada.2008.11.033

Subjects

IDParent IDDepthSubject groupPopulationCountryCountry codeEthnicityCohortHealth conditionSmoker proportionSupplement users excluded?GenderFemale proportionSizeAge meanAge SDAge minAge maxAge medianHeight meanHeight SDHeight minHeight maxHeight medianWeight meanWeight SDWeight minWeight maxWeight medianBMI meanBMI SDBMI minBMI maxBMI median
2540All [by ethnicity]Whites and African Americans in North CarolinaUnited StatesUSAfrican American (51%), White (49%)DISH (DIet, Supplements, and Health Study)HealthyNoFemale + Male51.016431.920.045.0
2552541WhitesWhites and African Americans in North CarolinaUnited StatesUSWhite (100%)DISH (DIet, Supplements, and Health Study)HealthyNoFemale + Male52.08132.57.9
2562541African AmericansWhites and African Americans in North CarolinaUnited StatesUSAfrican American (100%)DISH (DIet, Supplements, and Health Study)HealthyNoFemale + Male53.08330.97.9

Biomarker concentration values

IDParent IDDepthSubject groupPopulationCountryCountry codeCohortTime definitionBiospecimenAnalytical methodBiomarkerBiomarker detailMeasurement sizeDetected (nb)Detected (%)Detected only?Arithmethic meanArithmethic SDGeometric meanGeometric SDMinMin (detected)Percentile_05Percentile_10Percentile_25MedianPercentile_75Percentile_90Percentile_95MaxInterquartile rangeMean 95% CI lowerMean 95% CI upperGMean 95% CI lowerGMean 95% CI upperUnitConverted arithmetic meanConverted geometric meanConverted medianAdjustment typeAdjusted onRegressed onExpressed as
21090WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCbeta-Carotene810.1310.190.302umol/L190.0 nmol/LCrude
21100WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCalpha-Carotene810.0280.0510.085umol/L51.0 nmol/LCrude
21110WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCbeta-Cryptoxanthin810.0620.0910.119umol/L91.0 nmol/LCrude
21120WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCLutein/Zeaxanthin810.0960.1280.166umol/L128.0 nmol/LCrude
21130WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCLycopene810.2950.3920.476umol/L392.0 nmol/LCrude
21150WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCalpha-Tocopherol818.09.711.7umol/L9700.0 nmol/LCrude
21160WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCAscorbic acid817.019.069.87umol/L9060.0 nmol/LCrude
21330African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCbeta-Carotene830.0940.1330.233umol/L133.0 nmol/LCrude
21340African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCalpha-Carotene830.0190.0310.046umol/L31.0 nmol/LCrude
21350African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCbeta-Cryptoxanthin830.0580.0940.135umol/L94.0 nmol/LCrude
21360African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCLutein/Zeaxanthin830.0890.1140.141umol/L114.0 nmol/LCrude
21370African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCLycopene830.3110.4020.549umol/L402.0 nmol/LCrude
21390African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCalpha-Tocopherol836.07.49.0umol/L7400.0 nmol/LCrude
21400African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Plasma, semi-fastingHPLCAscorbic acid836.598.199.69umol/L8190.0 nmol/LCrude

Intake values

IDParent IDDepthSubject groupPopulationCountryCountry codeCohortTime definitionIntake toolIntake food coverageIntake time coverageIntake assessmentCompoundCompound detailSupplement intakes included?Measurement sizeDetected (nb)Detected (%)Detected only?Arithmethic meanArithmethic SDGeometric meanGeometric SDMinMin (detected)Percentile_05Percentile_10Percentile_25MedianPercentile_75Percentile_90Percentile_95MaxInterquartile rangeMean 95% CI lowerMean 95% CI upperGMean 95% CI lowerGMean 95% CI upperUnitConverted arithmetic meanConverted geometric meanConverted medianAdjustment typeAdjusted onRegressed onExpressed as
20930WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Carotene812168.03625.06168.0ug/day3.6 mg/dayCrude
20940WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Carotene81296.0617.0976.0ug/day0.6 mg/dayCrude
20950WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Cryptoxanthin8185.0194.0327.0ug/day0.2 mg/dayCrude
20960WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lutein/Zeaxanthin811607.03034.04843.0ug/day3.0 mg/dayCrude
20970WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lycopene812986.04343.07654.0ug/day4.3 mg/dayCrude
20990WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Tocopherol817.312.817.8mg/day12.8 mg/dayCrude
21000WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Vitamin C8186.0145.0202.0mg/day145.0 mg/dayCrude
21010WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Carotene811708.02937.04488.0ug/day2.9 mg/dayCrude
21020WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Carotene81122.0305.0718.0ug/day0.3 mg/dayCrude
21030WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Cryptoxanthin8176.0164.0294.0ug/day0.2 mg/dayCrude
21040WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lutein/Zeaxanthin811201.02411.03694.0ug/day2.4 mg/dayCrude
21050WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lycopene812868.04890.010446.0ug/day4.9 mg/dayCrude
21070WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Tocopherol816.59.713.6mg/day9.7 mg/dayCrude
21080WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Vitamin C8173.0105.0158.0mg/day105.0 mg/dayCrude
21170African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Carotene831267.02865.05490.0ug/day2.9 mg/dayCrude
21180African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Carotene8396.0242.0714.0ug/day0.2 mg/dayCrude
21190African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Cryptoxanthin8368.0125.0379.0ug/day0.1 mg/dayCrude
21200African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lutein/Zeaxanthin831057.01936.03982.0ug/day1.9 mg/dayCrude
21210African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lycopene832258.03970.07916.0ug/day4.0 mg/dayCrude
21230African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Tocopherol833.87.612.5mg/day7.6 mg/dayCrude
21240African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Vitamin C8358.0110.0217.0mg/day110.0 mg/dayCrude
21250African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Carotene83988.02151.04072.0ug/day2.2 mg/dayCrude
21260African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Carotene8370.0175.0419.0ug/day0.2 mg/dayCrude
21270African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Cryptoxanthin8339.0140.0297.0ug/day0.1 mg/dayCrude
21280African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lutein/Zeaxanthin83934.01631.02907.0ug/day1.6 mg/dayCrude
21290African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lycopene831219.03241.06129.0ug/day3.2 mg/dayCrude
21310African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Tocopherol835.16.99.3mg/day6.9 mg/dayCrude
21320African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Vitamin C8354.090.0135.0mg/day90.0 mg/dayCrude

Correlation values

IDIntake IDExcretion IDSubject groupPopulationCountryCountry codeCohortIntake Time definitionIntake assessmentIntakeIntake detailSupplement intakes included?Intake Arithmetic meanIntake Geometric meanIntake MedianIntake UnitIntake Adjusted onBiomarker Time definitionBiological specimenBiomarker Experimental methodBiomarkerBiomarker detailBiomarker Arithmetic meanBiomarker Geometric meanBiomarker MedianBiomarker UnitBiomarker Adjusted onCorrelation sizeCorrelation typeCorrelation valueCorrelation 95% CI lowerCorrelation 95% CI upperCorrelation p-valueSignificant?Measurement adjustmentDeattenuated?Covariates
189620932109WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Carotene3625.0ug/dayPlasma, semi-fastingHPLCbeta-Carotene0.19umol/L81Pearson0.33< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
189720942110WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Carotene617.0ug/dayPlasma, semi-fastingHPLCalpha-Carotene0.051umol/L81Pearson0.31< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
189820952111WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Cryptoxanthin194.0ug/dayPlasma, semi-fastingHPLCbeta-Cryptoxanthin0.091umol/L81Pearson0.28< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
189920962112WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lutein/Zeaxanthin3034.0ug/dayPlasma, semi-fastingHPLCLutein/Zeaxanthin0.128umol/L81Pearson0.24< 0.05YesNoAge, Sex, Education, BMI, Cholesterol
190020972113WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lycopene4343.0ug/dayPlasma, semi-fastingHPLCLycopene0.392umol/L81Pearson0.12>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
190120982114WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Retinolmissing unitPlasma, semi-fastingHPLCRetinolmissing unit81Pearson0.12>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
190220992115WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Tocopherol12.8mg/dayPlasma, semi-fastingHPLCalpha-Tocopherol9.7umol/L81Pearson0.15>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
190321002116WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Vitamin C145.0mg/dayPlasma, semi-fastingHPLCAscorbic acid9.06umol/L81Pearson0.15>= 0.05NoNoAge, Sex, Education, BMI
191221012109WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Carotene2937.0ug/dayPlasma, semi-fastingHPLCbeta-Carotene0.19umol/L81Pearson0.24< 0.05YesNoAge, Sex, Education, BMI, Cholesterol
191321022110WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Carotene305.0ug/dayPlasma, semi-fastingHPLCalpha-Carotene0.051umol/L81Pearson0.19>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
191421032111WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Cryptoxanthin164.0ug/dayPlasma, semi-fastingHPLCbeta-Cryptoxanthin0.091umol/L81Pearson0.14>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
191521042112WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lutein/Zeaxanthin2411.0ug/dayPlasma, semi-fastingHPLCLutein/Zeaxanthin0.128umol/L81Pearson0.31< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
191621052113WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lycopene4890.0ug/dayPlasma, semi-fastingHPLCLycopene0.392umol/L81Pearson0.08>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
191721062114WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Retinolmissing unitPlasma, semi-fastingHPLCRetinolmissing unit81Pearson0.14>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
191821072115WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Tocopherol9.7mg/dayPlasma, semi-fastingHPLCalpha-Tocopherol9.7umol/L81Pearson0.19>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
191921082116WhitesWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Vitamin C105.0mg/dayPlasma, semi-fastingHPLCAscorbic acid9.06umol/L81Pearson0.2>= 0.05NoNoAge, Sex, Education, BMI
190421172133African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Carotene2865.0ug/dayPlasma, semi-fastingHPLCbeta-Carotene0.133umol/L83Pearson0.27< 0.05YesNoAge, Sex, Education, BMI, Cholesterol
190521182134African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Carotene242.0ug/dayPlasma, semi-fastingHPLCalpha-Carotene0.031umol/L83Pearson0.31< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
190621192135African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)beta-Cryptoxanthin125.0ug/dayPlasma, semi-fastingHPLCbeta-Cryptoxanthin0.094umol/L83Pearson0.33< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
190721202136African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lutein/Zeaxanthin1936.0ug/dayPlasma, semi-fastingHPLCLutein/Zeaxanthin0.114umol/L83Pearson0.32< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
190821212137African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Lycopene3970.0ug/dayPlasma, semi-fastingHPLCLycopene0.402umol/L83Pearson0.11>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
190921222138African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Retinolmissing unitPlasma, semi-fastingHPLCRetinolmissing unit83Pearson0.23< 0.05YesNoAge, Sex, Education, BMI, Cholesterol
191021232139African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)alpha-Tocopherol7.6mg/dayPlasma, semi-fastingHPLCalpha-Tocopherol7.4umol/L83Pearson0.12>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
191121242140African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)Food Frequency Questionnaire (FFQ)Vitamin C110.0mg/dayPlasma, semi-fastingHPLCAscorbic acid8.19umol/L83Pearson0.1>= 0.05NoNoAge, Sex, Education, BMI
192821252133African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Carotene2151.0ug/dayPlasma, semi-fastingHPLCbeta-Carotene0.133umol/L83Pearson0.24< 0.05YesNoAge, Sex, Education, BMI, Cholesterol
192921262134African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Carotene175.0ug/dayPlasma, semi-fastingHPLCalpha-Carotene0.031umol/L83Pearson0.13>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
193021272135African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)beta-Cryptoxanthin140.0ug/dayPlasma, semi-fastingHPLCbeta-Cryptoxanthin0.094umol/L83Pearson0.43< 0.0001YesNoAge, Sex, Education, BMI, Cholesterol
193121282136African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lutein/Zeaxanthin1631.0ug/dayPlasma, semi-fastingHPLCLutein/Zeaxanthin0.114umol/L83Pearson0.48< 0.0001YesNoAge, Sex, Education, BMI, Cholesterol
193221292137African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Lycopene3241.0ug/dayPlasma, semi-fastingHPLCLycopene0.402umol/L83Pearson0.28< 0.01YesNoAge, Sex, Education, BMI, Cholesterol
193321302138African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Retinolmissing unitPlasma, semi-fastingHPLCRetinolmissing unit83Pearson0.12>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
193421312139African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)alpha-Tocopherol6.9mg/dayPlasma, semi-fastingHPLCalpha-Tocopherol7.4umol/L83Pearson0.14>= 0.05NoNoAge, Sex, Education, BMI, Cholesterol
193521322140African AmericansWhites and African Americans in North CarolinaUnited StatesUSDISH (DIet, Supplements, and Health Study)24-h Dietary recall (1-day)Vitamin C90.0mg/dayPlasma, semi-fastingHPLCAscorbic acid8.19umol/L83Pearson0.17>= 0.05NoNoAge, Sex, Education, BMI

Reproducibility values

No data available