title: Reliability of meat, fish, dairy, and egg intake over a 33-year interval in Adventist Health Study 2.
abstract: We studied Adventist Health Study 2 (AHS-2) cohort members to determine the reliability of long-term recall of adult dietary intake that occurred 33 years ago. Establishing the reliability of these measures supports studies of how dietary exposure across the life course affects risk of cancer and other noncommunicable disease outcomes. Among 1816 AHS-2 cohort members, we conducted a statistical comparison of long-term recall of meat, fish, dairy, and eggs at AHS-2 baseline with their report of current diet 33 years before AHS-2 baseline at an age of 30-60 years. Major findings are as follows: 1) a high correlation for frequency of red meat (R = 0.71), poultry (R = 0.67), and fish (R = 0.60); lower correlations for dairy (R = 0.19) and eggs (R = 0.28); 2) good concordance for dichotomous measures of red meat [sensitivity: 0.70; specificity: 0.92; positive predictive value (PPV): 0.91], poultry (sensitivity: 0.76; specificity: 0.87; PPV: 0.83), fish (sensitivity: 0.61; specificity: 0.93; PPV: 0.89), dairy (sensitivity: 0.95; specificity: 0.57; PPV: 0.99), and eggs (sensitivity: 0.95; specificity: 0.41; PPV: 0.96); negative predictive value for dairy and eggs was poor. Among older AHS-2 cohort members, we found good reliability of recall of red meat, poultry, and fish intake that occurred 33 years earlier.
authors.affiliation: a Center for Health Research , School of Public Health, Loma Linda University , Loma Linda , California , USA.
authors.forename: Pramil N
authors.initials: PN
authors.lastname: Singh
authors.forename: Michael
authors.initials: M
authors.lastname: Batech
authors.forename: Pegah
authors.initials: P
authors.lastname: Faed
authors.forename: Karen
authors.initials: K
authors.lastname: Jaceldo-Siegl
authors.forename: Marcia
authors.initials: M
authors.lastname: Martins
authors.forename: Gary E
authors.initials: GE
authors.lastname: Fraser
mesh_terms: D000328:Adult; D000818:Animals; D015992:Body Mass Index; D015331:Cohort Studies; D003611:Dairy Products; D004531:Eggs; D005247:Feeding Behavior; D005260:Female; D005399:Fishes; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008460:Meat; D011939:Mental Recall; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology; D011200:Poultry; D015203:Reproducibility of Results; D012307:Risk Factors; D011795:Surveys and Questionnaires