The role of report/recall bias in case-control studies of low birth weight (LBW) was investigated in women who gave birth at a tertiary hospital.
Prenatal exposure information reported at the postpartum interview was compared with that documented during pregnancy in obstetric records. 169 cases of LBW and 198 controls were selected.
The two sets of information on case mothers and control mothers were compared, using the medical record as a reference.
Kappa values were estimated.
No trend was observed to increase/decrease the sensitivity and specificity of recall.
Agreement on alcohol use was very low : on obstetrical records, only 12 mothers of cases reported habitual alcohol intake at the first prenatal care visit, whereas in the interview 69 said yes to the same question ; in control mothers, the figures were 4 and 89 respectively.
Odds ratios (ORs) of exposure estimated from the two sets of data did not differ importantly in 8 variables.
Interview data yielded ORs for hypertension (8.39 versus 4.63), anemia (0.44 versus 0.99) that were farther from the null, and ORs in the opposite direction for alcohol (0.83 versus 1.61) and any drug (0.64 versus 1.42).
In conclusion, given that OR figures are similar for most variables and no trend is observed in sensitivity/specificity, mothers of normal births can be an adequate reference group, using personal interviews to obtain information on lifestyle, and medical records for conditions.
Mots-clés Pascal : Epidémiologie, Méthode étude, Rappel, Biais méthodologique, Poids naissance faible, Homme, Femelle, Etude cas témoin, Gestation pathologie, Prématurité, Nouveau né pathologie
Mots-clés Pascal anglais : Epidemiology, Investigation method, Recall, Methodological bias, Low birth weight, Human, Female, Case control study, Pregnancy disorders, Prematurity, Newborn diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0461122
Code Inist : 002B30A01A1. Création : 01/03/1996.