title: Impact of time to maternal interview on interview responses in the National Birth Defects Prevention Study.
abstract: Prenatal exposures often are assessed using retrospective interviews. Time from exposure to interview may influence data accuracy. We investigated the association of time to interview (TTI) with aspects of interview responses in the National Birth Defects Prevention Study, a population-based case-control study of birth defects in 10 US states. Mothers completed a computer-assisted telephone interview 1.5-24 months after their estimated date of delivery. Proxy metrics for interview quality were whether certain exposures were reported, whether the start month of reported medication use or illness was reported, or whether responses were missing. Interaction by case status was assessed. Interviews were completed with 30,542 mothers (22,366 cases and 8,176 controls) who gave birth between 1997 and 2007. Mothers of cases were interviewed later than were mothers of controls (11.7 months vs. 9.5 months, respectively). In adjusted analyses, having a TTI that was greater than 6 months was associated with only a few aspects of interview responses (e.g., start month of pseudoephedrine use). Interaction by case-control status was observed for some exposures; mothers of controls had a greater reduction in interview quality with increased TTI in these instances (e.g., report of morning sickness, start month of acetaminophen use and ibuprofen use). The results suggest that TTI might impact interview responses; however, the impact may be minimal and specific to the type of exposure.
authors: National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, 1600 Clifton Road NE, Mail-Stop E86, Atlanta, GA 30333, USA. zzu9@cdc.gov
authors: Sarah C
authors: SC
authors: Tinker
authors: Cassandra
authors: C
authors: Gibbs
authors: Matthew J
authors: MJ
authors: Strickland
authors: Owen J
authors: OJ
authors: Devine
authors: Krista S
authors: KS
authors: Crider
authors: Martha M
authors: MM
authors: Werler
authors: Marlene T
authors: MT
authors: Anderka
authors: Jennita
authors: J
authors: Reefhuis
mesh_terms: D016022:Case-Control Studies; D000013:Congenital Abnormalities / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D018811:Maternal Exposure; D011247:Pregnancy; D012107:Research Design; D014481:United States / Q000453:epidemiology
keywords: bias (epidemiology); case-control studies; interviews as topic
references: BJOG. 2007 Feb;114(2):195-200
references: 17166217
references: Am J Obstet Gynecol. 2007 Mar;196(3):233.e1-6
references: 17346533
references: Am J Epidemiol. 1982 Apr;115(4):538-48
references: 7041633
references: Public Health Rep. 2001;116 Suppl 1:32-40
references: 11889273
references: Pharmacoepidemiol Drug Saf. 2011 Nov;20(11):1210-6
references: 21913281
references: J Clin Epidemiol. 2006 Dec;59(12):1319-25
references: 17098575
references: Paediatr Perinat Epidemiol. 2006 Nov;20(6):520-7
references: 17052290
references: Am J Epidemiol. 1989 Jan;129(1):65-75
references: 2910073
references: Ann Epidemiol. 2006 Jun;16(6):429-31
references: 16280248
references: Am J Epidemiol. 1997 Jan 1;145(1):58-67
references: 8982023
references: Birth. 2010 Mar;37(1):37-43
references: 20402720
references: Am J Obstet Gynecol. 2003 Jul;189(1):195-200
references: 12861162
references: Am J Epidemiol. 2009 Oct 15;170(8):975-85
references: 19736223
references: Perspect Sex Reprod Health. 2006 Jun;38(2):90-6
references: 16772190
references: Schizophr Res. 2004 Dec 1;71(2-3):417-26
references: 15474913