1990
Reproductive versus chronologic age as a predictor of low birth weight, preterm delivery and intrauterine growth retardation in primiparous women
Mitchell L, Bracken M. Reproductive versus chronologic age as a predictor of low birth weight, preterm delivery and intrauterine growth retardation in primiparous women. Annals Of Human Biology 1990, 17: 377-386. PMID: 2260840, DOI: 10.1080/03014469000001152.Peer-Reviewed Original ResearchConceptsLow birth weightIntrauterine growth retardationReproductive agePreterm deliveryChronologic agePrimiparous womenBirth weightYoung reproductive ageMaternal raceGrowth retardationSingleton live birthsYounger chronologic ageOlder reproductive ageImportant confounding variablesGroup of womenOlder chronologic agesSmoking statusPregnancy riskLive birthsReproductive outcomesConfounding variablesWomenAgeMenarcheal ageRisk
1987
DELAYED CHILDBEARING: NO EVIDENCE FOR INCREASED RISK OF LOW BIRTH WEIGHT AND PRETERM DELIVERY1
BARKAN S, BRACKEN M. DELAYED CHILDBEARING: NO EVIDENCE FOR INCREASED RISK OF LOW BIRTH WEIGHT AND PRETERM DELIVERY1. American Journal Of Epidemiology 1987, 125: 101-109. PMID: 3788938, DOI: 10.1093/oxfordjournals.aje.a114491.Peer-Reviewed Original ResearchConceptsLow birth weightBirth weightPreterm deliveryPrimiparous womenYale-New Haven HospitalAge 30 yearsMore frequent historyMaternal primiparityPreterm birthSingleton deliveriesGestational ageMaternal ageSpontaneous abortionFrequent historyOlder womenReproductive outcomesAge 30Confounding variablesYoung womenWomenPresent studyAgeRiskDeliveryPrior studies