1996
Tree-based, Two-stage Risk Factor Analysis for Spontaneous Abortion
Zhang H, Bracken M. Tree-based, Two-stage Risk Factor Analysis for Spontaneous Abortion. American Journal Of Epidemiology 1996, 144: 989-996. PMID: 8916510, DOI: 10.1093/oxfordjournals.aje.a008869.Peer-Reviewed Original ResearchConceptsSpontaneous abortionPutative risk factorsRisk factorsPotential confoundersFirst monthYears of smokingNegative pregnancy outcomesNumber of pregnanciesRisk factor analysisNew risk factorsPotential confounding factorsPregnancy outcomesGynecologic problemsMaternal ageMore cupsMother's heightPregnancyConfounding factorsPassive exposureCocaine useLogistic regressionMantel-HaenszelAbortionConfoundersBirth control
1990
Association of cocaine use with sperm concentration, motility, and morphology
Bracken M, Eskenazi B, Sachse K, McSharry J, Hellenbrand K, Leo-Summers L. Association of cocaine use with sperm concentration, motility, and morphology. Fertility And Sterility 1990, 53: 315-322. PMID: 2298313, DOI: 10.1016/s0015-0282(16)53288-9.Peer-Reviewed Original ResearchConceptsCocaine useRisk factorsMale subfertilityMajor risk factorGeneral male populationFirst semen analysisUse of cocaineHigh prevalenceLow sperm motilitySperm countDiagnostic InterviewMale populationSemen analysisHistory of useSperm concentrationAbnormal formsSubfertilityMore yearsSperm motilityCocaineMenAssociationLarge proportionMotilityYears