2025
Nonparametric Estimation of the Potential Impact Fraction and the Population Attributable Fraction With Individual‐Level and Aggregated Data
Chan C, Zepeda‐Tello R, Camacho‐García‐Formentí D, Cudhea F, Meza R, Rodrigues E, Spiegelman D, Barrientos‐Gutierrez T, Zhou X. Nonparametric Estimation of the Potential Impact Fraction and the Population Attributable Fraction With Individual‐Level and Aggregated Data. Statistics In Medicine 2025, 44: e70214. PMID: 40798868, DOI: 10.1002/sim.70214.Peer-Reviewed Original ResearchConceptsDistributional assumptionsFinite sample performanceImpact of distributional assumptionsPotential impact fractionNonparametric estimationSample performanceDistributional violationsPopulation attributable fractionImpact fractionNonparametric methodsSimulation studyContinuous exposure dataPopulation impact fractionsAttributable fractionSugar-sweetened beverage consumptionIncidence of type 2 diabetesAssumptionsExposure distributionEstimationAggregate dataBeverage consumptionNonparametricType 2 diabetesIndividual-levelTarget population
2004
Equivalence of conditional and marginal regression models for clustered and longitudinal data
Ritz J, Spiegelman D. Equivalence of conditional and marginal regression models for clustered and longitudinal data. Statistical Methods In Medical Research 2004, 13: 309-323. DOI: 10.1191/0962280204sm368ra.Peer-Reviewed Original ResearchGeneral link functionLink functionPositive stable frailtyMarginal regression parametersCertain statistical modelsMarginal mean parametersConditional meanFurther distributional assumptionsNormal random effectsRandom effectsMarginal regression modelsConditional mean functionSlope parameterMarginal meansRegression parametersMean functionStatistical modelProbit linkMeans coincideDistributional assumptionsMean parametersMarginal hazardCovariates of interestEquivalent interpretationWeibull proportional hazards
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