2023
Sample size considerations for assessing treatment effect heterogeneity in randomized trials with heterogeneous intracluster correlations and variances
Tong G, Taljaard M, Li F. Sample size considerations for assessing treatment effect heterogeneity in randomized trials with heterogeneous intracluster correlations and variances. Statistics In Medicine 2023, 42: 3392-3412. PMID: 37316956, DOI: 10.1002/sim.9811.Peer-Reviewed Original ResearchConceptsGroup treatment trialsTreatment effect modificationRandomized trialsTreatment trialsEffect modificationEffect modifiersIntracluster correlation coefficientIndividual-level effect modifiersStudy armsTreatment effect heterogeneityOutcome observationsContinuous outcomesTrialsGroup treatmentTreatment effectsOutcome varianceEffect heterogeneityIntracluster correlationSample sizeSample size formula
2021
Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child anemia and micronutrient status: an individual participant data meta-analysis of randomized controlled trials
Wessells K, Arnold C, Stewart C, Prado E, Abbeddou S, Adu-Afarwuah S, Arnold B, Ashorn P, Ashorn U, Becquey E, Brown K, Byrd K, Campbell R, Christian P, Fernald L, Fan Y, Galasso E, Hess S, Huybregts L, Jorgensen J, Kiprotich M, Kortekangas E, Lartey A, Le Port A, Leroy J, Lin A, Maleta K, Matias S, Mbuya M, Mridha M, Mutasa K, Naser A, Paul R, Okronipa H, Ouédraogo J, Pickering A, Rahman M, Schulze K, Smith L, Weber A, Zongrone A, Dewey K. Characteristics that modify the effect of small-quantity lipid-based nutrient supplementation on child anemia and micronutrient status: an individual participant data meta-analysis of randomized controlled trials. American Journal Of Clinical Nutrition 2021, 114: 68-94. PMID: 34590114, PMCID: PMC8560313, DOI: 10.1093/ajcn/nqab276.Peer-Reviewed Original ResearchConceptsSmall-quantity lipid-based nutrient supplementsPrevalence of anemiaIndividual participant dataIron deficiencyRetinol-binding proteinEffect modifiersChild anemiaSmall-quantity lipid-based nutrient supplementationStatus outcomesIndividual-level effect modifiersLipid-based nutrient supplementationLipid-based nutrient supplementsParticipant dataIndividual-level modifiersIron deficiency anemiaFe/dMo of ageFixed-effects modelDeficiency anemiaChild's hemoglobinEffect modificationIron statusChildren 6Study design characteristicsPlasma zinc
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