OBJECTIVES To analyze the factorial structure of a new instrument to assess the quality of the family context (Etxadi-Gangoiti Scale) in a sample from the Gipuzkoa cohort of the Environment and Childhood (Infancia y Medio Ambiente [INMA]) study. METHODS Families in a sample of 433 two-year-old children were assessed in a home visit with subsequent analysis of the factorial structure and psych...

BACKGROUND Standards for the reporting of factorial randomised trials remain to be established. We aimed to review the quality of reporting of methodological aspects of published factorial trials of complex interventions in community settings. METHODS We searched MEDLINE, EMBASE, PsychInfo and the Cochrane Controlled Trials Register to identify factorial randomised trials of complex intervent...

OBJECTIVE To characterize the factorial structure, and psychometric properties of the Brazilian version of the Modified Reasons for Smoking Scale (MRFSS). METHODS Three hundred eleven smokers (214 male; mean age: 37.6 +/- 10.8 years), who had gone to the 'Hemocentro de Ribeirão Preto' to donate blood , answered 21 items of the Brazilian version of the MRFSS, the Fagerström test, and the Crite...

1 Analysis of DNA Chains by Means of Factorial Moments Huijie Yang Fangcui Zhao Physics Institute, Hebei University of Technology, Tianjin 300130, China Yizhong Zhuo Xizhen Wu China Institute of Atomic Energy, Beijing 102413, P.O.X 275(18), China Abstract By means of the concept of factorial moments we examine DNA sequences from yeast to distinguish coding and non-coding regions. It is found th...

Factorial experiments are widely used in industrial experimentation and other fields. Whenever a factorial experiment is not designed as a full factorial but as a – regular or non-regular – fraction thereof, choice between competing designs and interpretation of experimental results should take into consideration how the experimental plan will confound experimental effects. This article propose...

Characterized by simultaneous measurement of the effects of experimental factors and their interactions, the economic and efficient factorial design is well accepted in microarray studies. To date, the only statistical method for analyzing microarray data obtained using factorial design has been the analysis of variance (ANOVA) model which is a gene by gene approach and relies on multiple assum...

For the accurate analysis of possible interactive effects of chemicals in a defined mixture, statistical designs are necessary to develop clear and manageable experiments. For instance, factorial designs have been successfully used to detect two-factor interactions. Particularly useful for this purpose are fractionated factorial designs, requiring only a fraction of all possible combinations of...