Measuring Compliance in Mobile Longitudinal Repeated-Measures Design Study
نویسندگان
چکیده
منابع مشابه
Impact of air pollution on pulmonary function and respiratory symptoms in children. Longitudinal repeated-measures study
BACKGROUND Salamanca, Mexico occupied fourth place nationally in contaminating emissions. The aim of the study was to determine the impact of air pollution on the frequency of pulmonary function alterations and respiratory symptoms in school-age children in a longitudinal repeated-measures study. METHODS We recruited a cohort of 464 children from 6 to 14 years of age, from two schools differi...
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Longitudinal studies could be complicated by left-censored repeated measures. For example, in Human Immunodeficiency Virus infection, there is a detection limit of the assay used to quantify the plasma viral load. Simple imputation of the limit of the detection or of half of this limit for left-censored measures biases estimations and their standard errors. In this paper, we review two likeliho...
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متن کاملRepeated Measures
Repeated measures refer to the observations taken on the same subject (plant, animal, person, etc). There is usually a variation among the subjects, which is modeled by random effects. Here is an example. A completely randomized design with a single factor (with fertilizer or without). Each treatment is applied to three plants and the root length of each plant is measured on five occasions (wee...
متن کاملRepeated measures.
A repeated-measures design is one in which multiple, or repeated, measurements are made on each experimental unit. The experimental unit could be a person or an animal, and repeated measurements might be taken serially in time, such as in weekly systolic blood pressures or monthly weights. The repeated assessments might be measured under different experimental conditions. Repeated measurements ...
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ژورنال
عنوان ژورنال: Survey Practice
سال: 2013
ISSN: 2168-0094
DOI: 10.29115/sp-2013-0023