Another key difference lies in the sampling error. With a cluster sample, the error can be higher compared to what can come from a random sample, as the variability within clusters may not be as representative of the population variability. However, this is often a trade-off for the logistic...
An example of single-stage cluster sampling – An NGO wants to create a sample of girls across five neighboring towns to provide education. Using single-stage sampling, the NGO randomly selects towns (clusters) to form a sample and extend help to the girls deprived of education in those ...
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This update outlines amendments to the CHAMPION2/STRIPES2 cluster randomised trial protocol primarily made due to the COVID-19 pandemic and nationwide lockdown in India in 2020. These amendments were in line with national guidelines for health research d
In recent years, with the increasing prevalence of prenatal lactation consultation, breastfeeding education, and guidance, mothers of preterm infants have greatly improved their understanding of breastfeeding worldwide. However, a large gap persists in different regions and neonatal intensive care units ...
Resilience theory, which has arisen from the study of risk factors for, and their impact on, positive youth development represents one approach to improving adolescent mental or psychosocial well-being [12–18]. Whilst there is variation in the definition of resilience, it is generally agreed that...
Basically, five steps can be identified in cluster analysis, namely 1) selection of a sample of individuals to be clustered, 2) definition of a set of variables used to measure the individuals in the sample, 3) computation of the similarities between the individuals, 4) use of a cluster ...
A survey of obstetricians in Australia and New Zealand on care for women with DFM showed the majority agreed that maternal concern was the most valid definition of DFM [42]. However, low awareness and knowledge of the importance of DFM, and suboptimal practice in response to women’s reports...
Our a priori definition of the unit of randomisation was a cluster of villages and the health centre where the residents of those villages seek healthcare. We then used the Geographic Information System (GIS) [13] tool to assess the internal validity of our definition by mapping villages to ...
Chronic (systolic) heart failure (CHF) is a common and disabling condition. Adherence to evidence-based guidelines in primary care has been shown to improve health outcomes. The aim was to explore the impact of a multidisciplinary educational interventio