The study was carried out in Lombardy (Northern Italy), from 2002 to 2005. By using a stratified cluster sampling design, we recorded Basal Area, one hundred tree trunk diameters at breast height (DBH ...

Design A large population-based cross-sectional study using multistage, stratified cluster random sampling. Setting Data from the Shanghai Children’s Health, Education and Lifestyle Evaluation ...

A total of 16 596 households will be surveyed, allowing the generation of national and regional estimates. A two-stage stratified cluster sampling procedure will be used to select households. In the ...

Methods In a cross-sectional study with random stratified cluster sampling, 160 clusters were chosen from various districts proportionate to the population of each district in Tehran. Following ...

A multi-stage stratified cluster sampling method was used. In the first step, the city was divided into urban and rural administrative units, and schools were selected from three categories: primary, ...

Considering the stratified cluster sampling design of MCS study, weights to adjust for attrition between contacts at successive MCS sweeps and for missing accelerometer data were taken into account ...

The study employed a multi-stage stratified cluster sampling strategy to ensure a representative sample of primary and secondary school students across all 16 districts of Shanghai. In the first stage ...

There are a variety of ways samples can be taken: Simple random (pull names from a hat) Systematic random (i.e., every 5th name) Stratified random (separate samples for each subgroup) Cluster sampling ...

Using the Hubble Space Telescope (HST), astronomers have observed a globular cluster known as NGC 1754 as part of a ...

This important study provides evidence for asymptomatic Bordetella pertussis carriage among mothers in a longitudinal cohort in Zambia, significantly advancing understanding of transmission dynamics.