The FOCUS4 trial in CRC uses group-sequential multi-arm multi-stage methodology.
The influence of high-efficiency external walls, roofs, windows, ventilation units and solar collectors on energy use and construction costs were studied by using multi-stage methodology for reducing the number of combinations.
Zwickau University has developed a new multi-stage methodology for the complex design process of upgrading rural roads.
NHANES participants are sampled through a complex, multi-stage sampling methodology to ensure that the sample is nationally representative.
As previously described [ 9], 18 000 residents of China aged 18-80 years were selected randomly using a stratified, multi-stage sampling methodology.
A randomized, stratified, multi-stage sampling methodology was used to select 18 000 adults aged 18-80 years from Shanghai, Beijing, Xi'an, Wuhan and Guangzhou.
As described in detail elsewhere [ 10], 18 000 residents of China aged 18-80 years (n = 3600 from each study region) were randomly selected using a stratified, multi-stage sampling methodology.
In total, 18 000 adults aged 18-80 years were randomly selected from Shanghai, Beijing, Xi'an, Wuhan and Guangzhou, using a stratified, multi-stage sampling methodology.
A multi stage sampling technique was employed.
A multi stage cluster sampling was applied.
A randomized, stratified, multi-stage cluster sampling methodology was used to select a representative sample of the general population in Shanghai.
