I would like you to imagine we did not use random assignment in our study of treatment for COVID-19. Unbeknownst to us, our treatment group, compared to the control group, has been populated ...

I would like you to imagine we did not use random assignment in our study of treatment for COVID-19. Unbeknownst to us, our treatment group, compared to the control group, has been populated ...

For each factor you want to assess, you would have one group that is subjected to the factor and one that is not. The groups that are not subjected to the various factors are control groups. 4. Why is ...

or long-term concurrent chemoradiotherapy (CRT group). The protocol design, random assignment, MRI, study quality of assurance and control (NCC2015XC-06), and treatment planning of radiotherapy were ...

in the control group. Treatment groups were comparable with respect to baseline characteristics (Table 1); 77% of patients were postmenopausal, and 63% were FIGO disease stage III or IV. Median age at ...