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Interim analysis after inclusion of 53 patients (50%) will provide the definitive sample size.
Assuming these values, the definitive sample size for the study was set at 604 subjects, randomised as described above.
As a more definitive sample of absence points, we used locality records for an ecologically similar congener, S. cernua.
Our pilot data support the idea that minimal or no adjustments to the definitive sample size calculation are required for losses to follow-up.
Bearing this in mind, the distribution shown in the column "Definitive Sample" in Table 2 was obtained, this distribution was used for the study.
Interim analysis after inclusion of 53 patients (50%) will provide the definitive sample size, which will be calculated based on the observed number of complications in the EBD group.
Similar(49)
However, as the definitive study sample was relatively small, p-values of < 0.1 were also reported [ 43].
The most invasive biopsy is a surgical exploration; video assisted thoracoscopic surgery (VATS) or thoracotomy provides the most definitive tissue sample for the pathologist.
We estimated that 60 patients would represent approximately 5%to10%0% of the definitive RCT sample size (600 to 1200 patients), based on a pairwise comparison with an alpha of 0.05, a beta of 0.20 (80% power), a relative risk reduction of 50%, and a range of plausible SSI rates.
There are no definitive answers regarding sample size requirements for IRT, however sample sizes of 100 are often adequate [ 61].
Tumor samples from patients with residual disease were also collected at definitive surgery.Serum samples (4.9 mL whole blood per sample) for biomarker assessment were collected at baseline and at the time of definitive surgery.
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