An MSM very similar to the one described in equation (1) was tested on simulated data mimicking flexible dose trials for various realistic scenarios (including some probabilities close to 0 to model abrupt changes of dose between 2 visit intervals), involving both positive dose effect and no dose effect in presence of time-dependent confounding.
22 We carried out a survival meta-analysis of the major randomized controlled trials for colorectal cancer screening with flexible sigmoidoscopy to determine its time to benefit, defined as the time to reduction in colorectal cancer related mortality after screening.
Importantly, for the flexible dose trials investigated in the present paper, the protocols did not contain any deterministic or probabilistic rules except allowing dose reduction for AEs, at physician's discretion.
The information gained from MSM analysis of flexible dose trials may not be adequate for conclusive demonstration of the dose relationship for a medication, but may be useful to assess the need for definitive fixed dose trials of a medication and to determine the best design of confirmatory fixed-dose studies.
19 Further, randomized controlled trials for screening colonoscopies will not yield published results for another 7-12 yearsuggestinging that flexible sigmoidoscopy will likely remain an important screening modality in many countries for many years.
TD-OCT has been used in most of the phase 3 clinical trials for antiangiogenic therapy in AMD either as a second outcome examination for central retinal thickness (CRT) or for retreatment indications in trials with a flexible regimen.
Flexible designs for clinical trials permit mid-trial design modifications, which are based on interim information from inside or outside the trial while meeting (regulatory) requirements for the control of the type I error rate.
To investigate dose relationships in flexible dose trials, we analyzed data from olanzapine-treated patients from 2 randomized, double-blind clinical trials with flexible dosing.
Applying IPTW to flexible dose trials of antipsychotics suggested that there was no strong dose relationship for olanzapine.
Therefore, SAR simulators are desired to be modular, that is, flexible for different waveform trials, platform deviations, and different target shapes and orientations.
NORCCAP is a large-scale randomized controlled trial for CRC prevention by flexible sigmoidoscopy (FS).
