Breathing is something we are required to maintain throughout the duration of our sojourn here so I am calling it: The Assignment of a Lifetime.
Breast cancer is a heterogeneous disease, with grades of metastatic potential and length of sojourn time [ 51].
The introduction of access dates and the reduction of stocking densities and/or the duration of the herds' sojourn in particular areas may help to improve herbage offer and to sustain animal production.
We therefore performed three analyses of lead time, assuming average sojourn time (duration of the preclinical screen detectable period) of 5, 7 and 10 years.
Also, it could be argued that the average sojourn time (the duration of the preclinical screen detectable period), and therefore lead time, is smaller than used in our estimates.
Simulation modelling is a popular tool for estimating the extent of overdiagnosis due to screening; it requires estimates of the mean duration of pre clinical cancer states (mean sojourn time), the screening test sensitivity (STS), and the background incidence of breast cancer in the absence of screening.
For the duration of this, their final match of their sojourn down under, until the lights took hold and the sky became velvet black, the clouds billowed low and gunmetal-grey over the Sydney Cricket Ground.
Essential to the concept and existence of overdiagnosis is the duration of the preclinical screen-detectable period, the sojourn time.
For example, Day and Walter (1984) used screening results of breast cancer to simultaneously estimate false negative cases (cases missed at screen) and the mean sojourn time (the average duration of the screen-detectable phase (PCDP), abbreviated as MST hereafter) based on prevalent screen-detected cases and interval cases (clinical cases occurring between screens) [ 5].
