Given the nature of study sample, incidence of recurrent stroke (approximately 2.6%/year in both groups) was roughly half of our initial assumption, but turned out to be similar to the recent report from Japan (Shinohara et al., 2010).
(This is also true for case-cohort sampling and incidence density sampling).
For each case, 16 potential controls were randomly sampled using incidence density sampling (Rothman and Greenland, 1998), with replacement, from the pool of eligible controls.
The aim of the method is to assess from the sequence of serologic samples which incidence curves are the most likely to have generated the observed sequence of seropositivity in the samples by working out their posterior distribution.
In samples, the incidence of del(17p) involved a minor (<20%) or a major (> > 50%) fraction of cells, Table 2.
This effect is relatively powerful, reducing the standard deviation of the posterior samples on incidence in 2010 from an average of 0.15 0.07% when NPBS data are not available.
Insofar as we have not detected H5 or H7 subtypes among our 8,254 samples, their incidence has been too low to effectively measure.
While poly(dimethyl siloxane), PDMS, was observed on some samples, similar incidence of PDMS contamination was observed when handling wood samples with and without exposure to the filter plate.
In their sample, HIV incidence was 8.6/100 person-years, with one-third of exclusively MSM acquiring HIV within a year of study enrolment.
Second, case-centered logistic regression is closely related to matched case-control studies with risk set sampling (also called incidence density sampling).
