Because FoodNet conducts surveillance at 10 sites (6 ), we estimated the number of laboratory-confirmed illnesses in the United States by applying incidence from FoodNet to the estimated US population for 2006 (7 ).
Standardised incidence ratios (SIRs) were calculated as the ratio of the observed (O) to expected numbers of cases, the latter being obtained by applying incidence rates for men and women with occupation in either the 1960 or 1970 census, or with the same occupation in two consecutive censuses (1960 and 1970), or the same occupation in the three consecutive censuses (1960 , 1970 and 1980.
An apparently complex epidemiologic pattern emerged from the diathesis-stress interaction when thresholds were applied: incidence was time dependent, recurrence depended on the number of past episodes, baseline symptoms were associated with an increased risk of subsequent episodes and the remission rate declined with increasing episode duration.
To apply the incidence method, the estimated cost to manage each toxic event was multiplied with the incidence rates estimated from the statistical analysis.
Here we develop methods that apply the Incidence Function Model (IFM) in real urban planning contexts, by generating repeatable and comparable quantitative measures of ecological impacts.
Many of the survey design, data collection, and sampling issues related to prevalence estimates also apply to incidence estimates.
To minimize this bias, the FRR should be estimated in a population that is representative of the one in which the incidence assay will be applied for incidence estimation.
Brookmeyer used incidence rates from several published studies, whereas the CHAP investigators applied the incidence rates observed in their own cohort.
We applied previous incidence data from a comparable group of people with chronic epilepsy, reporting a SUDEP incidence of 5.9/1000 patient-years (Nashef et al., 1995), to the number of years that our cohort of epilepsy control subjects have already lived with epilepsy (summed minimum epilepsy duration = 2563 years).
There was no correlation between level of Ca applied and incidence of tipburn.
