The incidence-density of acute hepatitis B in the validation set closely matched the incidence-density in the final years of the derivation set.
In order to stay accurate, Google has to tweak its algorithms regularly, to match the incidence of illness in the world.
Thus, dividing the number of first events by the person-years of observation will not match the incidence rate estimates.
When compared to the directly observed virologically confirmed influenza hospitalization rates for each age group, the rate difference model failed to produce estimates that closely matched the directly observed incidence rates for the other two years (Table 1 and Figure 2).
In the propensity score matched cohort, the incidence of AKI, severe AKI, in-hospital RRT, and persistent AKI at discharge were also lower in the RPF group than in the control group.
Study subjects were matched to the incidence records using unique government-assigned identification numbers.
Another limitation of the study is that the two groups were not matched on the incidence of ST-segment elevation myocardial infarction and non-ST-segment myocardial infarction.
Age-specific forces of infection for symptomatic disease were calculated during the calibration process to match the observed incidence.
The absolute risks by level of physical activity were examined by multiplying hazard ratios by a common factor to make the inverse-variance weighted average of the hazard ratios match the annual incidence of major vascular events in this cohort.
During the selection of union patients, a quota sampling regarding open vs closed fractures (approximately 50% of each) has been performed in an effort to match the high incidence of open fractures seen in non-union patients.
The immunity induced is therefore largely serosubtype specific, and a vaccine based on such a strategy would necessarily have to be prepared from multiple strains and the composition tailored for geographical location and adjusted over time to match the changing incidence of serosubtypes [ 9].
