We calculated the denominator (size of the eligible population) as an average of the 3 years within the time period.
As diagnosed pre-existing diabetes rises, the methodology used to calculate GDM prevalence may influence the estimates due to differing denominator sizes, particularly among ethnic groups and in settings where pre-existing diabetes prevalence is high.
The reason, however, is opposite: this fraction is low not because the denominator, the size of the memory, is large, but because the numerator, the extent of replication, is small.
But ask what has had more effect on working life - the innovation of companies like Lloyds TSB, moving way ahead of government legislation or a box-ticking, lowest common denominator, one-size-fits-all piece of regulation?
Moreover, referral rates are calculated with different denominators, population (list size) or consultations.
Smoothing methods need to consider and adjust for differences in the population size (denominator) for different geographic units.
Adjustments will be made to the denominator (practice list size) of the GP presentation rates to adjust for list inflation.
Figure 1 displays how the bootstrap standard error of RVs varied independently by sample size, denominator F-statistic, and correlation between the comparator and reference measures.
Simulations examined the effects of sample size, denominator F-statistic, correlation between comparator and reference measures, and number of bootstrap replicates.
The median match size (denominator) used to compute the pretest probability from the attribute matching method was 192 patients (1st 3rd quartiles: 94 to 340), and 6,104 of the 7,059 877%) pretest probability estimates had a match size ≥ 50 patients.
