Still, CDC used this prevalence data, combined with cases of AIDS (which had been reported since 1982), to estimate incidence.
We used this prevalence to estimate the number of women with fistula in WBG and in the country.
Because such a rate existed in literature, we preferred to use this prevalence rate representing the initial outcome of sexual contact with an HBsAg positive spouse after marriage.
Third, it was not possible to determine how much of the variation is attributable to specific risk factors, and the prevalence of some of the defects is influenced by the sources of prenatal diagnoses used; this prevalence varies across hospitals and provinces in Ecuador.
Using this disease prevalence of 20% and an expected level of sensitivity of the AARR in screening for PA of 95% [ 3, 22] with a confidence interval of 5% we calculated a required study sample size of 365 study participants.
Using this assay, the prevalence of FXS was 0.93 % in Chinese children with unknown IDD.
Using this framework, the prevalence of dietary inadequacy can be estimated for most nutrients as the proportion of a population's usual nutrient intake distribution that falls below the estimated average requirement (EAR).
Using this definition, the prevalence of diabetes increased between 1988–1994 and 1999 2004 from 16.0 to 19.1% among those with CKD and from 4.9 to 6.2% among adults without CKD.
It is well documented that Asians have an ethnic predisposition to adverse body fat distribution and metabolic syndrome (1); hence, optimal cutoff points for waist circumference have been established for South Asians (9); by using this cutoff, the prevalence of the metabolic syndrome in this population is estimated to be 10 30% (15).
Although at first glance centenarians seem a good model to study determinants of longevity in humans, there are several limitations of using this approach: low prevalence (1 centenarian per 5-10.000 inhabitants), presence of frailty due to extreme age and lack of a control group of the same age [ 29, 30].
