The comparison of dental hard tissue microstructure of archaeological and modern teeth has not shown any difference that could explain the different prevalence rates [ 99].
Sensitivity and specificity, and hence likelihood ratios, may differ in a population with different prevalence rates, such as gymnasts or other athletes, patients with spondylolysis, or surgical candidates [ 34].
These differences may well account for the different prevalence rates reported.
We evaluated guidelines and protocols for two cancers with different prevalence rates; breast cancer is the most prevalent cancer globally and sarcoma has prevalence rates of less than 1% (Parkin et al, 2005).
A substance use disorder (SUD) screening instrument that shows higher scale scores for one ethnic group than another is not biased if the two groups show different prevalence rates and classification accuracy does not differ for the groups (cf. [ 11, 12]).
By doing so, we account for different prevalence rates of specific physical and mental conditions, gender differences and time effects.
This difference highlights the fact that self-report tests and psychiatric interviews yield different prevalence rates as stated in the "Introduction" of this paper.
Nevertheless, in the comparison between studies, we should also bear in mind the differences in the definition of herbal medicinal product, which may lead to different prevalence rates.
The different prevalence rates reported in the literature can be partly explained by differences in study design, lack of standardized diagnostics and regional differences (ethnicity, rurality, climatic influences, etc).
In this case, different prevalence rates of documented comorbidity reflect a really existing – and medically reasonable – difference regarding the occurrence of a comorbid condition.
Existing studies on breakthrough pain (BP) have reported different prevalence rates because of different settings, populations, and assessment methods.
