Retinitis pigmentosa (RP) causes hereditary blindness in adults (prevalence, approximately 1 in 4000).
However, due to the complexity of the breast structure, low disease prevalence (approximately 0.5%% [3]), and radiologist fatigue, abnormalities are often ignored.
In terms of prevalence, approximately half of cases of HY were one or another of the causes of headache on ≥15 days/month and a quarter were each of migraine and TTH.
Prevalence approximately equals the incidence rate times the average duration of disease [ 20].
For example, Crohn's disease has a population prevalence approximately equal to that of congenital heart disease.
BHR prevalence was identical in both genders, as was symptom prevalence (approximately 10% for rhinoconjunctivitis-like symptoms and 6% for asthma-like symptoms).
20 Although patients with ATS have a high prevalence (approximately 64%) of ventricular arrhythmias, 16, 17 these arrhythmias are usually not related to exercise and/or emotional distress.
The prevalence of PFPS has been reported across several age groups, with females having a prevalence approximately 1.5-3 times higher than males in athletic populations [ 6, 7].
