Little attention has been given to the issue of the age of onset of dental anxiety, even though it may have a bearing on the origins of this type of fear. This study aimed to identify the age of onset of dental anxiety and to identify differences by age of onset with respect to potential etiological factors, such as negative dental experiences, family history of dental anxiety, and general psyc...

INFORMATION concerning the age distribution of the onset of esotropia is important in several respects, especially in discussing the aetiology of strabismus. Previously, the age distribution was considered to support the refraction theory and later the fusion theory, but more recently it has been considered to support the reflex theory. The child's age at the onset of the strabismus must be tak...

The age at which retinopathy of prematurity was first seen was determined in 143 infants. In all, the initial ophthalmological examination was normal. Birth weights varied from 630 to 2700 g and gestational ages from 24.5 to 40.0 weeks. The median postnatal age at which acute retinopathy of prematurity was first seen was 51 and 40 days for those less than 28 and greater than or equal to 28 week...

OBJECTIVE To calculate age at onset curves of retinitis pigmentosa (RP) to resolve the difficulty in calculating the recurrence risk in a family. Retinitis pigmentosa is a common hereditary retinal disease that leads to blindness. It is a slow-onset disease, and family members of patients sometimes develop RP later. METHODS We studied 370 patients with typical RP. The age at onset was defined...

OBJECTIVE To explore clinical phenotype and characteristics of Parkinson disease (PD) at different ages at onset in recently diagnosed patients with untreated PD. METHODS We have analyzed baseline data from the Parkinson's Progression Markers Initiative database. Four hundred twenty-two patients with a diagnosis of PD confirmed by DaTSCAN imaging were divided into 4 groups according to age at...