Studies suggest that the prevalence of<unk>  in the elderly population is around 2–4%. Sex differences While<unk>  can occur in both men and women, it is more common in women, even after the difference has been adjusted for life expectancies. The ratio of women with<unk>  to men with<unk>  is anywhere from 3:1 to 45:2. Age It is seen mainly in patients over the age of 60, but has been known to occur in patients in their 40s and 50s. Personality type and living situation It is suggested that individuals who develop<unk>  later in life have premorbid personalities, and can be described as “quarrelsome, religious, suspicious or sensitive, unsociable and cold-hearted.” Many patients were also described as being solitary, eccentric, isolated and difficult individuals; these characteristics were also long-standing rather than introduced by the disorder. Most of the traits recognized prior to the onset of<unk>  in individuals can be grouped as either paranoid or schizoid. Patients presenting with<unk>  were most often found to be living by themselves (either single, widowed, or divorced). There have also been reports of low marriage rate among<unk> s and these individuals also have few or no children (possibly because of this premorbid personality). Physical factors The development of paranoia and hallucinations in old age have been related to both auditory and visual impairment, and individuals with<unk>  often present with one or both of these impairments. Hearing loss in<unk> s is associated with early age of onset, long duration, and profound auditory loss.
Paraphrenia
Oneirophrenia
Hapalonychia
Amastia
Dolichonychia
Steatopygia
White piedra
Platonychia