.Assessment methods now utilize techniques that allow for better diagnostic precision of concurrent physical conditions and also provide verification of sexual responses linked to sexual symptoms" (Aubin, and Heiman 488)
Among other findings this book refers to the link between diseases such as Alzheimer's disease and dementia in elderly men and sexual dysfunction. (Evans and Garner 224) Another useful study in this regard is a Study of Sexuality and Health Among Older Adults in the United States (2007)
.Because various methodologies have yielded varying rates among the population, the actual prevalence rate of sexual dysfunctions and difficulties in the general population is not clearly known" (Johnson, Phelps, and Cottler)
sexual dysfunction nomenclature in the Diagnostic and Statistical Manual (DSM) of the American Psychiatric Association as it applies to women." (Tiefer) She sees the focus on genital-performance as a "reductionist" view