Describe symptoms and prevalence of two disorders (anxiety, affective, or eating disorders)

 

 

Prevalence is a statistical concept in medicine (or psychiatry). It refers to the percentage of individuals within a population who are affected by a specific disorder either currently or during their lifetime. Prevalence rates change cross-culturally and between genders.

 

Affective disorder: major depression

 

Symptoms

 

Typical symptoms of major depression (depressive episodes without mania) according to the DSM-V include

 

Prevalence

 

 

Eating disorder: bulima nervosa

 

Symptoms

 

Typical symptoms of bulimia according to the DSM-IV-TR include:

 

 

Prevalence

 

 

Keel and Klump (2003) performed a meta-analysis of research on bulimia nervosa and found an increase in people diagnosed with bulimia from 1970 to 1993. There are no incidence data for bulimia prior to 1970. The diagnostic criteria for bulimia have become more stringent over the years and this has resulted in the increase of incidences. According to the researchers, self-report surveys tend to produce higher estimates of bulimia nervosa prevalence than structured clinical interviews.