Final answer:
The prevalence of Somatic Symptom Disorder (SSD) where it is more common in females than males is typically observed during adulthood. SSD causes an excessive focus on physical symptoms, and research has shown that women are affected more frequently.
Step-by-step explanation:
The prevalence of Somatic Symptom Disorder (SSD) where females are more affected than males is more common in adulthood. Somatic Symptom Disorder is a form of mental illness that causes excessive and disproportionate concerns about physical symptoms leading to significant distress and impairment. Numerous studies have found that SSD and other related disorders tend to manifest more frequently in women, particularly during their adult years. This is supported by research that has looked into the epidemiology of disorders across different age groups and gender demographics, such as the work of Kessler et al., which has helped to identify patterns in the prevalence of various mental health conditions.