List of metropolitan areas by population. One concept which measures the world's largest cities is that of the metropolitan area, which is based on the concept of a labor market area and is typically defined as an employment core (an area with a high density of available jobs) and the surrounding areas that have strong commuting ties to the core.
Average Costs. In treatment year 1, the average costs per patient diagnosed with PTSD ($8,300), TBI ($11,700), or both ($13,800) were much higher than the average costs for those with neither PTSD nor TBI ($2,400) (see Table 2 and Figure 3 on page 20).
The cost varies, depending on such factors as (1) the extent of the illness (e.g., mild or chronic); (2) the type of treatment (e.g., cognitive behavioral therapy or medication); and (3) how long treatment lasts. The length of treatment will depend on several factors, including the severity of the illness. PTSD treatment can last three to six months for some people and up to two years or longer for people with other mental health problems, according to the National Center for Posttraumatic Stress Disorder.