physical and mental health status, and comorbid conditions), a log-linear multiple

regression was conducted. A significant negative relationship between the presence of

anxiety and medical expenditures only was found (t = -1.91, p = 0.03), whereas the

presence of depression yielded a non-significant relationship to medical expenditures

only (t = -.56, p = .29). That is, medical expenditures for the group with comorbid

anxiety was $3,331.77 less than the group without anxiety (see Table 3-8). Although not

statistically significant, the medical expenditures for the group with comorbid depression

was $3,123 less than the group without comorbid depression.

Depression Treatment and Expenditures

 Participant characteristics. The sample used to determine the relationship

between treatment of depression and health care expenditures was 649 respondents with a

pulmonary condition and depression. In the sample, 100 respondents received mental

health treatment (see Table 3-4 for sample characteristics).

 Results. To determine the relationship between depression treatment and total

health care expenditures after adjusting for demographics (age, sex, race/ethnicity),

socioeconomic status (years of education and income), insurance status, illness severity

(perceived physical and mental health status, and comorbid conditions), and anxiety

treatment, a log-linear multiple regression was conducted. The relationship between

depression treatment and total health care expenditures was non-significant (t = .54, p =

.30) (see Table 3-7). The group who received depression treatment cost $13,752,

whereas the group who had not received depression treatment cost $5,413.

 To determine the relationship between depression treatment and medical

expenditures only after adjusting for demographics (age, sex, race/ethnicity),

socioeconomic status (years of education and income), insurance status, illness severity