Mental Health Study Example Alachua County, Florida

1. Mental Health Study ExampleAlachua County, Florida Purpose: Relate mental impairment to two explanatory variables, the severity of life and socioeconomic status

2. The Dataset Subject: a randomly assigned id number (1, 2, 3,…) Mental impairment: ordinal response with categories well, mild symptom formation, moderate symptom formation, and impaired Life events: a composite measure of the number and severity of important life events such as birth of a child, new job, divorce in the family that occurred to the subject within the past three years (0, 1,…,9) Socioeconomic status (SES): measured here as binary (1 = high and 2 = low)

3. The Main Effects Model Proportional odds model J = 4 response categories (well, mild, moderate, impaired) x1 = life events (0,1,2,…,9) x2 = SES (1 = low, 2 = high)

4. SAS Code & Output

5. What does this mean? and The cumulative probability of starting at the well end of the scale decreases (b1) as the life events score increases and also increases at the higher level of SES (b2).

6. SES Effect for x1 = 4.275, the mean life events score THIS WILL BE P(Y < 2) FORMULA

7. Life Events Effect for x2 = 1, high SES for x2 = 0, low SES