Total Cost First Post-Treatment Year

Duration of Drug Therapy

Model

Model Specification

OLS

(SE)

R-squared

In OLS

OLS

(SE)

R-squared

In OLS

1

Demographic variables

1140^***

(185.1)

0.161

95.9^***

(2.8)

0.032

2

Demo + Medical Diagnosis

1487^***

(179.7)

0.219

93.0^***

(2.8)

0.045

3

Demo + MedicalDx + MHDx

1454^***

(178.2)

0.236

93.4^***

(2.8)

0.061

4

+prior hospitalization

+prior long term care

1128^***

(131.2)

0.586

92.2^***

(2.8)

0.069

5

+prior and switch total costs/prior episode duration

1179^***

(117.6)

0.667

88.6^***

(2.85)

0.075

6

Model 6 Specification Using Data for All Episodes

751^***

(37.8)

0.712

55.0^***

(0.8)

0.157

7

Add: prior episode count

1217^***

(121.9)

0.671

86.6^***

(2.9)

0.076

8

Add: mono/poly

1231^***

(123.5)

0.671

84.0^***

(2.9)

0.076

9

Add: prior depot use indicator

1287^***

(126.7)

0.671

84.2^***

(2.9)

0.076

10

Add: time off Rx

1283^***

(127)

0.671

84.3^***

(2.9)

0.076

11

Add: prior Rx mix

1120^***

(137.1)

0.672

91.7^***

(3.1)

0.077