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Table 5 Regression analysis for the two part model of log costs: Regression coefficients and t statistics

From: Medicaid managed care: how to target efforts to reduce costs

 

Adults and children combined

p

Adults

p

Child

p

Comorbidity

0.13

<.01

0.13

<.01

0.15

<.01

 

(16.66)

 

(14.89)

 

(6.68)

 

Age

0.00286

<.01

0.00059

 

-0.00466

 
 

(5.62)

 

(0.52)

 

(1.76)

 

Female

0.00

 

0.04

 

-0.05

 
 

(0.00)

 

(1.22)

 

(1.91)

 

Mental illness

0.19

 

0.16

 

0.32

 
 

(4.19)

<.01

(3.09)

<.01

(2.98)

<.01

Addiction

0.15

 

0.13

 

0.42

 
 

(2.46)

<.05

(1.91)

 

(2.13)

<.05

Pregnancy

1.02

 

0.95

 

1.48

 
 

(17.28)

<.01

(14.49)

<.01

(4.93)

<.01

Intercept

2.23

 

2.33

 

2.29

 
 

(120.44)

<.01

(40.47)

<.01

(83.58)

<.01

R 2

0.21

 

0.20

 

0.06

 

N

3,427

 

1,881

 

1,546

 
  1. Observed log10 Total Cost regression coefficients from a two part regression model (equations (1) and (2) in the Appendix). The coefficients for the zero inflation part of the two part model are not displayed. T-statistics are in parentheses.