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Table 3 Final linear regression model on factors related to the number of of well baby visits received by age three years for Medicaid-enrolled infants

From: An explanatory model of factors related to well baby visits by age three years for Medicaid-enrolled infants: a retrospective cohort study

Variable

Beta coefficient

Standard error

95% CI

P-value

Infant variables

    

  Had a chronic health condition in the first 16 months of life

   

P < .0001

   No

ref

-

-

   Yes

0.51

0.06

0.40, 0.62

  Eligible for Medicaid through the Supplemental Security Income (SSI) Program

   

P = .001

   No

ref

-

-

   Yes

−0.70

0.22

−1.13, −0.28

Maternal variables

    

  Age (years)

    

   <18

ref

-

-

-

   18 to 20

−0.17

0.10

−0.35, 0.22

P = .084

   21 to 29

−0.27

0.09

−0.45, −0.09

P = .004

   ≥30

−0.35

0.12

−0.58, −0.12

P = .003

  Race

   

P = .792

   White

ref

-

-

   Non-White

−0.02

0.08

−0.18, 0.13

  Education

   

P = .005

   Less than high school

ref

-

-

   High school or more

−0.18

0.07

−0.31, −0.06

  Marital status

   

P = .002

   Married

ref

-

-

   Other

0.20

0.06

0.08, 0.33

  Prenatal visit quartiles (number of prenatal visits)

    

   1st quartile (less than 10 visits)

ref

-

-

-

   2nd quartile (10 to 11 visits)

0.24

0.08

0.09, 0.39

P < .001

   3rd quartile (12 to 13 visits)

0.23

0.08

0.06, 0.38

P = .002

   4th quartile (14 or more visits)

0.28

0.08

0.13, 0.43

P = .001

  Self-reported maternal alcohol use during pregnancy

   

P = .081

   No

ref

-

-

   Yes

0.26

0.15

−0.03, 0.54

  Self-reported maternal smoking status during pregnancy

   

P = .018

   No

ref

-

-

   Yes

−0.13

0.06

−0.25, −0.02

Health system variables

    

  Rurality

    

   Rural

ref

-

-

-

   Urban non-adjacent to metropolitan

0.04

0.07

−0.10, 0.17

P = .575

   Urban adjacent to metropolitan

0.05

0.07

−0.09, 0.18

P = .506

   Metropolitan

−0.03

0.12

−0.26, 0.21

P = .834

  Enrollment in a health maintenance organization (HMO) plan

   

P < .0001

   No

ref

-

-

   Yes

−1.15

0.07

−1.28, −1.01

  Recipient of MediPASS primary care case management services

   

P < .0001

   No

ref

-

-

   Yes

0.48

0.07

0.34, 0.63

  Multiplicative interaction term between HMO and MediPASS variables

0.66

0.27

0.13, 1.18

P = .015