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Table 2 Poisson, Over-dispersed Poisson using GEE, and Negative Binomial Models for Number of Days of VPA

From: A demonstration of modeling count data with an application to physical activity

    

Over-dispersed

   
 

Poisson Regression

Poisson

Negative Bionomial

 

Beta

SE

p-value

SE

p-value

Beta

SE

P-value

Current employment status

        

   Full-time

Reference

  

Reference

 

Reference

  

   Part-time

0.474

0.235

0.044

0.419

0.26

0.274

0.569

0.63

   Self-employed

0.595

0.274

0.030

0.512

0.25

0.177

0.716

0.81

   Homemaker/other unemployed

0.493

0.201

0.014

0.405

0.22

0.434

0.450

0.33

Years of formal education

        

   Through 6th grade

Reference

  

Reference

 

Reference

  

   Middle school

-0.006

0.249

0.98

0.431

0.99

0.356

0.527

0.50

   High school

0.349

0.237

0.14

0.471

0.46

0.236

0.536

0.66

   Any college

0.369

0.231

0.11

0.445

0.41

-0.041

0.605

0.95

Smoked cigarettes past 30 days (Y/N)

-0.398

0.217

0.066

0.361

0.27

-0.884

0.552

0.11

Body Mass Index

-0.069

0.016

<0.0001

0.025

0.006

-0.094

0.042

0.025

Marital status (Married/Not married)

-0.194

0.212

0.36

0.423

0.65

-0.416

0.477

0.38

Self-reported health (1=Excellent, 5=Poor)

-0.357

0.072

<0.0001

0.123

0.004

-0.572

0.233

0.014

Household size

0.001

0.046

0.99

0.108

0.99

-0.044

0.089

0.63

Age (5 yr interveal)

-0.019

0.040

0.64

0.089

0.84

-0.083

0.090

0.36

Acculturation score

0.267

0.086

0.002

0.128

0.037

0.556

0.271

0.040