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Table 2 Results of regression analyses assessing the impact of the job aid intervention on the five primary outcome indicators for analysis and use of vaccine-preventable disease data

From: Health system barriers to strengthening vaccine-preventable disease surveillance and response in the context of decentralization: evidence from Georgia

Outcome indicator

Mean values from Likert scale

Regression results

n = 87 observations

Intervention group

Pre-test

Post-test

Model*

Interaction coefficient

Standard error

P-value

1. Perceptions of availability of quality VPD data

Intervention

2.75

3.28

Linear regression

0.6533

0.4722

0.1664

 

Control

3.00

3.18

    

2. Perceived capability to perform analysis of VPD data

Intervention

3.40

3.90

Linear regression

1.1191

0.3110

0.0003

 

Control

4.50

3.80

    

3. Likert scale question measuring motivation to carry out analysis

Intervention

3.16

3.57

Multinomial regression

-2.4354

1.2843

0.0579

 

Control

4.09

3.50

    

4. Perceived value of using analyzed VPD data for decision-making

Intervention

4.08

4.09

Linear regression

0.2824

0.2205

0.2004

 

Control

4.56

4.38

    

5. Likert scale question measuring perceived motivation to use surveillance data

Intervention

3.81

3.92

Multinomial regression

-1.4828

1.4084

0.2924

 

Control

4.18

3.60

    
  1. VPD = Vaccine preventable disease
  2. *Regression models included: intervention group, subject, survey round, intervention group*survey round interaction term, and controlled for sex, age, years of experience and rayon. Linear and multinomial regression performed using generalized linear model in SAS (Proc Genmod), with generalized estimating equation (GEE) used to account for correlations between subjects with repeated measures.
  3. Impact of intervention assessed by intervention group*survey round interaction term.