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Table 4 Number of questions answered

From: Improving response rate and quality of survey data with a scratch lottery ticket incentive

 

Model 1*

 

Mean (S.E)

p-value

 

Incentive group

Control group

Incentive vs control group

a) Pre-reminder

6.72 (0.033)

6.60 (0.038)

0.015

b) Total

6.70 (0.030)

6.56 (0.032)

0.001

 

Model 2**

 

Mean (S.E)

p-value

 

Incentive group

Control group

Incentive vs control group

a) Pre-reminder

6.71 (0.032)

6.60 (0.036)

0.029

b) Total

6.70 (0.029)

6.57 (0.031)

0.002

  1. GLM Univariate Analysis.
  2. * Model 1. Number of questions answered as dependent variable and respondents in the incentive group or controll group (1,0) as fixed factor.
  3. ** Model 2. The same as model 1 but with gender, age and education as covariates. Age and education are significant in both the pre-reminder and total models.
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BMC Medical Research Methodology

ISSN: 1471-2288

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