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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.