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Table 1 Socio-demographic and baseline characteristics

From: The effect of timing of incentive payments on response rates for cohort study telephone interviews in primary care setting with cost-minimization analysis, a randomized controlled trial

  Up-front payment group Delayed payment group
Mean age in years (SD) 63.9 (11.2) 63.9 (11.5)
Genders (n)
 Male (%) 105 (40.5 %) 124 (47.7 %)
 Female (%) 154 (59.5 %) 136 (52.3 %)
Employment status (n)
 Working (%) 84 (32.4 %) 95 (36.5)
 Not working (%) 175 (67.6 %) 165 (36.5)
Smoking status (n)
 Smoker (%) 53 (21.3 %) 59 (24.2 %)
 Nonsmoker (%) 196 (78.7 %) 185 (75.8)
Drinking status (n)
 Drinker (%) 108 (43.5) 128 (52.2 %)
 Nondrinker (%) 140 (56.5 %) 117 (47.8 %)
  1. Chi-squared test showed P > 0.05 for all categorical variables and t-test showed P > 0.05 for all continuous variables