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Table 3 Factors related to response.

From: A randomised controlled trial to determine the effect on response of including a lottery incentive in health surveys [ISRCTN32203485]

Variable β (SE) P value Odds ratio (95% confidence interval)
Intercept -0.36 (0.06) <0.0001 -
Age (per increase of 1 year) 0.02 (0.001) <0.0001 1.02 (1.02, 1.02)
Male -0.64 (0.05) <0.0001 0.53 (0.48, 0.58)
Townsend score (per increase of 1 unit) -0.07 (0.01) <0.0001 0.93 (0.92, 0.95)
Practice 3 -0.22 (0.07) <0.0001 0.80 (0.69, 0.92)
Practice 6 -0.90 (0.09) <0.0001 0.41 (0.34, 0.48)
Practice 7 -0.67 (0.07) <0.0001 0.51 (0.45, 0.59)
  1. Variables considered were randomisation arm, age, sex, Townsend score, practice and 2 way interactions with randomisation arm.