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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.