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Table 1 Baseline characteristics of patients by randomisation arm

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

Characteristic   Lottery Control
Age (years) mean (sd) 48.5 (18.8) 48.4 (18.8)
  range 18–100 18–98
  n 4323 4316
Sex (male) % 47.8 48.2
  n 4325 4320
Townsend score* mean (sd) 1.06 (3.6) 1.06 (3.7)
  median (IQR) 1.9 (-2.25 to 4.3) 1.9 (-2.11 to 4.3)
  n 4199 4189
  1. Townsend scores are calculated at enumeration district level and standardised to England and Wales (Range -7.6 to 11.8). Positive scores indicate greater deprivation than the national average.
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