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Table 1 Responders to invitation letter by age, gender and Index of Multiple Deprivation (IMD)

From: Interpreting population reach of a large, successful physical activity trial delivered through primary care

  All invitees
N = 10,927
Responders to invitation
N = 4572
 
  Number (%) Number Standardised percentage response a
(95% CI)
Ratio of response rates
(95% CI)
Age
 45-54 years 5229 (47.8) 1698 33.4 (32.1, 34.7) 0.57 (0.54,0.60)
 55-64 years 3367 (30.8) 1535 46.2 (44.5, 47.9) 0.79 (0.76,0.84)
 65-75 years 2331 (21.3) 1339 57.8 (55.8, 59.8) 1.0
Gender
 Female 5604 (51.3) 2638 46.7 (45.4, 48.0) 1.0
 Male 5323 (48.7) 1934 36.8 (35.5, 38.1) 0.80 (0.76,0.84)
IMD national quintile b
 1 Most deprived 712 (6.8) 207 29.5 (26.2, 32.8) 0.55 (0.50,0.61)
 2 2768 (26.4) 995 36.1 (34.4, 37.9) 0.67 (0.63,0.72)
 3 2960 (28.2) 1242 41.2 (39.8, 43.2) 0.77 (0.73,0.82)
 4 2328 (22.2) 1060 45.6 (43.6, 47.5) 0.85 (0.80,0.90)
 5 Least deprived 1711 (16.3) 914 53.4 (51.4, 56.0) 1.0
  1. a Age percentages standardised for gender, gender percentages standardised for age, IMD percentages standardised for age and gender. Percentages are of all those invited
  2. b 448 people are missing IMD, primarily due to certain postcode areas not being included in the look-up table