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Table 4 Response rates to pilot surveys 1 and 2 by maternal sociodemographic characteristics

From: Methods to increase response rates to a population-based maternity survey: a comparison of two pilot studies

  Pilot 1 (N = 287) Pilot 2 (N = 662) % difference 95% CI for % difference
n^ %+ n^ %+   
Age (years)
 16–24 28 18.4 57 18.0 −0.4 − 6.7, 8.3
 25–29 69 25.7 159 28.4 +2.7 −3.9, 8.9
 30–34 95 28.3 252 39.5 +11.2 4.9, 17.2
 > = 35 95 38.9 194 44.1 +5.2 −2.5, 12.7
Marital status
 Married 175 33.4 452 42.3 +8.9 3.8, 13.8
 Joint registration (same address) 90 26.7 166 27.3 +0.6 −5.4, 6.4
 Joint registration (different address) 15 15.5 32 17.1 +1.6 −8.1, 10.0
 Sole registration 7 16.7 12 13.2 −3.5 −8.4, 18.5
Country of birth
 UK 228 32.2 500 36.7 +4.5 0.2, 8.7
 Not UK 59 20.3 162 27.5 +7.2 1.1, 12.8
Index of multiple deprivation (IMD)
 1st (most deprived) 40 16.0 104 21.1 +5.1 −1.0, 10.6
 2nd 59 24.6 130 29.2 +4.6 −2.5, 11.3
 3rd 66 31.6 125 34.0 +2.4 −5.7, 10.1
 4th 61 40.4 147 43.6 +3.2 −6.3, 12.4
 5th (least deprived) 61 40.7 156 50.3 +9.6 −0.1, 18.9
Region
 North East 17 34.7 27 32.5 −2.2 −13.7, 18.9
 North West 35 25.4 85 32.1 +6.7 −2.8, 15.5
 Yorkshire & the Humber 23 21.9 65 32.5 +10.6 −0.1, 20.2
 East Midlands 22 25.9 48 30.0 +4.1 −8.0, 15.2
 West Midlands 29 27.1 74 34.4 +7.3 −3.6, 17.3
 East of England 39 34.5 83 37.2 +2.7 −8.3, 13.1
 London 51 25.8 104 28.3 +2.5 −5.3, 9.9
 South East 51 36.2 122 40.4 +4.2 −5.6, 13.5
 South West 20 31.3 54 39.1 +7.8 −6.6, 20.8
  1. ^ Number of responses
  2. +Response rate within subcategory