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Table 2 Baseline sociodemographic characteristics for pilot survey samples

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

  Pilot 1 Pilot 2 p-value
N = 1000 N = 2000  
Maternal data n % n %  
Age (years)a 0.49
 16–24 152 15.2 317 16.2  
 25–29 268 26.8 559 28.6  
 30–34 336 33.6 638 32.7  
 35+ 244 24.4 440 22.5  
Marital status at registrationa 0.49
 Married 524 52.4 1069 54.7  
 Joint registration (same address) 337 33.7 607 31.1  
 Joint registration (different address) 97 9.7 187 9.6  
 Sole registration 42 4.2 91 4.7  
Country of birtha 0.54
 UK 709 70.9 1364 69.8  
 Outside UK 291 29.1 590 30.2  
Index of multiple deprivation (IMD)a 0.40
 1st (most deprived) 250 25.0 494 25.3  
 2nd 240 24.0 445 22.8  
 3rd 209 20.9 368 18.8  
 4th 151 15.1 337 17.2  
 5th (least deprived) 150 15.0 310 15.9  
Regiona 0.99
 North East 49 4.9 83 4.2  
 North West 138 13.8 265 13.6  
 Yorkshire & the Humber 105 10.5 200 10.2  
 East Midlands 85 8.5 160 8.2  
 West Midlands 107 10.7 215 11.0  
 East of England 113 11.3 223 11.4  
 London 198 19.8 368 18.8  
 South East 141 14.1 302 15.5  
 South West 64 6.4 138 7.1  
  1. aSociodemographic data available for 1954 women from pilot survey 2 sample