Beeckman et al. BMC Public Health 2010, 10:527 http://www.biomedcentral.com/1471-2458/10/527 Page 5 of 9 Table 1 characteristics of the study sample (N = 333) and differences in the number of antenatal visits between subgroups Study Sample N % Total number of Antenatal visits Median P25-P75 P Predisposing characteristics Age* a Marital Status b Origina Educational level a Occupational status b Enabling characteristics Equivalent incomea,d Health Insurance Coverage b Receiving welfare benefits* b Regular obstetrician b Regular General Practitioner b Pregnancy related characteristics Parity b Wanted pregnancy* b Planned pregnancy b Medical assisted pregnancy* b History of obstetric risks b,e Gestational age at initiation of care b High risk status during antenatal careb,f Continuity of Carer Index b,g Gestational age at delivery b *1 missing **2 missing NS Not Significant P25-P75 Percentile 25-Percentile 75 <= 20 21-35 >35 Co-habiting Single 15 oldest EU countriesc Maghreb and Turkey Sub-Saharan African Other Not finished secondary school Secondary school Higher education Active on labour market Not active on the labour market Low Moderate High Yes No Yes No Yes No Yes No Primiparae Multiparae Later or not Earlier or right time Yes No Yes No Yes No Before week 14 After week 14 Yes No <50% >= 50% <37 weeks >= 37 weeks 14 4.2 265 79.5 53 15.9 302 90.7 31 9.3 134 40.3 112 33.6 49 14.7 38 11.4 49 14.7 150 45.0 134 40.2 151 45.3 182 54.7 91 27.3 164 49.2 78 23.4 311 93.4 22 6.6 31 9.3 301 90.4 160 48.0 173 52.0 206 61.9 127 38.1 128 38.4 205 61.5 52 15.6 280 84.1 257 77.2 76 22.8 15 4.5 317 95.2 92 27.6 241 72.4 316 99.5 17 0.05 51 15.3 282 84.7 253 76.0 80 24.0 24 7.2 309 92.8 11 12 13 11 12 13 11 13 12 10 11 14 13 11 11 11.5 15 11 12 12 11 12 12.5 11 13 13.5 11 11.5 12 11 12 12 12 12 12 12 9 12 14 12 11 10 12 11-13 10-15 10-15 9-14 10-15 10-17 9-13 9-14 10-15 9-12 9-13 11-18 10-17 9-14 9-13 10-14 12-18 10-14 10-15 10-15 9-13 10-14 10-16 9-14 10-16 11-17 9-14 9.5-13 10-16 9-13 10-16 10-15 10-16 10-16 10-14 10-15 6-10 10-15 10-17 10-16 9-13 9-13 10-15 NS NS < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 NS NS NS 0.042 NS 0.002 NS NS 0.023 0.002 0.016 < 0.001