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Table 1 Maternal characteristics by gestational age at booking [N = 45,992]

From: Disparities in the timing of antenatal care initiation and associated factors in an ethnically dense maternal cohort with high levels of area deprivation

Characteristics Total  ≤ 12 weeks  > 12 weeksa 13–19 weeksb 20 weeks and abovec
45,992 36,408 (79.2%) 9584 (20.8%) 5504 (12.0%) 4080 (8.8%)
Maternal ethnicity
 White British 20,029(44.0%) 16,758(83.7%) 3271(16.3%) 1834(9.2%) 1437(7.2%)
 White Other 6875(15.1%) 4996(72.7%) 1879(27.3%) 946(13.8%) 933(13.6%)
 Black Caribbean 880(1.9%) 623(70.8%) 257(29.2%) 164(18.6%) 93(10.6%)
 Black African 2490(5.5%) 1638(65.8%) 852(34.2%) 482(19.4%) 370(14.9%)
 Indian 1708(3.8%) 1387(81.2%) 321(18.8%) 172(10.1%) 149(8.7%)
 Pakistani 7698(16.9%) 6162(80.0%) 1536(20.0%) 1009(13.1%) 527(6.8%)
 Bangladeshi 3037(6.7%) 2442(80.4%) 595(19.6%) 434(14.3%) 161(5.3%)
 Any other 2772(6.1%) 2048(73.9%) 724(26.1%) 384(13.9%) 340(12.3%)
Area deprivation quintiles
 Lowest (least deprived) 4432(9.7%) 3469(78.3%) 963(21.7%) 425(9.6%) 538(12.1%)
 Second lowest 1893(4.1%) 1412(74.6%) 481(25.4%) 146(7.7%) 335(17.7%)
 Middle 7759(16.9%) 6395(82.4%) 1364(17.6%) 716(9.2%) 648(8.4%)
 Second highest 15,993(34.9%) 12,893(80.6%) 3100(19.4%) 1936(12.1%) 1164(7.3%)
 Highest (most deprived) 15,993(34.3%) 12,133(77.2%) 3585(22.8%) 2256(14.4%) 1329(8.5%)
Maternal age (years)
 ≤ 25 13,574(29.5%) 10,243(75.5%) 3331(24.5%) 1879(13.8%) 1452(10.7%)
 26–35 26,721(58.1%) 21,686(81.2%) 5035(18.8%) 2918(10.9%) 2117(7.9%)
 36 and above 5696(12.4%) 4478(78.6%) 1218(21.4%) 707(12.4%) 511(9.0%)
Maternal smoking in pregnancy
 Non-smokers 37,057(81.4%) 29,548(79.7%) 7509(20.3%) 4338(11.7%) 3171(8.6%)
 Smokers 8447(18.6%) 6570(77.8%) 1877(22.2%) 1134(13.4%) 743(8.8%)
Parity
 First born 18,551(40.3%) 14,342(77.3%) 4209(22.7%) 2025(10.9%) 2184(11.8%)
 Second 15,505(33.7%) 12,820(82.7%) 2685(17.3%) 1635(10.5%) 1050(6.8%)
 Third 7194(15.6%) 5812(80.8%) 1382(19.2%) 969(13.5%) 413(5.7%)
 Fourth or higher 4742(10.3%) 3434(72.4%) 1308(27.6%) 875(18.5%) 433(9.1%)
Marriage status
 Married/civil partners 26,465(57.5%) 21,272(58.4%) 5193(54.2%) 3048(55.4%) 2145(52.6%)
 Never married 3229(7.0%) 2154(5.9%) 1075(11.2%) 648(11.8%) 427(10.5%)
 Divorced/separated/widowed 5788(12.6%) 4548(12.5%) 1240(12.9%) 715(13.0%) 525(12.9%)
 Unknown 10,510(22.9%) 8434(23.2%) 2076(21.7%) 1093(19.8%) 983(24.1%)
Migrant status
 UK born 8996(58.5%) 7715(61.2%) 1281(46.1%) 741(46.3%) 540(45.7%)
 Non-UK born 6392(41.5%) 4892(38.8%) 1500(53.9%) 858(53.7%) 642(54.3%)
  1. aAny late antenatal care initiation
  2. bModerately late antenatal care initiation
  3. cExtremely late antenatal care initiation