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Table 1 Characteristics of high- and low-risk women stratified by model of antenatal care

From: Antenatal care packages with reduced visits and perinatal mortality: a secondary analysis of the WHO Antenatal Care Trial

Characteristics High-risk women N = 6,160 Low-risk women N = 18,365
New model Standard model New model Standard model
N = 3,287 N = 2,873 N = 9,281 N = 9,084
Demographics     
Married or stable union 2,981 (90.8) 2,544 (89.1) 8,628 (93.0) 8.297 (91.4)
Education less than primary 720 (21.9) 591 (20.6) 1,484 (16.0) 1,291 (14.2)
Smoking during pregnancy 493 (15.0) 460 (16.0) 815 (8.8) 1,035 (11.4)
Substance abuse 64 (2.0) 41 (1.4) - -
Ratio persons per room in house (mean, SD) 2.5 (1.4) 2.4 (1.3) 2.4 (1.3) 2.4 (1.2)
Maternal age in years (mean, SD) 26.8 (7.0) 26.7 (7.1) 25.1 (5.5) 24.7 (5.5)
Outcome of previous pregnancy     
Abortion 887 (27.0) 716 (24.9) 1,794 (19.3) 1,838 (20.2)
Fetal death 87 (2.7) 68 (2.4) 5 (0.05) 6 (0.07)
Low birth weight (<2500 g) 374 (11.4) 384 (13.4) - -
Neonatal death 61 (1.9) 45 (1.6) 5 (0.05) 2 (0.02)
Hospital admission for hypertension or pre-eclampsia/eclampsia 215 (6.5) 132 (4.6) - -
Reproductive History     
Any previous low birth weight baby 534 (16.3) 537 (18.7) 181 (2.0) 165 (1.8)
Any previous surgery of reproductive tract 227 (6.9) 351 (12.2) - -
Any previous abortion 1,443 (50.4) 1,208 (48.9) 2,594 (36.8) 2,601 (38.8)
Any previous fetal death or neonatal loss 563 (19.7) 464 (18.8) - -
Present pregnancy     
Isoimmunization Rh -ve 143 (4.4) 76 (2.7) - -
Vaginal bleeding first trimester 445 (13.5) 333 (11.6) - -
Date of LMP unknown 208 (6.3) 153 (5.3) 433 (4.7) 385 (4.2)
Nulliparous 973 (29.8) 903 (31.4) 2,739 (29.5) 2,755 (30.3)
Primigravida 491 (14.9) 463 (16.1) 2,891 (30.4) 2,890 (31.8)
Maternal height in cm 157.2 (6.8) 156.6 (6.6) 156.7 (5.5) 156.4 (6.5)
Maternal weight at first visit in kg 61.4 (13.7) 61.1 (13.2) 58.7 (12.1) 58.3 (11.8)
Duration of gestation at first visit, in weeks 15.6 (8.0) 15.7 (7.8) 16.8 (8.6) 16.1 (8.0)
Late booking for antenatal care (>28 weeks) 368 (11.2) 294 (10.2) 1,285 (13.9) 1.052 (11.6)