Table 3

Labour, birth and maternal morbidity among cases with suspected and unsuspected placenta accreta prior to delivery and controls

CaseControl (n=570)p Value*
PA suspected antenatally
(n=169)
PA not suspected antenatally
(n=123)
Total† (n=295)
N (%)N (%)N (%)N (%)
Did the woman labour
  Yes7 (4.1)51 (41.5)59 (20.0)451 (79.1)<0.001
  No162 (95.9)72 (58.5)236 (80.0)117 (20.5)
  Not stated0 (0.0)0 (0.0)0 (0.0)2 (0.4)
Induced labour
  Yes1 (14.3)16 (31.4)17 (28.8)116 (25.7)0.55
  No5 (71.4)34 (66.7)40 (67.8)329 (72.9)
  Not stated1 (14.3)1 (2.0)2 (3.4)6 (1.3)
Gestation at birth, weeks, median35.038.036.039.0<0.001
Method of birth
  Unassisted vaginal birth1 (0.6)30 (24.4)31 (10.5)314 (55.1)<0.001
  Instrumental vaginal birth0 (0.0)5 (4.1)5 (1.7)71 (12.5)
  Planned caesarean birth140 (82.8)50 (40.7)190 (64.4)107 (18.8)
  Unplanned caesarean birth28 (16.6)38 (30.9)69 (23.4)77 (13.5)
  Not stated0 (0.0)0 (0.0)0 (0.0)1 (0.2)
Admission to ICU
  Yes65 (38.5)40 (32.5)105 (35.6)6 (1.1)<0.001
  No104 (61.5)81 (65.9)188 (63.7)564 (98.9)
  Not stated0 (0.0)2 (1.6)2 (0.7)0 (0.0)
Admission to HDU
  Yes68 (40.2)32 (26.0)101 (34.2)8 (1.4)<0.001
  No100 (59.2)89 (72.4)191 (64.7)562 (98.6)
  Not stated1 (0.6)2 (1.6)3 (1.0)0 (0.0)
Had hysterectomy
  Yes142 (84.0)53 (43.1)196 (66.4)2 (0.4)<0.001
  No27 (16.0)69 (56.1)98 (33.2)568 (99.6)
  Not stated0 (0.0)1 (0.8)1 (0.3)0 (0.0)
Maternal death
  Yes1 (0.6)1 (0.8)2 (0.7)0 (0.0)0.12
  No168 (99.4)122 (99.2)293 (99.3)570 (100.0)
  • *Total number of cases versus control.

  • †Includes three cases where it was not known whether PA was suspected prior to birth.

  • ICU, intensive care unit; HDU, high dependency unit; PA, placenta accreta.