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Table 2 Frequency of placenta accreta spectrum according to the number of previous cesarean sections

From: Risk factors for placenta accreta spectrum: findings from the Japan environment and Children’s study

Number of previous CSsPlacenta previa (P < 0.001*)No placenta previa (P = 0.427*)
01.3% (6/460)0.2% (172/81914)
112.2% (6/49)0.1% (7/6081)
≥227.3% (6/22)0.2% (5/2028)
  1. CS Cesarean section
  2. *, P value from the extended Mantel-Haenszel chi-square test
  3. P < 0.05 is statistically significant