Research Article
Factors Associated with the Recent Increasing Cesarean Delivery Rate at a Japanese Perinatal Center
Table 1
Demographic and obstetric characteristics in singleton pregnancies delivered at ≥22-week gestation.
| | Year | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | Total | | N | 1733 | 1747 | 1912 | 1873 | 1873 | 1903 | 1960 | 1957 | 1987 | 1817 | 1752 | 20514 | | Nulliparity | 929 (53.6) | 953 (54.6) | 1002 (52.4) | 934 (47.9) | 933 (49.8) | 960 (50.4) | 959 (48.9) | 973 (49.7) | 990 (49.8) | 877 (48.3) | 893 (51.0) | 10403 (50.7) | | Maternal age ≥ 35 years | 349 (20.1) | 353 (20.2) | 492 (25.7) | 501 (26.7) | 562 (30.0)* | 553 (29.1)* | 682 (34.8)* | 686 (35.1)* | 731 (36.8)* | 676 (37.2)* | 624 (35.0)* | 6209 (30.3) | | Pregnancy-induced hypertension | 90 (5.2) | 94 (5.4) | 99 (5.2) | 106 (5.7) | 106 (5.7) | 92 (4.8) | 91 (4.6) | 105 (5.4) | 95 (4.8) | 91 (5.0) | 115 (6.6) | 1084 (5.3) | | Previous Cesarean deliveries | 147 (8.5) | 151 (8.6) | 154 (8.1) | 195 (10.4) | 152 (8.1) | 178 (9.4) | 197 (10.1) | 206 (10.5) | 224 (11.3) | 210 (11.6) | 190 (10.8) | 2213 (0.9) | | Breech presentation | 42 (2.4) | 44 (2.5) | 46 (2.4) | 47 (2.5) | 46 (2.5) | 44 (2.3) | 45 (2.3) | 38 (1.9) | 38 (1.9) | 36 (2.0) | 37 (2.1) | 463 (2.3) | | Preterm delivery | 162 (93) | 141 (8.1) | 181 (9.5) | 199 (10.6) | 165 (8.8) | 164 (8.6) | 172 (8.8) | 170 (8.7) | 193 (9.7) | 177 (9.7) | 181 (10.3) | 1905 (9.3) | | Neonatal birth weight < 2500 g | 226 (13.0) | 239 (13.7) | 285 (14.9) | 288 (15.4) | 271 (14.5) | 236 (12.4) | 280 (14.3) | 256 (13.1) | 290 (14.6) | 271 (14.9) | 270 (15.4) | 2912 (14.2) | | Neonatal birth weight ≥ 4000 g | 23 (1.3) | 27 (1.5) | 25 (1.3) | 20 (1.1) | 16 (0.9) | 20 (1.1) | 11 (0.6) | 11 (0.6) | 20 (1.0) | 15 (0.8) | 11 (0.6) | 199 (1.0) |
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Data are presented as numbers (percentage).
P < 0.05 versus 2002.
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