Abstract
clinical obstetric information network (COIN) started in 1996 to establish large-scale database for clinical perinatal research.
1. 23 national hospitals participated in 2003: Fukuyama, Hamada, IMCJ, Kanazawa, Kobe, Kofu, Kure MC, Kyushu MC, Kyushu CVC, Mie-chuo, Mito, Nara, Nishi-saitama-chuo, Oita, Okayama MC, Osaka MC, Osaka-minami, Sagamihara, Sendai, Takasaki, Tokyo MC, Yokohama MC, Zentsuji.
2. Total number of mothers was 9, 916 cases: 977 (9.9%) preterm deliveries; 701 (7.1%) maternal transfers; 2, 723 (27.5%) postpartum hemorrhages; and blood transfusions were performed for 52 cases (0.5%). Maternal mortality rate was 9.8 (per 100, 000 live births).
3. Total number of neonates was 10, 121 cases: 1, 006 (9.9%) preterm between 28-36 weeks, and 73 (0.7%) were between 22-27 weeks. Early neonatal deaths were 13 cases; mortality rate was 1.3 (per 1, 000 live births). Fetal deaths after 22 weeks were 52 cases; rate was 5.1 (per 1, 000 total births). Perinatal mortality rate was 6.4 (per 1, 000 total births).
