Objective: To investigate the incidence of pregnancy induced hypertension (PIH) in Shanghai during 1989-1998.
Methods: The data were analyzed retrospectively from three municipal general hospitals and five special hospitals obstetrics and gynecology.
Results: There were 158,790 deliveries in ten years. The total numbers of PIH were 8,852 cases. The incidence of PIH was 5.57%. The rate of mild, moderate and severe PIH was 55.83%, 29.39%, and 14.78% respectively. There were 114 cases (1.29%) complicated with eclampsia. The rate of cesarean section was 66.97% in PIH patients. The complications of PIH were as following: abruptio of Placenta 0.52%, heart failure 0.34%, renal failure 0.20%, DIC 0.07% hemolysis, elevated liver enzymes and low platelet count(HELLP) syndrome 0.03%, maternal death one case. There were 9,197 birth of 8,852 cases of PIH (twin 343 cases, triplets one cases). The perinatal death 66 occurred in cases (7.18@1000) in which fetal death 48 cases, stillbirth 12 and neonatal death 6.
Conclusion: The incidence of PIH and the rate of perinatal infant death can be reduced by strengthen antenatal monitoring, prevention, early diagnosis and treatment of PIH.