Christianson R E
Am J Obstet Gynecol. 1976 Jun 15;125(4):509-13. doi: 10.1016/0002-9378(76)90367-7.
Routine prenatal visit blood pressure measurements were used to examine the differences in blood pressure by age and parity in a cohort of 6,662 white gravidas. Both age and parity were observed to have significant effects on blood pressure during pregnancy. For a given age, nulliparas were observed to have higher mean blood pressures than parous gravidas, irrespective of the inclusion or exclusion of gravidas who were diagnosed to have hypertensive disorders during their pregnancies.
在一个由6662名白人孕妇组成的队列中，利用常规产前检查时测量的血压来研究年龄和产次对血压的影响。研究发现，年龄和产次对孕期血压均有显著影响。对于给定的年龄，无论是否纳入孕期被诊断患有高血压疾病的孕妇，初产妇的平均血压均高于经产妇。
