Kristensen J, Langhoff-Roos J, Wittrup M, Bock J E
Department of Obstetrics and Gynecology, University Hospital (Rigshospitalet), Copenhagen, Denmark.
Acta Obstet Gynecol Scand. 1993 Nov;72(8):640-4. doi: 10.3109/00016349309021157.
Evaluate the effect of cervical conization on preterm birth/low birth weight (LBW).
A systematic review of the literature using external or internal controls.
The typical odds ratio for preterm delivery in women with prior cervical conization using external controls was 3.23 (95% confidence interval 2.29-4.55). Using internal controls the typical odds ratio for LBW was 2.97 (95% confidence interval 1.09-8.05). Using external controls the typical odds ratio for LBW was 2.31 (95% confidence interval 1.33-3.99).
Women with cervical conization are at higher risk for preterm birth than external controls, and the surgical intervention as such is a major determining factor.
评估宫颈锥切术对早产/低出生体重（LBW）的影响。
采用外部或内部对照对文献进行系统综述。
采用外部对照时，既往有宫颈锥切术的女性早产的典型比值比为3.23（95%置信区间2.29 - 4.55）。采用内部对照时，低出生体重的典型比值比为2.97（95%置信区间1.09 - 8.05）。采用外部对照时，低出生体重的典型比值比为2.31（95%置信区间1.33 - 3.99）。
宫颈锥切术女性早产风险高于外部对照，手术干预本身是一个主要决定因素。
