Open AccessIntervention during labor: risk factors associated with complete tear of the anal sphincter
Author(s) -
Bek Karl Møller,
Laurberg Søren
Publication year - 1992
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016349209041443
Subject(s) - medicine , episiotomy , forceps , logistic regression , anal sphincter , sphincter , obstetric labor complication , obstetrics , cephalic presentation , surgery , risk factor , pregnancy , vaginal delivery , genetics , biology
Among 41,200 consecutive deliveries there were 152 cases of complete tear of the anal sphincter (complete tear). In a case‐control design, the association between interventions during labor (forceps, vacuum extraction, use of oxytocin and prostaglandins and mediolateral episiotomy) and complete tear, were evaluated by confounder control using multiple logistic regression analysis. Controls chosen were the patients delivering just before and after the index patient with complete tear. Use of Kielland forceps, mediolateral episiotomy, shoulder dystocia and nulliparity were significantly associated with complete tear. Maternal age, presentation in labor, duration of second stage of labor and the indication for instrumental deliveries and episiotomy had no significant association with complete tear.