Fig. 3From: Time trends in episiotomy and severe perineal tears in Portugal: a nationwide register-based studyAdjusted relative risk for the association between calendar-year and SPT; 2000 as reference. * Adjusted for elderly primiparous, previous caesarean-section, induced labour, anomalous presentation or malposition of fetus, dystocia/disproportion/anomalous labour, baby large for gestational age and epidural anesthesiaBack to article page