Factors associated with maternal morbidity in the Term Breech Trial.
OBJECTIVE
In the Term Breech Trial, the risk of maternal morbidity in women who delivered after planning for a caesarean section (CS) was not significantly different from those who delivered after planning for a vaginal birth. We undertook secondary analyses to determine factors associated with maternal morbidity among 2078 women.


METHODS
By using multiple logistic regression analyses, we determined the effect of prelabour CS, CS during early labour, CS during active labour, vaginal birth, and other factors on maternal morbidity. For 1536 women delivered after labour, we determined the effect of variables associated with labour on maternal morbidity.


RESULTS
The risk of maternal morbidity was lowest following vaginal birth (odds ratio [OR] 1.0) and highest following CS during active labour (OR 3.33; 95% confidence intervals [CI] 1.75-6.33, P < 0.001). For those delivered after labour, a short active phase of the second stage of labour (< 30 minutes) was associated with the lowest risk of maternal morbidity (OR 0.25; 95% CI 0.11-0.57, P < 0.001).


CONCLUSIONS
For women with a singleton fetus in breech resentation at term, maternal morbidity is lowest following vaginal birth and highest following CS during active labour.
Su
Min
M
Department of Obstetrics and Gynaecology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON.
McLeod
Lynne
L
Department of Obstetrics and Gynaecology, IWK Health Centre, Dalhousie University, Halifax, NS.
Ross
Sue
S
Department of Obstetrics and Gynaecology, University of Calgary, Calgary, AB.
Willan
Andrew
A
Department of Public Health Sciences, University of Toronto, Toronto, ON.
Hannah
Walter J
WJ
Department of Obstetrics and Gynaecology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON.
Hutton
Eileen K
EK
Department of Family Practice, Division of Midwifery, University of British Columbia, Vancouver, BC.
Hewson
Sheila A
SA
University of Toronto, Maternal Infant and Reproductive Health Research Unit, Women's College Research Institute, Toronto, ON.
McKay
Darren
D
University of Toronto, Maternal Infant and Reproductive Health Research Unit, Women's College Research Institute, Toronto, ON.
Hannah
Mary E
ME
Department of Obstetrics and Gynaecology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON.
D000328:Adult; D001946:Breech Presentation; D002170:Canada / Q000453:epidemiology; D002585:Cesarean Section / Q000009:adverse effects / Q000706:statistics & numerical data; D036861:Delivery, Obstetric / Q000009:adverse effects / Q000379:methods / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D017063:Outcome Assessment, Health Care; D011247:Pregnancy; D011644:Puerperal Disorders / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors