Details:

Alternative Title:
BJOG
Personal Author:
Callaghan, WM ; Prefumo, F
Callaghan, WM ; Prefumo, F Less -
Description:
To study whether pregnancy week at delivery is an independent risk factor for shoulder dystocia.|Population study.|Medical Birth Registry of Norway.|All vaginal deliveries of singleton offspring in cephalic presentation in Norway during 1967 through 2009 (n = 2,014,956).|The incidence of shoulder dystocia was calculated according to pregnancy week at delivery. The associations of pregnancy week at delivery with shoulder dystocia were estimated as crude and adjusted odds ratios using logistic regression analyses. We repeated the analyses in pregnancies with and without maternal diabetes.|Shoulder dystocia at delivery.|The overall incidence of shoulder dystocia was 0.73% (n = 14,820), and the incidence increased by increasing pregnancy week at delivery. Birthweight was strongly associated with shoulder dystocia. After adjustment for birthweight, induction of labour, use of epidural analgesia at delivery, prolonged labour, forceps-assisted and vacuum-assisted delivery, parity, period of delivery and maternal age in multivariable analyses, the adjusted odds ratios for shoulder dystocia were 1.77 (1.42-2.20) for deliveries at 32-35 weeks of gestation, and 0.84 (0.79-0.88) at 42-43 weeks of gestation, using weeks 40-41 as the reference. In pregnancies affected by diabetes (n = 11,188), the incidence of shoulder dystocia was 3.95%, and after adjustment for birthweight the adjusted odds ratio for shoulder dystocia was 2.92 (95% CI 1.54-5.52) for deliveries at weeks 32-35 of gestation, and 0.91 (95% CI 0.50-1.66) at 42-43 weeks of gestation.|The risk of shoulder dystocia was associated with increased birthweight, diabetes, induction of labour, use of epidural analgesia at delivery, prolonged labour, forceps-assisted and vacuum-assisted delivery, parity and period of delivery but not with post-term delivery.
Subjects:
[+]
Adult Analgesia, Obstetrical Birth Weight Delivery, Obstetric Diabetes, Gestational Dystocia Extraction, Obstetrical Female Gestational Age Humans Infant, Newborn Infant, Postmature Labor, Induced Logistic Models Odds Ratio Pregnancy Risk Factors Shoulder Term Birth Young Adult
Source:
BJOG. 121(1):34-42.
Pubmed ID:
24020942
Pubmed Central ID:
PMC4555866
Document Type:
Journal Article
Funding:
WGC0/Intramural CDC HHS/United States
Place as Subject:
Norway
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:8a32e198269105f0694bd1c443e321631b27b34b520638728b0fad18a3f009ad
Download URL:
https://stacks.cdc.gov/view/cdc/34004/cdc_34004_DS1.pdf
File Type:

Supporting Files

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