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Effect of obesity on length of labor in nulliparous women.
Am J Perinatol. 2012 Feb; 29(2):127-32.AJ

Abstract

We compared the duration of labor among nulliparous women with varying body mass index (BMI). Laboring nulliparous women at >37 weeks were included. First visit BMI was used to categorize weight as normal (≤24), overweight (25 to 29.9), or obese (≥30 kg/m(2)). Chi-square, one-way analysis of variance, and Bonferroni multiple comparisons tests were used. During 15 months, 375 women met the inclusion criteria, and 38% were obese. Duration of first stage of labor was significantly longer for obese versus normal-weight women (26.76 ± 0.77 versus 23.87 ± 0.66 hours; p = 0.024) but not between normal versus overweight women (p = 1.00) or overweight versus obese women (p = 0.114). The cesarean delivery rate was significantly different in the three groups (p = 0.0001), highest among obese (47%) and lowest in normal-weight women (24%). When adjusted for age, hypertension, and induction, the likelihood of completing stage I was significantly less among obese nulliparous than those with BMI < 24 kg/m(2) (hazard ratio 0.73, 95% confidence intervals 0.54, 0.99). Compared with those with BMI < 24, the duration of stage I is significantly longer among obese women, even when adjusted for maternal age, induction, and hypertension.

Authors+Show Affiliations

Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, Virginia 23507, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22105434

Citation

Hilliard, Allyson M., et al. "Effect of Obesity On Length of Labor in Nulliparous Women." American Journal of Perinatology, vol. 29, no. 2, 2012, pp. 127-32.
Hilliard AM, Chauhan SP, Zhao Y, et al. Effect of obesity on length of labor in nulliparous women. Am J Perinatol. 2012;29(2):127-32.
Hilliard, A. M., Chauhan, S. P., Zhao, Y., & Rankins, N. C. (2012). Effect of obesity on length of labor in nulliparous women. American Journal of Perinatology, 29(2), 127-32. https://doi.org/10.1055/s-0031-1295653
Hilliard AM, et al. Effect of Obesity On Length of Labor in Nulliparous Women. Am J Perinatol. 2012;29(2):127-32. PubMed PMID: 22105434.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of obesity on length of labor in nulliparous women. AU - Hilliard,Allyson M, AU - Chauhan,Suneet P, AU - Zhao,Yueqin, AU - Rankins,Nicole C, Y1 - 2011/11/21/ PY - 2011/11/23/entrez PY - 2011/11/23/pubmed PY - 2012/6/5/medline SP - 127 EP - 32 JF - American journal of perinatology JO - Am J Perinatol VL - 29 IS - 2 N2 - We compared the duration of labor among nulliparous women with varying body mass index (BMI). Laboring nulliparous women at >37 weeks were included. First visit BMI was used to categorize weight as normal (≤24), overweight (25 to 29.9), or obese (≥30 kg/m(2)). Chi-square, one-way analysis of variance, and Bonferroni multiple comparisons tests were used. During 15 months, 375 women met the inclusion criteria, and 38% were obese. Duration of first stage of labor was significantly longer for obese versus normal-weight women (26.76 ± 0.77 versus 23.87 ± 0.66 hours; p = 0.024) but not between normal versus overweight women (p = 1.00) or overweight versus obese women (p = 0.114). The cesarean delivery rate was significantly different in the three groups (p = 0.0001), highest among obese (47%) and lowest in normal-weight women (24%). When adjusted for age, hypertension, and induction, the likelihood of completing stage I was significantly less among obese nulliparous than those with BMI < 24 kg/m(2) (hazard ratio 0.73, 95% confidence intervals 0.54, 0.99). Compared with those with BMI < 24, the duration of stage I is significantly longer among obese women, even when adjusted for maternal age, induction, and hypertension. SN - 1098-8785 UR - https://www.unboundmedicine.com/medline/citation/22105434/Effect_of_obesity_on_length_of_labor_in_nulliparous_women_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-0031-1295653 DB - PRIME DP - Unbound Medicine ER -