Association between women's self-diagnosis of labor and labor duration after admission.

AIMS To examine the association between women's perception of onset and the duration of labor after hospital admission. METHODS Women whose labor started spontaneously at term, delivering at the Hannover Medical School Hospital, Germany, between 2001 and 2004 were asked when and how labor had started. Answers were analyzed using structured content analysis. Women's symptoms were grouped in eight predefined categories; inter-rater agreement was assessed (kappa=0.93). Associations between women's symptoms and labor duration after admission were also analyzed. RESULTS Duration of labor after admission was longer in nulliparas (n=347) than in multiparas (n=304, P<0.001). Nulliparas experienced shorter labor in association with recurrent pain, advanced cervical dilatation at admission and spontaneous rupture of membranes. Oxytocin augmentation and epidural analgesia were associated with a longer duration. In multiparas, advanced cervical dilatation at admission, spontaneously ruptured membranes, blood-tinged mucus or emotional upheaval perceived by women were associated with a shorter interval from admission until birth. CONCLUSIONS How women diagnose their onset of labor relates to some extent with labor duration after admission. Recognized symptoms and their association with labor duration differed between nulliparas and multiparas.