Pregnant women’s clinical characteristics, intrapartum interventions, and duration of labour in urban China: a multi-center cross-sectional study

Table 4 Multivariable linear regression of factors associated with duration of total stage of labour

Variables	β^a	95%CI	t Test	P value
Age	0.01	(−0.01, 0.02)	0.98	0.328
Epidural analgesia^b	0.85	(0.73, 0.96)	15.63	< 0.001
Parity^c	−0.54	(−0.62, -0.37)	−7.84	< 0.001
Continuous EFM^b	0.12	(0.02, 0.23)	2.11	0.035
Amniotomy^b	0.09	(−0.03, 0.21)	1.49	0.136
Birth weight	0.20	(0.06, 0.34)	2.81	0.005

EFM Electronic fetal monitoring; CI Confidence interval;
^aDue to skewness of the distribution of labour duration, data was z-transformed before analysed using multivariable linear regression; ^bBinary variable (yes = 1, no = 0); ^cBinary variable (nullipara = 0, multipara = 1)

ISSN: 1471-2393