Table 2.

Main demographic characteristics of the mother in the two categories of umbilical cord insertion site.

Variables		Central (n = 343)	Peripheral (n = 185)	P value
Age in years	Mean ± SD	29.4 ± 5.4	29.2 ± 5.3	ns
	Min–max	17–42	16–41
Parity	Median score	2	2	ns
	[Interquartile range]	[1]	[2]
	Min–max	1–7	1–8
Body mass index (BMI) in kg/m2	Mean ± SD	22.9 ± 4.2	23.1 ± 4.8	ns
	Min–max	16–41	16–49
Primiparas	Number (%)	136/343 (39.7%)	81/185 (43.8%)	ns
	95% CI	[0.34–0.45]	[0.37–0.51]
Multiparas	Number (%)	207/343 (60.3%)	104/185 (56.2%)	ns
	95% CI	[0.55–0.66]	[0.49–2.03]
Caucasian	Number (%)	222/343 (64.7%)	121/185 (65.4%)	ns
	95% CI	[0.60–0.70]	[0.59–0.72]
North African	Number (%)	102/343 (29.7%)	55/185 (29.7%)	ns
	95% CI	[0.25–0.35]	[0.23–0.36]
African	Number (%)	13/343 (3.8%)	8/185 (4.3%)	ns
	95% CI	[0.02–0.06]	[0.01–0.77]
Asian	Number (%)	6/343 (1.8%)	1/185 (0.6%)	ns
	95% CI	[0.00–0.03]	[−0.01-0.02]