Table 1.

Clinical characteristics of women at inclusion

	Disposable cup group (n = 295)	Metallic cup group (n = 283)
Clinical characteristics
Maternal age (years), mean ± SD	28 ± 5	29 ± 5
Maternal weight (Kg) mean ± SD	73.4 ± 13.1	72.6 ± 13.9
Gestational age (weeks) mean ± SD	40 ± 1	40 ± 1
Nulliparous n (%)	190 (64.4 %)	206 (72.8 %)
Anesthesia n (%)
Epidural	294 (99.7 %)	278 (98.2 %)
Other (spinal, general anesthesia)	4 (1.4 %)	1 (0.4 %)
Comorbidities n (%)
Diabetes	14 (4.8 %)	13 (4.6 %)
Hypertension	4 (1.4 %)	5 (1.8 %)
Other morbidities	30 (10.2 %)	23 (8.1 %)