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Table 2 Characteristics of patients and newborns

From: Evaluation of Suzor forceps training by studying obstetric anal sphincter injuries: a retrospective study

Variables
Age. median (standard deviation) 29.2 (± 5.3)
BMI. median (standard deviation) 22.3 (± 4.5)
Primiparity. n (%) 995 (79.4%)
Scarred uterus. n (%) 136 (10.8%)
Analgesia. n (%) 1243 (99.2%)
Indication of instrumental delivery:
 Abnormal fetal heart. n (%) 758 (60.5%)
 Arrest of fetal descent. n (%) 489 (39.0%)
 Contraindications to expulsive efforts. n (%) 6 (5.8%)
Induced labor. n (%) 350 (27.9%)
Progression of the fetus at the time of the first instrument used:
 Pelvic inlet. n (%) 158 (12.6%)
 Midpelvis. n (%) 1022 (81.6%)
 Pelvic outlet. n (%) 73 (0.06%)
Operative delivery in the occipito-sacral position. n (%) 84 (6.7%)
Intact perineum. n (%) 10 (0.8%)
Perineal tears:
 1st degree. n (%) 80 (6.4%)
 2nd degree. n (%) 82 (6.5%)
 3rd degree. n (%) 70 (5.6%)
 4th degree. n (%) 12 (1.0%)
Episiotomy. n (%) 1128 (90.0%)
Episiotomy without any other associated lesion. n (%) 999 (79.7%)
Blood loss over 500 mL. (%) 74 (6.3%)
Newborn’s weight in grams. Mean (standard deviation) 3277 (± 439)
Newborn’s weight ≥ 4000 g. n (%) 54 (4.3%)
Cranial perimeter (cm). median (standard deviation) 35 (± 1.2)
Gestational age at delivery in weeks of gestation. Median (standard deviation) 40 (± 1.4)
Premature births before 37 weeks of gestation. n (%) 53 (4.2%)