Table 1. Sociodemographic and Obstetrics characteristics.

Characteristics	n	Mean ± SD
Age (years old)	270	24.67 ± 6.2
BMI (antepartum) a	244	28.85 ± 4.6
Parity	270	0.80 ± 1.10
Gestational age (in weeks)	270	38.93 ± 1.47
Education (in years) b	231	9.91 ± 2.5
Time to second stage (in minutes) c	223	32.47 ± 34.7
Initial Hb (in g/dL) d	260	11.45 ± 0.1
Ethnicity - white e	178 (67%)
Previous C-Section	42 (15.5%)
Spontaneous onset of labor	203 (75.2%)
Anesthesia/analgesia (yes)	170 (63%)
Mode of delivery
vaginal	247 (91.5%)
forceps	23 (8.5%)
Episiotomy (yes)	96 (36%)
Laceration (≥ grade 2)	155 (57.1%)
Blood loss within 120 minutes
≥ 500 mL	84 (31%)
≥ 1000 mL	22 (8.2%)

Abbreviations: BMI, body mass index; Hb, hemoglobin.

Missing: ^a 26; ^b 39; ^c 47; ^d 10; ^e 7; ^a in Kg/m ² .