Obstetric blood transfusion in placenta previa patients with prenatal anemia: a retrospective study

Table 3 Association between maternal anemia and maternal outcomes in patients with placenta previa

Outcomes	Normal	Anemia
Outcomes	Normal	OR/β (95% CI)^a	aOR/β (95% CI)^b	aOR/β (95% CI)^c
Blood transfusion rate	1.0	4.87 (3.53, 6.72)	4.98 (3.48, 7.13)	4.89 (3.39, 7.06)
Red blood cell transfusion units	0	2.72 (2.21, 3.23)	2.45 (1.94, 2.96)	2.29 (1.80, 2.77)
Massive blood transfusion rate	1.0	8.41 (3.55, 19.87)	6.90 (2.88, 16.51)	7.33(3.01, 17.81)
Fresh plasma transfusion rate	1.0	3.93 (2.88, 5.37)	3.88 (2.73, 5.51)	3.91 (2.72, 5.62)
Fresh plasma transfusion volume	0	216.25 (166.09, 266.42)	181.76 (132.72, 230.79)	167.07 (120.98, 213.16)

Multivariable regression analyses were conducted to explore the correlation between anemia in patients with anterior placenta previa and intraoperative blood product use
Abbreviations: OR odds ratio, CI confidence interval
^aNon-adjusted model
^bAdjusted for age (continuous), region, occupation, BMI (continuous), type of placenta previa, placental location, placenta accrete spectrum
^cAdjusted for region, occupation, Number of caesarean sections, uterine anomalies (bicornuate uterus, adenomyosis, uterine fibroids or prior uterine surgery), hemorrhage during pregnancy, emergency surgery, placental location, placenta previa types, and placenta accrete spectrum. Massive blood transfusion is defined as the transfusion of 10 units of packed red blood cells within a 24-h period

ISSN: 1471-2393