Table 2. Clinical Outcome Data.

Outcome	Patients, No. (%)		Adjusted RR (95% CI)a
	Pre–providing supplements (January 1 to August 1, 2019)	Post–providing supplements (May 13 to December 13, 2020)
Postpartum transfusion, No. (No. per 1000)b	71 (10.0)	46 (6.6)	0.62 (0.43-0.91)
Hematocrit 24-32 weeks, mean (SD)	34.7 (3.3)	35.2 (3.1)	0.45 (0.33-0.51)c
Anemia 24-32 weeks	377 (7)	278 (5)	0.68 (0.59-0.79)
Hematocrit at delivery admission, mean (SD)	34.0 (4.4)	35.3 (4.3)	1.27 (1.13-1.42)c
Anemia delivery admission	1237 (18)	782 (11)	0.61 (0.56-0.66)
Hematocrit at delivery discharge, mean (SD)	30.8 (3.7)	31.1 (3.7)	0.36 (0.23-0.48)c
Anemia delivery discharge	2810 (41)	2550 (36)	0.89 (0.85-0.93)

Abbreviation: RR, risk ratio.

^a Adjusted for: age, race and ethnicity, body mass index, insurance payer status, and nulliparity through logistic regression.

^b Transfusion for acute blood loss anemia included those transfused 1 to 2 units of packed red blood cells or whole blood and excluded transfusions for abruption, previa, atony, operative complication, vaginal trauma, sickle cell, hypovolemia, oliguria or the receipt of platelets, plasma, or cryoprecipitate.

^c Adjusted mean difference (95% CI) evaluated at the midpoint of adjustment factors.