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Table 2 Hemoglobin, hematocrit, and reticulocyte count ration in twins in depending on chorionicity and mode of delivery

From: Hemoglobin differences in twins are related to the time of cord clamping, not intertwin transfusion – a prospective cohort study

  Twin 1   Twin 2
HGB (g/dL) median (IQR) HCT (%) median (IQR) Reticulocyte count ratio median (IQR) HGB (g/dL) median (IQR) p HCT (%) median (IQR) p
At birth
 MC 18 (16.7–19.8) 51.5 (47.3–56.7) 0.9 (0.5–1.4) 18.2 (17.2–19.8) 0.9 52.1 (549.4–56.1) 0.8
 DC 17.5 (16.5–18.9) 50.3 (47.1–55.2) 1 (0.6–1.4) 18.3 (17.6–18.5) 0.3 52.5 (48.1–55.4) 0.3
 p 0.1 0.2 0.9 0.5   0.6  
24–48 h after delivery
 MC 17.1 (15.8–19) 48.8 (45.2–53.7)   17.8 (16.5–19.5) 0.2 51.3 (46.5–55.4) 0.2
 DC 17 (15.6–18.7) 48.1 (44.8–53.4)   17.3 (15.9–19.3) 0.2 49.5 (45.3–53.7) 0.2
 p 0.3 0.6   0.6   0.5  
At birth
 VD 18 (16.7–19.7) 52.8 (48.2–56.3) 0.9 (0.5–1.3) 17.5 (16.2–19) 0.2 49.7 (48.1–54.5) 0.2
 CS 17.8 (16.5–19.1) 50.8 (46.7–55.6) 1 (0.5–1.4) 18.4 (16.9–19.8) 0.1 52.5 (48.8–56) 0.05
 p 0.3 0.3 0.8 0.03   0.05  
24–48 h after delivery
 VD 16.8 (15.9–19.2) 48 (40–54.2)   17.2 (15.9–17.6) 0.8 48.2 (45.5–50.9) 0.7
 CS 17.2 (15.6–18.8) 48.5 (44.9–53.4)   17.9 (15.9–19.5) 0.01 51.4 (46.2–55.6) 0.01
 p 0.04 0.5   0.04   0.06  
  1. HGB hemoglobin, HCT hematocrit, IQR interquartile range, MC monochorionic, DC dichorionic, VD vaginal delivery, CS cesarean section