ABO and RhD blood group are not associated with mortality and morbidity in critically ill patients; a multicentre observational study of 29 512 patients

Table 2 Outcomes^a

Blood group	Total	A	B	AB	O	P-value^b	RhD positive	RhD negative	P-value^c
N	29,512	12,969	3421	1416	11,706		24,797	4715
28–day mortality, %	24	24	23	25	25	0.448	25	24	0.451
90–day mortality, %	29	29	28	30	29	0.237	29	29	0.626
DAFvent^d	27 (0–28)	27 (16–28)	27 (19–28)	27 (17–28)	27 (16–28)	0.774	27 (0–28)	27 (0–28)	0.188
DAFcirc^e	28 (0–28)	28 (0–28)	28 (0–28)	28 (0–28)	28 (0–28)	0.356	28 (0–28)	28 (0–28)	0.608
SOFA-max^f	7 (1–15)	7 (1–15)	7 (1–16)	7 (1–15)	7 (1–15)	0.867	7 (1–11)	7 (1–11)	0.813
Length-of-stay, days	1.5 (0.2–12)	1.5 (0.2–12)	1.5 (0.2–12)	1.6 (0.2–11)	1.5 (0.2–12)	0.154	1.5 (0.7–3.4)	1.5 (0.7–3.3)	0.646

^aContinuous variables are presented as median (5–95 percentile) and numbers with (%)
^bChi-square test or Kruskal-Wallis test for differences between ABO blood groups
^cChi-square test or Mann-Whitney-U test for differences between RhD status groups
^dDays alive and free of invasive ventilation
^eDays alive and free of circulatory support
^fMaximum of Sequential Organ Failure Assessment score during the ICU stay

ISSN: 1471-2253