Table 1. Biological and clinical characteristics of patients in intensive care according to NRBC status.

Characteristics	All patients	NRBC-positive (n = 83)	NRBC-negative (n = 69)	p
Sex
Male	67 (44.1%)	40 (48.2%)	27 (22.0%)	0.263
Female	85 (51.8%)	43 (51.8%)	42 (78.0%)
Age (in years)	60.6 ± 16.8	63.0 ± 16.1	57.6 ± 17.4	0.049 †
Skin color
White	59 (38.8%)	30 (36.1%)	29 (42.0%)	0.707
Mixed	67 (44.1%)	39 (47.0%)	28 (40.6%)
Black	26 (17.1%)	14 (16.9%)	12 (17.4%)
Origin
Emergency	123 (80.9%)	65 (78.3%)	58 (84.1%)	0.568
Wards	22 (14.5%)	13 (15.7%)	9 (13.0%)
CTRU	7 (4.6%)	5 (6.0%)	2 (2.9%)
Median duration of stay in ICU (in days)*	7 (4; 11)	10 (5; 13)	4 (3; 7)	< 0.001 †
Mortality
ICU	56 (36.8%)	41 (49.4%)	15 (21.7%)	< 0.001 †
Hospital	74 (48.7%)	51 (61.4%)	23 (33.3%)	0,001 †
Median APACHE II*	21 (14; 27.5)	25 (19; 33)	15 (11; 22)	< 0.001 †
APACHE II
< 25 points	56 (36.8%)	39 (47.0%)	57 (82.6%)	< 0.001 †
≥ 25 points	96 (63.2%)	44 (53.0%)	12 (17.4%)
Median SOFA*	5 (2; 9)	8 (4; 11)	3 (1; 7)	< 0.001 †
SOFA score
< 7 points	86 (56.6%)	35 (42.2%)	51 (73.9%)	< 0.001 †
≥ 7 points	66 (43.4%)	48 (57.8%)	18 (26.1%)
SEPSIS
Yes	84 (55.3%)	59 (71.1%)	25 (36.2%)	< 0.001 †
No	68 (44.7%)	24 (28.9%)	44 (63.8%)
Coronary patient
Yes	74 (48.7%)	34 (41.0%)	40 (58.0%)	0.037 †
No	78 (51.3%)	49 (59.0%)	29 (42.0%)
Coronary/Sepsis
Sepsis and coronary	30 (19.7%)	19 (22.9%)	11 (15.9%)	< 0.001 †
Sepsis and non-coronary	54 (35.5%)	40 (48.2%)	14 (20.3%)
No sepsis and coronary	44 (29.0%)	15 (18.1%)	29 (42.0%)
No sepsis and non-coronary	24 (15.8%)	9 (10.8%)	15 (21.7%)

NRBCs: nucleated red blood cells APACHE II: Acute Physiology and Chronic Health Evaluation II. SOFA: Sequential Organ Failure Assessment CTRU: Cardio-Thoracic Recovery Unit.

^† Statistically significant association.

*Median (P25; P75).