Prolonged resuscitation of metabolic acidosis after trauma is associated with more complications

Table 2 Univariate analysis for patients with post-operative complications

Variable	No complication^a	Complication^a	Significance
Variable	n = 266 (80.1 %)	n = 66 (19.9 %)	Significance
Age (years)	39.1 ± 16.2	40.3 ± 17.3	0.597
African-American race	53 (19.7 %)	15 (22.7 %)	0.505
Female gender	82 (31.1 %)	13 (19.7 %)	0.070
ISS	24.5 ± 9.3	36.4 ± 15.0	<0.0005†
ASA score	2.7 ± 0.8	3.3 ± 0.9	0.020†
BMI	29.5 ± 7.9	30.3 ± 7.7	0.483
OSH transfer	113 (42.5 %)	30 (45.5 %)	0.679
Time to EAC resuscitation (hours)	6.29 ± 8.24	9.07 ± 10.58	0.022†
Number of fractures^b	1.1 ± 0.4	1.2 ± 0.4	0.331
Presence of a femur fracture^c	138 (51.9 %)	21 (31.8 %)	0.005†
Presence of an acetabulum fracture	46 (17.3 %)	10 (15.2 %)	0.854
Presence of a pelvic ring fracture	49 (18.4 %)	21 (31.8 %)	0.027†
Presence of a cervical spine fracture	3 (1.1 %)	3 (4.5 %)	0.096
Presence of a thoracolumbar spine fracture	52 (19.5 %)	21 (31.8 %)	0.045†

ISS Injury Severity Score, ASA American Society of Anesthesiologists’ Classification, BMI body mass index, OSH outside hospital transfer
†p < 0.05
^aThe values are given as the mean and the standard deviation for continuous variables and as the number of patients in the respective outcome group, with the percentage in parentheses for categorical variables
^bCompared with the chi-square test
^cTwelve patients sustained bilateral femur fractures. Since the univariate analysis was designed to assess the presence or absence of a femur fracture, the number of individuals with femur fractures (159) is less than and discordant with the number of femur fractures in total (171)

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