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. 2015 Jul-Sep;13(3):357–363. doi: 10.1590/S1679-45082015AO3313

Table 2. Clinical presentation of study patients.

Characteristic <65 years 317 (37.4%) ≥65 years 531 (62.6%) p value
APACHE II score, median [IQR] 19 [15-24] 22 [18-28] <0.001
Arterial lactate (mmol/L), median [IQR] 2.4 [1.3-4.1] 2.2 [1.4-3.6] 0.285
Severe sepsis, n (%) 141 (44.5) 230 (43.3) 0.775
Septic shock, n (%) 176 (55.5) 301 (56.7)  
Clinical presentation, n (%)      
Hypotension 229 (72.2) 384 (72.3) 1.000
Lactate ≥4.0mmol/L 86 (27.7) 101 (19.7) 0.008
Number of organ dysfunctions, median [IQR] 2 [2-4] 3 [2-3] 0.829
Organ dysfunction, n (%)      
Circulatory 230 (72.6) 361 (68.0) 0.165
Respiratory 181 (57.1) 325 (61.2) 0.248
Renal 136 (42.9) 205 (38.6) 0.220
CNS 92 (29.0) 181 (34.1) 0.130
Hepatic 19 (6.0) 17 (3.2) 0.055
Metabolic 106 (33.4) 177 (33.3) 1.000
Hematologic 93 (29.3) 130 (24.5) 0.126

p values are given by χ2 test for binary variables and Mann-Whitney U test for continuous variables; APACHE II: Acute Physiology and Chronic Health Evaluation II (the score can range from zero to 71, with higher scores indicating more severe illness); IQR: interquartile range; CNS: central nervous system.