Research Article

ELISA Development for Serum Hemeoxygenase-1 and Its Application to Patients with Acute Respiratory Distress Syndrome

Table 3

Clinical characteristics of patients with ARDS.

CharacteristicsOverall cases ()Survivors ()Nonsurvivors () values, survivors versus nonsurvivors

Age, years68.5 (62.0–75.0)68.5 (56.5–75.0)67.5 (63.0–76.0)0.741
Male sex, (%)16 (73)6 (50)10 (100)0.009
Body mass index21.1 (18.6–23.1)21.5 (20.3–23.4)20.5 (18.3–23.1)0.410
APACHE II score25.5 (18.0–31.0)23.0 (17.0–31.0)26.5 (19.0–29.0)0.644
Severity of ARDS, (%)0.548
 Mild7 (32)5 (42)2 (20)
 Moderate11 (50)5 (42)6 (60)
 Severe4 (18)2 (17)2 (20)
Etiology of ARDS, (%)0.145
 Infection14 (64)6 (42)8 (80)
 Other causes8 (36)6 (58)2 (20)
Respiratory parameters
 D0 PaO2/FIO2 ratio165 (118–262)176 (131–302)141.5 (105.0–185.0)0.291
 D7 PaO2/FIO2 ratio198 (123–280)260 (183–365)140.5 (97.5–212.5)0.019
 D0 LIS2.5 (2.0–2.8)2.3 (1.6–2.5)2.8 (2.5–3.5)0.015
 D7 LIS2.3 (1.8–2.8)2.0 (1.5–2.3)3.0 (2.5–3.3)0.008
Blood parameters
 D0 HO-1, ng/mL75.4 (39.1–111.6)61.7 (28.7–96.2)100.5 (69.0–167.2)0.027
 D7 HO-1, ng/mL74.5 (22.1–130.6)32.5 (18.4–88.4)123.8 (72.2–148.4)0.008
 D0 LDH, U/L307 (242–437)307 (253–448)305 (237–437)0.843
 D7 LDH, U/L326 (263–448)326 (270–473)329 (245–418)0.847
 D0 CRP, mg/dL14.8 (9.7–24.1)12.8 (9.2–26.6)16.5 (11.4–20.3)0.921
 D7 CRP, mg/dL6.9 (2.5–13.8)7.7 (1.9–13.6)5.7 (4.9–16.6)0.642
Outcomes
Mechanical ventilation, days11.5 (7.0–21.0)9.5 (7.5–17.0)14.0 (5.0–24.0)0.668
Length ICU stay, days13.0 (9.0–26.0)11.5 (10.0–27.0)14.0 (5.0–26.0)0.741

Values are reported as median with 25–75th percentiles or %, unless otherwise indicated. Two of the 10 nonsurvivors died within 7 days. APACHE, acute physiology and chronic health evaluation; ARDS, acute respiratory distress syndrome; LIS, lung injury score; HO-1, hemeoxygenase-1; LDH, lactate dehydrogenase; CRP, C-reactive protein.