Table 1: Baseline characteristics of patients in the ARDS and non-ARDS groups.

VariableNon-ARDS group ()ARDS group () value

Age, yr58.5 ± 20.360.0 ± 17.10.107
Male82 (72.6%)35 (77.8%)0.500
EthnicityHan (100.0%)Han (100.0%)1.000
Patients resource0.979
 Family46 (40.7%)19 (42.2%)0.861
 Other departments18 (15.9%)7 (15.6%)0.954
 General wards of the respiratory department2 (1.8%)1 (2.2%)0.851
 Other hospital47 (41.6%)18 (40.0%)0.854
Primary diagnosis at admission0.364
 Respiratory59 (52.2%)31 (68.9%)0.056
 Trauma31 (27.4%)6 (13.3%)0.059
 Other7 (6.2%)3 (6.7%)0.912
 Acute abdominal disease7 (6.2%)1 (2.2%)0.304
Cardiopulmonary resuscitation3 (2.7%)1 (2.2%)0.878
 Operation6 (5.3%)3 (6.7%)0.740
Predisposing conditions
 Category0.128
 Shock7 (6.2%)5 (11.1%)0.292
 Sepsis34 (30.1%)23 (51.1%)0.013
 Pancreatitis5 (4.4%)1 (2.2%)0.513
 Pneumonia82(72.6%)38 (84.4%)0.115
 High-risk surgery3 (2.7%)1 (2.2%)0.876
 Trauma31 (27.4%)5 (11.1%)0.027
Number0.580
 Include 1 factor: n (%)57 (50.4%)19 (40.2%)0.351
 Include 2 factors: n (%)43 (38.1%)20 (44.4%)0.459
 Include 3 factors: n (%)11 (9.7%)6 (13.3%)0.510
 Include 4 factors: n (%)2 (1.8%)0 (0.0%)0.369
APACHE2 score14.7 ± 6.018.5 ± 7.20.001
LIPS4.4 ± 2.15.6 ± 1.80.001
60-day outcome16 (14.2%)21 (46.7%)<0.001
Use of vasopressors23 (20.3%)19 (42.2%)0.005
Methods of respiratory support<0.001
 Oxygen inhalation through the nasal tube33 (29.2%)14 (31.1%)0.813
 Noninvasive ventilation25 (22.1%)10 (22.2%)0.989
 Invasive mechanical ventilation48 (42.5%)21 (46.7%)0.632
 Noninvasive and invasive mechanical ventilation7 (6.2%)13 (28.9%)<0.001

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