Table 2 Statistically significant clinical variables from univariate analysis (dependent variable; SMO binary outcome variable) in the model design dataset (n = 600)
Parameters | Cases N = 200 | Controls N = 400 | Chi-square significance |
|---|---|---|---|
High systolic blood pressure (> 140), number (%) | 75 (68·8) | 34 (31·2) | < 0·001 |
Low systolic blood pressure (< 90), number (%) | 58 (61·7) | 36 (38·3) | < 0·001 |
High diastolic blood pressure (> 90), number (%) | 75 (64·7) | 41 (35·3) | < 0·001 |
Low diastolic blood pressure (< 60), number (%) | 110 (65·5) | 58 (34·5) | < 0·001 |
Severe tachypnoea (RR > 40), number (%) | 26 (92·9) | 2 (7·1) | < 0·001 |
Severe bradypnea (RR < 6), number (%) | 5 (100) | 0 (0) | < 0·001 |
Fever (Temp> 38), number (%) | 17 (94·4) | 1 (5·6) | < 0·001 |
Marked tachycardia (PR > 120), number (%) | 58 (71·6) | 23 (28·4) | < 0·001 |
Hypoxaemia (SP02 < 90%), number (%) | 14 (82·4) | 3 (17·6) | < 0·001 |
Caesarean delivery in present admission, number (%) | 51 (94.4) | 3 (5·6) | 0·001 |
Low urinary output (300 ml/24 h), number (%) | 12 (100) | 0 (0) | < 0·001 |
Prolonged unconsciousness (GCS < 8/15), number (%) | 14 (100) | 0 (0) | < 0·001 |
Blood transfusion in present admission, number (%) | 40 (67·8) | 19 (32·8) | 0·038 |
Last haematocrit level, mean (SD) | 27·6 (9·8) | 33·3 (5·9) | < 0·001 |
Days of admission, mean (SD) | 6·8 (5·2) | 1·6 (0·7) | 0·040 |