TABLE 3.
Results of univariable analysis of laboratory factors in venous blood associated with mortality in 230 critically ill calves
| Variable | Categories | Observed mortality | P‐value | OR | 95% CI |
|---|---|---|---|---|---|
| pH | >7.18 (ref) | 55.0% (72/131) | |||
| ≤7.18 | 78.7% (37/47) | .005 | 3.0 | 1.4‐6.6 | |
| pCO2 | <45.35 mm Hg (ref) | 49.4% (38/77) | |||
| ≥45.35 mm Hg | 69.7% (69/99) | .007 | 2.4 | 1.3‐4.4 | |
| pO2 (mmHg) | .17 | 0.98 | 0.95‐1.0 | ||
| HCO3 | 91.6‐171.4 mg/dL (15.1‐28.0 mmol/L) (ref) | 55.1% (43/78) | .25 | ||
| ≤91.5 mg/dL (15.0 mmol/L) | 71.1% (27/38) | .1 | 2.0 | 0.87‐4.6 | |
| ≥171.5 mg/dL (28.1 mmol/L) | 57.5% (23/40) | .81 | 1.1 | 0.51‐2.4 | |
| Packed cell volume | <47.5% (ref) | 57.0% (81/142) | |||
| ≥47.5% | 85.7% (18/21) | .02 | 4.5 | 1.3‐16.0 | |
| Base excess | ≥−5 mEq/L (ref) | 51.5% (50/97) | |||
| <−5 mEq/L | 69.0% (58/84) | .02 | 2.1 | 1.1‐3.9 | |
| Hypoglycemia | >55 mg/dL (ref) | 53.4% (71/133) | <.001 | 5.5 | 2.2‐14.0 |
| ≤55 mg/dL | 86.4% (38/44) | ||||
| Sodium | <147.55 mEq/L (ref) | 57.0% (81/142) | |||
| ≥147.55 mEq/L | 70.6% (24/34) | .15 | 1.8 | 0.81‐4.1 | |
| Potassium | <6.08 mEq/L (ref) | 57.7% (94/163) | |||
| ≥6.08 mEq/L | 90.0% (18/20) | .01 | 6.6 | 1.5‐29.4 | |
| Chloride (mEq/L) | .16 | 0.97 | 0.93‐1.0 | ||
| Calcium | ≥4.69 mg/dL (1.17 mmol/L) (ref) | 55.9% (66/118) | |||
| <4.69 mg/dL (1.17 mmol/L) | 73.2% (41/56) | .03 | 2.2 | 1.1‐4.3 | |
| Lactate | <96.22 mg/L (10.68 mmol/L) | 48.8% (20/41) | |||
| ≥96.22 mg/L (10.68 mmol/L) | 92.3% (12/13) | .02 | 12.6 | 1.5‐106.0 | |
| Urea | <26.13 mg/dL (4.35 mmol/L) | 52.2% (12/23) | |||
| ≥26.13 mg/dL (4.35 mmol/L) | 73.2% (30/41) | .09 | 2.5 | 0.86‐7.3 | |
| Creatinine | <2.22 mg/dL (196 μmol/L) | 50.0% (18/36) | |||
| ≥2.22 mg/dL (196 μmol/L) | 83.3% (25/30) | .007 | 5.0 | 1.6‐16.0 | |
| Leukocytes | 3.40‐11.30 × 109/L | 64.3% (9/14) | .27 | ||
| ≤3.39 × 109/L | 85.7% (6/7) | .32 | 3.3 | 0.31‐36.1 | |
| ≥11.31 × 109/L | 44.4% (4/9) | .35 | 0.44 | 0.08‐2.5 | |
| Neutrophils | 2.1‐12.3 × 109/L | 61.5% (8/13) | .7 | ||
| ≤2.1 × 109/L | 71.4% (5/7) | .66 | 1.6 | 0.22‐11.4 | |
| ≥12.3 × 109/L | 50.0% (4/8) | .61 | 0.63 | 0.11‐3.7 | |
| Lymphocytes | 1.2‐10.6 × 109/L | 55.6% (10/18) | |||
| <1.2 × 109/L | 75.0% (9/12) | .29 | 2.4 | 0.48‐11.9 | |
| >10.6 × 109/L | / | ||||
| Thrombocytes | <359.5 K/μL | 58.8% (10/17) | |||
| ≥359.5 K/μL | 75.0% (9/12) | .37 | 2.1 | 0.41‐10.7 | |
| Total protein | ≥5.5 g/dL | 47.1% (16/34) | |||
| <5.5 g/dL | 78.3% (18/23) | .02 | 4.1 | 1.2‐13.4 |
Abbreviations: 95% CI, 95% confidence interval; bpm, beats or breaths per minute; d, day(s); OR, odds ratio; ref, reference.