Table 4. Comparison of rates of examinations between two groups.
| Status | Early onset group(cases,%) | Late onset group(cases,%) | Pvalue | |
| serumpotassium | Hypokalemia(<3.5 mmol/L) | 14 (18.67%) | 82 (50%) | <0.0001 |
| normal | 61 (81.33%) | 79 (48.17%) | ||
| Hyperkalemia(>5.5 mmol/L) | 0 | 3 (1.83%) | ||
| serumsodium | Hyponatraemia | 37 (48.68%) | 94 (56.97%) | 0.198 |
| normal | 39 (51.32%) | 68 (41.21%) | ||
| hypernatremia | 0 | 3 (1.82%) | ||
| Serumchloride | Hypochloraemia | 29 (46.03%) | 98 (71.01%) | 0.003 |
| normal | 30 (47.62%) | 36 (26.09%) | ||
| hyperchloraemia | 4 (6.35%) | 4 (2.90%) | ||
| pH | >7.45 | 63 (82.89%) | 135 (82.82%) | 0.914 |
| normal | 11 (14.48%) | 25 (15.34%) | ||
| <7.35 | 2 (2.63%) | 3 (1.84%) | ||
| HCO3 − | >25 mmol/L | 43 (56.58%) | 136 (83.44%) | 2.17×10−5 |
| normal | 33 (43.42%) | 27 (16.56%) | ||
| PO2 | <10.7 kpa | 38 (50%) | 102 (62.58%) | 0.066 |
| normal | 38 (50%) | 61 (37.42%) | ||
| PCO2 | >6.0 kpa | 4 (5.26%) | 49 (30.06%) | 1.73×10−5 |
| normal | 72 (94.74%) | 114 (69.94%) |
Notes: detailed data not recorded in some medical records.