Table 5:
Comparative timed distribution of mean values (± standard deviation) of arterial blood pH
| Time point | Study group | n | Control group | n | P-value |
|---|---|---|---|---|---|
| Hour | |||||
| 6 | 7.37 ± 0.04 | 25 | 7.33 ± 0.04 | 25 | 0.003 |
| 12a | 7.40 ± 0.03 | 18 | 7.37 ± 0.05 | 15 | 0.03 |
| 18 | 7.42 ± 0.03 | 25 | 7.39 ± 0.03 | 25 | 0.001 |
| 24 | 7.43 ± 0.02 | 25 | 7.41 ± 0.03 | 25 | 0.01 |
| 36a | 7.44 ± 0.03 | 10 | 7.40 ± 0.03 | 7 | <10−4 |
| 48 | 7.45 ± 0.03 | 25 | 7.41 ± 0.03 | 25 | <10−4 |
| 60a | 7.45 ± 0.02 | 8 | 7.43 ± 0.03 | 9 | 0.005 |
| 72 | 7.45 ± 0.02 | 25 | 7.43 ± 0.04 | 25 | 0.016 |
| 84a | 7.45 ± 0.02 | 9 | 7.43 ± 0.04 | 10 | 0.1 (SNS) |
| 96 | 7.45 ± 0.03 | 25 | 7.45 ± 0.03 | 25 | 0.4 (SNS) |
| Day | |||||
| 5 | 7.45 ± 0.02 | 25 | 7.44 ± 0.03 | 25 | 0.17 (SNS) |
| 6 | 7.46 ± 0.03 | 25 | 7.44 ± 0.03 | 25 | 0.016 |
| 7 | 7.45 ± 0.03 | 25 | 7.45 ± 0.03 | 25 | 0.93 (SNS) |
| 14 | 7.44 ± 0.02 | 25 | 7.44 ± 0.04 | 25 | 0.82 (SNS) |
| 30 | 7.37 ± 0.04 | 25 | 7.33 ± 0.04 | 25 | 0.003 |
| 60 | 7.40 ± 0.03 | 25 | 7.37 ± 0.05 | 25 | 0.03 |
SNS: statistically non-significant.
aBlood samples were taken only from waking patients during night hours.