Table 2. Comparison of demographic and clinical characteristics of patients on invasive and non-invasive positive pressure ventilation.
* For both groups (NIPPV and IPPV), values at baseline were compared with those after 24 hours of ventilation
BP, Blood Pressure; IPPV, Invasive Positive Pressure Ventilation; NIPPV, Non-invasive Positive Pressure Ventilation; PaO2, Partial Pressure of Oxygen; PaCO2, Partial Pressure of Carbon dioxide; SD, Standard Deviation.
| Patients Characteristics | At baseline | At 24 hours of ventilation | P value within groups* | |||||
| NIPPV (n=30) | IPPV (n=30) | P value | NIPPV (n=30) | IPPV (n=30) | P value | NIPPV (n=30) | IPPV (n=30) | |
| Gender | ---------- | |||||||
| Male n (%) | 18 (60%) | 21 (70%) | 0.41 | |||||
| Female n (%) | 12 (40%) | 9 (30%) | ||||||
| Age, years | 65.4 ± 11.8 | 73.6 ± 13.2 | 0.01 | |||||
| PaCO2, mmHg | 63.2 ± 21.5 | 78.1 ± 20.2 | 0.007 | 57.2 ± 21.5 | 69.1 ± 20.2 | 0.03 | 0.28 | 0.08 |
| PaO2, mmHg | 61.3 ± 18.9 | 60.2 ± 21.4 | 0.83 | 74.6 ± 19.3 | 65.7 ± 13.4 | 0.04 | 0.009 | 0.23 |
| Respiratory rate per minute | 27.4 ± 3.1 | 29.7 ± 4.8 | 0.03 | 25.2 ± 3.1 | 27.9 ± 6.2 | 0.03 | 0.008 | 0.21 |
| Heart rate per minute | 113.4 ± 9.7 | 121.1 ± 11.3 | 0.006 | 103.2 ± 6.1 | 118.4 ± 9.5 | <0.0001 | <0.0001 | 0.32 |
| Systolic BP, mmHg | 146.2 ± 17.3 | 137.9 ± 13.4 | 0.04 | 138.1 ± 10.7 | 130.2 ± 7.5 | 0.001 | 0.03 | 0.008 |
| Diastolic BP, mmHg | 68.5 ± 15.6 | 86.1 ± 18.1 | 0.0002 | 84.2 ± 11.8 | 92.4 ± 15.3 | 0.02 | <0.0001 | 0.15 |