Table 5.
Comparison of various variables between cases with and without mechanical ventilation duration ≥ 7 days.
| Variables | Mechanical ventilation duration ≥7 days | Mean | SD | Median | IQR | Z value | P value |
|---|---|---|---|---|---|---|---|
| Duration of PICU stay (days)^ | Yes | 17.839 | 11.519 | 14.000 | 12.800 | -3.618 | 0.0003 |
| No | 8.050 | 4.300 | 7.350 | 6.400 | Difference is significant | ||
| Fluid balance (%) | Yes | 0.192 | 0.067 | 0.179 | 0.041 | -3.217 | 0.00129 |
| No | 0.100 | 0.094 | 0.090 | 0.090 | Difference is significant | ||
| PIM2 score# | Yes | 10.828 | 8.049 | 9.190 | 5.800 | -2.981 | 0.00287 |
| No | 5.353 | 6.127 | 2.665 | 5.597 | Difference is significant | ||
^Data failed “normality test.” Hence, Mann–Whitney U rank sum test applied. #Ordinal data. Hence, Mann–Whitney U rank sum test applied. SD: standard deviation; IQR: interquartile range.