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Pearson correlations among neonatal variables for the preterm children.
| Neonatal predictors | Skin-breaking procedures (pain-related stress) | Early illness severity (SNAP-II on day 1) | Mechanical ventilation (days) | Number of surgeries |
|---|---|---|---|---|
| Early illness severity (SNAP-II on day 1) | .44** | |||
| Mechanical ventilation (days) | .74*** | .42** | ||
| Number of surgeries | .41** | .36* | .40** | |
| Cumulative morphine | .57** | .40** | .75*** | .648*** |
P value < .01;
P value < .001;
P value < .0001.
