. Author manuscript; available in PMC: 2014 Sep 1.

Published in final edited form as: Pain. 2013 Jun 5;154(9):1831–1839. doi: 10.1016/j.pain.2013.05.050

Table 2.

Pearson correlations among the neonatal variables of the preterm infants

	Illness severity on day 1	Neonatal pain (Number of skin breaks)	Days on mechanical ventilation	Total morphine exposure
Gestational age group	−0.59^***	−0.77^***	−0.64^***	−0.39^***
Illness severity on day 1	–	0.58^***	0.51^***	0.28^***
Neonatal pain (Number of skin breaks)	–	–	0.80^***	0.52^***
Days on mechanical ventilation	–	–	–	0.77^***

^***

P < 0.001

Gestational age group (24–28 weeks gestational age or 29–32 weeks gestational age)