Determining the structure of acute pain responses in vulnerable neonates.

The primary purpose was to determine the underlying structure of the vulnerable infant's response to an acute painful procedure. The secondary purpose was to explore the influence of context (e.g., risk for neurological impairment [NI] and gestational age [GA]). A descriptive cohort design determined contributions of selected indicators to the structure of infant pain. The magnitude of variance for 19 pain indicators was assessed using 3 …