Which of the following methods would be best if the nurse wanted to study the complex relationships among factors that contribute to chronic disease?

This tool helps in assessing the severity of withdrawal symptoms in infants who were exposed to opioids during pregnancy. Based on the Finnegan score, the nurse can implement appropriate interventions to manage the symptoms and prevent complications. While offering the infant a pacifier with a drop of mom's breast milk or tightly swaddling the infant may be helpful for soothing the infant, these interventions may not directly address the underlying hyperreflexia associated with opioid withdrawal. Placing the infant under a radiant warmer is not indicated for managing hyperreflexia.

After a forceps-assisted birth, the infant should be assessed for signs of trauma or injury, such as bruising, facial nerve injury, or skull fractures. This assessment should be done immediately after the birth to ensure prompt recognition and management of any issues.

Option A is incorrect because measuring the circumference of the infant's head can be done after the assessment for trauma has been completed and any issues have been addressed.
Option B is incorrect because applying a cold pack to the infant's scalp is not a standard nursing intervention after a forceps-assisted birth.
Option D is incorrect because prophylactic antibiotics are not routinely administered to infants after a forceps-assisted birth unless there is a specific indication, such as suspected infection.