Key points are not available for this paper at this time.
Editor's note: This is the first article in a new series on clinical research by nurses. The series is designed to give nurses the knowledge and skills they need to participate in research, step by step. Each column will present the concepts that underpin evidence-based practice-from research design to data interpretation. The articles will also be accompanied by a podcast offering more insight and context from the author.
Bernadette Capili (Thu,) studied this question.