Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…on school nurses (n = 167) and their preparedness to teach within the context of sexual health care revealed that although over 75% of the participants were involved in the provision of sex education, over half expressed the need for further development and education in this area (McFayden 2004).
Category: