LIL. d. A finding from this study are particularly important for nurses who interact with informal caregivers, is that a significant negative correlation exists between caregiver perceived stress and caregiver mental health ranking. 23. Which statements below, as reported by the author, would be considered a limitation of the study? (Select all that apply) a. The study population included a convenience sample of informal caregivers who were receiving some level of caregiving support from an agency that provided end-of-life supportive services. b. Health care providers must recognize the importance of caregiver self-efficacy