Caregiver burden, anxiety, and quality-of-life among informal caregivers of patient with head and neck cancer: a systematic review.

This large-scale, multicentre cross-sectional investigation encompasses primary, secondary and tertiary healthcare institutions, various specialties and various age groups, with strong geographical and institutional representativeness. Workplace violence and hospital attitude perceptions were measured using self-reported questionnaires, which may introduce recall and social desirability biases. The cross-sectional design precludes causal inference.