A systematic review of involving patients in the planning and development of healthcare was conducted, analyzing 42 papers published between 1966 and 2000. The study found that involving patients led to changes in healthcare services, such as making services more accessible, producing information leaflets, and improving staff attitudes. However, there was no evidence of effects on patient satisfaction, health, or quality of life. Most studies were case studies, and the quality of evidence was limited due to the lack of standardized methods for evaluating case reports. The review highlighted that while involving patients contributed to service changes, the impact on patient outcomes remained unclear. The study also noted that involving patients can be challenging, with no consensus on the most effective methods. The findings suggest that involving patients is important for service development, but more research is needed to understand its effects on patient outcomes. The review emphasizes the need for further evidence to support the inclusion of patient perspectives in healthcare decision-making.A systematic review of involving patients in the planning and development of healthcare was conducted, analyzing 42 papers published between 1966 and 2000. The study found that involving patients led to changes in healthcare services, such as making services more accessible, producing information leaflets, and improving staff attitudes. However, there was no evidence of effects on patient satisfaction, health, or quality of life. Most studies were case studies, and the quality of evidence was limited due to the lack of standardized methods for evaluating case reports. The review highlighted that while involving patients contributed to service changes, the impact on patient outcomes remained unclear. The study also noted that involving patients can be challenging, with no consensus on the most effective methods. The findings suggest that involving patients is important for service development, but more research is needed to understand its effects on patient outcomes. The review emphasizes the need for further evidence to support the inclusion of patient perspectives in healthcare decision-making.