Diagnosis Delay of Diffuse Parenchymal Lung Disease and its Associated Factors - A Scoping Review

Diffuse parenchymal lung disease (DPLDs) has posed significant challenges to physicians, with diagnostic delay being among the most common issues. This study aims to comprehensively review the literature on the average time durations and reasons for the delay in diagnosis. A systematic literature search was conducted using the MEDLINE and Web of Sciences databases to identify relevant studies. A total of 13 studies were included in this scoping review. Most studies indicated that the median total diagnostic delay ranged from approximately 12 to 25 months. Several studies revealed a mean diagnostic delay ranging from 18 to 24 months. The common factors causing diagnosis delay in DPLDs can be categorised into three groups: patient, health provider and healthcare sector. Key findings reveal that diagnostic delays are most pronounced due to a lack of awareness and education, leading to prolonged time from symptom onset to definitive diagnosis and treatment. Increasing awareness and education among patients and healthcare providers, along with clear indicators that facilitate priority referrals, may expedite DPLDs diagnosis. By understanding the factors contributing to diagnostic delay, different strategies can be implemented and evaluated to further reduce the delay and improve patient prognosis.