Frequency and estimated costs of ten low-value practices in the Spanish primary care: a retrospective study.

Background: The frequency of low-value practices (LVPs) in the healthcare system is a worldwide challenge. This study aimed to evaluate the LVPs trend in Spanish primary care (PC), its frequency in both sexes, and estimate its related extra cost.

Methods: A multicentric, retrospective, and national research project was conducted. Ten LVPs highly frequent and potentially harmful for patients were analyzed (majority of them related to prescription). Algorithms were applied to collect the data from 28,872,851 episodes registered into national databases (2015-2017).

Results: LVPs registered a total of 7,160,952 (26.5%) episodes plus a total of 259,326 avoidable PSA screening tests. In adults, a high frequency was found for inadequate prescription of paracetamol antibiotics, and benzodiazepines . Women received more jeopardizing practices (p ≤ 0.001). Pediatrics presented a downward of antibiotic and paracetamol-ibuprofen prescription combination. The estimated extra cost was close to €292 million (2.8% of the total cost in PC).

Conclusion: LVPs reduction during the analyzed period was moderate compared to studies following 'Choosing Wisely list' of LVPs and must improve to reduce patient risk and the extra related costs.