Cost-effectiveness and return-on-investment of C-reactive protein point-of-care testing in comparison with usual care to reduce antibiotic prescribing for lower respiratory tract infections in nursing homes: a cluster randomised trial.

Objectives: C-reactive protein point-of-care testing (CRP POCT) is a promising diagnostic tool to guide antibiotic prescribing for lower respiratory tract infections (LRTI) in nursing home residents. This study aimed to evaluate cost-effectiveness and return-on-investment (ROI) of CRP POCT compared with usual care for nursing home residents with suspected LRTI from a healthcare perspective.
Design: Economic evaluation alongside a cluster randomised, controlled trial.
Setting: 11 Dutch nursing homes.
Participants: 241 nursing home residents with a newly suspected LRTI.
Intervention: Nursing home access to CRP POCT (POCT-guided care) was compared with usual care without CRP POCT (usual care).
Main Outcome Measures: The primary outcome measure for the cost-effectiveness analysis was antibiotic prescribing at initial consultation, and the secondary outcome was full recovery at 3 weeks. ROI analyses included intervention costs, and benefits related to antibiotic prescribing. Three ROI metrics were calculated: Net Benefits, Benefit-Cost-Ratio and Return-On-Investment.
Results: In POCT-guided care, total costs were on average €32 higher per patient, the proportion of avoided antibiotic prescribing was higher (0.47 vs 0.18; 0.30, 95% CI 0.17 to 0.42) and the proportion of fully recovered patients statistically non-significantly lower (0.86 vs 0.91; -0.05, 95% CI -0.14 to 0.05) compared with usual care. On average, an avoided antibiotic prescription was associated with an investment of €137 in POCT-guided care compared with usual care. Sensitivity analyses showed that results were relatively robust. Taking the ROI metrics together, the probability of financial return was 0.65.
Conclusion: POCT-guided care effectively reduces antibiotic prescribing compared with usual care without significant effects on recovery rates, but requires an investment. Future studies should take into account potential beneficial effects of POCT-guided care on costs and health outcomes related to antibiotic resistance.
Trial Registration Number: NL5054.
Competing Interests: Competing interests: The authors declare: LWvB, TMB, MEA, JB and CMPMH report a grant from The Netherlands Organisation for Health Research and Development (ZonMw), for the conduct of the current study. RH receives no support from any organisation for the submitted work. MWvT reports grants from The Netherlands Organisation for Health Research and Development (ZonMw), outside the submitted work. TJMV reports grants from Abbott, Becton Dickinson, Biomerieux, European Commission; grants from European Commission, Orion, during the conduct of the study; grants from European Commission, Janssen Pharmaceuticals; and grants from ZonMw, outside the submitted work.
(© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)