Reverse shock index multiplied by simplified motor score as a predictor of clinical outcomes for patients with COVID-19.

"Declarations Ethics approval and consent to participateThis study was approved by the Institutional Review Board of Taipei Tzu Chi Hospital and was conducted in accordance with the Declaration of Helsinki (approval number: 10-XD-074, 10-XD-080, 10-XD-151). This was an observational study that did not involve additional interventions in the usual care of patients. Therefore, the requirement for informed consent was waived by the Institutional Review Board of Taipei Tzu Chi Hospital. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was supported by grants from Taipei Tzu Chi Hospital (TCRD-TPE-113-RT-4, TCRD-TPE-113–19, TCRD-TPE-112–43, and TCRD-TPE-111–46)."