Long-term Health-related Quality of Life and Physical Function of COVID-19 Survivors with ICU-acquired Weakness

Abstract

Objectives: This study examined the long-term health-related quality of life (HRQOL) and physical function of coronavirus 2019 (COVID-19) survivors diagnosed with intensive care unit-acquired weakness (ICU-AW). The correlation between muscle weakness at ICU discharge and HRQOL was assessed. Methods: A retrospective study was conducted on COVID-19 patients admitted to the ICU at Hyogo Medical University Hospital between January 2021 and November 2021. The HRQOL was evaluated using the SF-36 questionnaire, and physical function, including muscle strength assessed by the Medical Research Council Sum Score (MRC-SS), grip strength, and the 6-min walk distance (6MWD), were assessed 18 months after the onset. ICU-AW was diagnosed in patients with an MRC-SS of less than 48 at ICU discharge. We investigated the correlations between the MRC-SS at ICU discharge and the long-term clinical outcomes. Results: We included 26 patients, with 13 having ICU-AW. In the long-term follow-up, the ICU-AW group had significantly lower scores than the no ICU-AW group in the SF-36 subscales such as Physical Functioning (PF), Role Limitation-Physical (RP), Bodily Pain (BP), Vitality (VT), Social Functioning (SF), and Role Limitation-Emotional (RE), as well as in the Physical Component Summary Score (PCS). The muscle strength was also decreased in the ICU-AW group. The MRC-SS at ICU discharge was positively correlated with PF, RP, BP, SF, RE, and PCS in SF-36 at the 18-month follow-up. Conclusions: COVID-19 survivors with ICU-AW experienced a long-term decline in HRQOL, and muscle weakness at ICU discharge was correlated with the long-term HRQOL.