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AIMS: This study aimed to investigate body function and daily life activities 18 months after Covid-19 infection, depending on the initial severity of disease and according to sex.

METHODS: All 11,955 individuals on sick leave due to Covid-19 during the first wave of the pandemic in Sweden were invited to answer a questionnaire regarding experiencing negative changes in body function and daily life activities approximately 18 months after the start of sick leave. The analysis of data included descriptive statistics, group comparisons and multivariable binary logistic regressions (two groups).

RESULTS: Of 5464 responders (45.7%), 4676 (85.6%) reported experiencing at least one problem with body function, and the reported prevalence of problems with daily life activities was 46%. The most frequently reported problems were fatigue (66.3%), cognition, sleep and movement. In general, women and those initially hospitalised reported more problems. In the regression analyses, problems with body function could partly explain whether individuals experienced problems with daily life activities. However, only fatigue and movement significantly contributed throughout all groups (p<0.001). Furthermore, the odds ratios for fatigue were larger in regressions for women than for men.

CONCLUSIONS: In this nationwide study, more than 8 out of 10 individuals experienced problems with body function 18 months after being on sick leave due to Covid-19, with women and those initially hospitalised reporting more problems. Problems with body function, such as fatigue, could partly explain problems with daily life activities. However, the mechanisms behind the consequences are not yet clear and need to be further investigated.