Long-term course and factors influencing work ability and return to work in post-COVID patients 12 months after inpatient rehabilitation

Table 4 Spearman correlation matrix with potential predictors for multivariate regression analysis at measurement time point T4

	WAI total	BMI	Age	PCS	6MWD	FIS total	HADS-D_Depression	SPSH	DSST 1	DSST 2	MVPA	PIA
WAI total	1.00
BMI	-0.09
Age	-0.08	0.04
PCS	-0.35***	0.08	-0.12
6MWD	0.46***	-0.36***	-0.21*	-0.33**
FIS total	-0.58***	0.07	-0.13	0.62***	-0.37***
HADS-D_Depression	-0.42***	0.24*	0.09	0.45***	-0.42***	0.59***
SPSH	0.52***	-0.11	-0.05	-0.51***	0.46***	-0.70***	-0.60***
DSST 1	0.30**	-0.24*	-0.35***	-0.20*	0.42***	-0.27**	-0.35***	0.32**
DSST 2	0.26**	-0.15	-0.32**	-0.13	0.45***	-0.34***	-0.34***	0.32**	0.56***
MVPA	0.20	0.01	-0.07	0.03	0.04	-0.13	-0.14	0.23*	-0.14	0.08
PIA	0.09	-0.06	0.13	0.01	0.10	-0.10	-0.08	0.10	0.11	0.02	-0.43***	1.00

* p ≤ 0.05, ** p ≤ 0.01, *** p < 0.001; WAI – Work ability index, BMI – Body-Mass-Index, PCS - Post-Covid Syndrome, 6MWD – six-minute-walking-distance, FIS - Fatigue Impact Scale, HADS-D_Depression - Hospital Anxiety and Depression Scale (subscale depression), SPSH - subjective perceived status of physical and mental health, DSST - Digit Symbol Substitution Test, MVPA - moderate to vigorous activity, PIA - physical inactivity

ISSN: 1745-6673