Table 5.

Spearman correlation coefficients for the relationships between fitness parameters and severity of fatigue as measured with the Fatigue Severity Scale (FSS) and the Visual Analogue Scale (VAS) in 18 liver transplant recipients

Physical fitness	Fatigue
	FSS		VAS
	Rs	P	Rs	P
Cardiorespiratory fitness
VO2peak (ml kg−1 min−1)	−0.40	0.10	−0.52	0.03*
% of sedentary norm	−0.17	0.50	−0.42.	0.08†
% of recreational norm	−0.32	0.20	−0.53	0.03*
VO2peak (ml kg−1FFM min−1)a	−0.43	0.08†	−0.51	0.04*
% of sedentary norma	−0.35	0.17	−0.50	0.04*
% of recreational norma	−0.45	0.07†	−0.61	0.01*
VAT (% predicted VO2peak sed)	0.22	0.38	0.03	0.92
VAT (% predicted VO2peak recr)	0.17	0.49	−0.06	0.82
6MWD (m)	−0.44	0.07†	−0.53	0.03*
% of norm	−0.25	0.32	−0.52	0.03*
Neuromuscular fitness
PT extension at 60°/s (Nm)	−0.39	0.11	−0.31	0.22
% of norm	−0.15	0.56	−0.28	0.27
PT extension at 180°/s (Nm)	−0.30	0.22	−0.12	0.64
% of norm	0.02	0.93	0.04	0.87
Body composition
Body mass index (kg m−2)	0.03	0.91	0.06	0.82
Waist circumference (cm)b	−0.07	0.82	−0.06	0.83
Body fat (%)a	0.32	0.21	0.15	0.58

Abbreviations: VO₂peak (ml kg⁻¹ min⁻¹), peak oxygen uptake per kg; VO₂peak (ml kg⁻¹_FFM min⁻¹), peak oxygen uptake per kg fat-free mass; VAT (% predicted VO_2peak), ventilatory anaerobic threshold as percentage of predicted VO₂peak; sed, sedentary normative values; recr, recreational normative values (people who exercise no more than 1–2 h a week); 6MWD, 6-min walk distance; PT, peak torque

^an = 17, because the thickness of the subscapular skinfold could not be measured reliably in one patient

^bn = 14, because of thickness of the skin at the place of the cicatrice in four patients

* Significant (P ≤ 0.05) correlation

^† Correlation at the α = 0.10 level (trend)