Table 3. Correlations of patients’ muscle pain and weakness, fatigue, body mass index (BMI), and age with 25(OH)D serum concentrations.

Variable	Mean	Correlation with 25(OH)D serum concentration a	95% confidence interval	p-value b
Muscle pain (VAS)	2.6 ± 3.2	-0.032	-0.080 to 0.016	0.19
Muscle weakness (VAS)	1.45 ± 2.7	-0.059	-0.107 to -0.011	0.02
Fatigue (VAS)	3.5 ± 3.3	-0.027	-0.074 to 0.021	0.28
BMI (kg/m2)	25.2 ± 5.0	-0.156	-0.202 to -0.108	< 0.001
Age (years)	56.1 ± 19.1	-0.028	-0.075 to 0.020	0.26

VAS, Visual analogue scale, BMI, body mass index;

^a Spearman’s rho,

^b Spearman’s rank test