Table 5.

Correlations between metabolic parameters and general characteristics of healthy volunteers

	l-Arginine	l-Citrulline	ADMA	SDMA	DMA	l-Arginine: ADMA
Age	r = − 0.052	r = − 0.188	r = − 0.124	r = − 0.155	r = − 0.274*	r = − 0.013
BMI	r = − 0.079	r = 0.066	r = − 0.077	r = 0.055	r = 0.168	r = − 0.067
Waist circumference	r = − 0.065	r = 0.073	r = − 0.172	r = 0.298	r = 0.208	r = 0.014
FTND score	r = 0.139	r = − 0.044	r = 0.051	r = − 0.055	r = − 0.130	r = 0.109
Pack-year index	r = 0.156	r = − 0.071	r = 0.029	r = − 0.084	r = − 0.098	r = 0.144

*p = 0.025; statistical significance for remaining correlation coefficients was not reached

FTND Fagerström test for nicotine dependence