Table 3. Pearson’s correlation coefficients of neuropeptides with smokers.

Parameters	Correlation coefficient
	Cigarettes per day	Smoking period
Food intake	−0.100	−0.237*
Adiponectin	−0.181	0.029
BDNF	0.044	0.251
Leptin	0.226*	−0.066

*p < 0.05. BDNF, brain-derived neurotrophic factor.