Table 2.

Correlation analysis between variables in cigarette smokers

Parameter	Smokers	p value
Cortisol/tryptophan	r = −0.386	p < 0.001
Cortisol/MAO-B	r = −0.264	p < 0.001
Cortisol/testosterone	r = 0.428	p < 0.001
Cortisol/serotonin	r = −0.671	p < 0.016
Testosterone/MAO-B	r = −0.315	p < 0.01
Testosterone/serotonin	r = −0.419	p < 0.001
T3/serotonin	r = −0.541	p < 0.017
T3/MAO-B	r = −0.398	p < 0.014
T4/serotonin	r = 0.454	p < 0.018
T4/MAO-B	r = 0.369	p < 0.011

Pearson correlation analysis was performed between variables. Student paired ‘t test’ was used to find out statistical significance