Table 2.

Association between BDNF and NGF concentration and clinical situation of ketamine use.

	BDNF(ng/ml)	NGF(ng/ml)
Gender	−0.131	0.08
Age	−0.069	0.078
Education	−0.036	0.089
Age of first ketamine use	−0.055	0.066
Duration of ketamine usea	−0.154	−0.005
Duration of dependenceb	−0.041*	−0.071
Current frequency of ketamine usec	−0.209	−0.112
Current average doses of ketamine consumption	−0.2	−0.109
Days since last used	0.087	0.038
Alcohol consumption	−0.008	0.028
Tobacco smoking	0.047	0.188

^aTotal months of ketamine use from the first time till now.

^bTotal months of ketamine use from beginning to depended till now.

^cFrequency of ketamine use in recent one month.

^dDays of blood drawing since last ketamine use.

^*p value < 0.05.