Table 3.

Correlation matrix of methamphetamine use duration, social support rating scale and twenty–item Toronto alexithymia scale scores of the methamphetamine-dependent patients (Mean ± SD).

Variable	Mean SD	Duration of MA use
		Pearson correlation	Partial correlation controlling with age
Duration of MA use	8.05 ± 3.84	1.00	1.00
TAS total score	54.61 ± 8.09	0.18	0.21*
DIF	18.84 ± 4.67	0.24*	0.27**
DDF	14.14± 2.63	0.08	0.08
EOT	21.63 ± 3.50	0.03	0.06
SS total	35.09 ± 7.03	−0.30**	−0.33***
Subjective support	20.96 ± 5.14	−0.30**	−0.35***
Objective support	7.75 ± 2.81	−0.04	−0.04
Support availability	6.37 ± 1.74	−0.25**	−0.21*

^*P < 0.05,

^**P < 0.01,

^***P < 0.001; MA, Methamphetamine; TAS, Toronto alexithymia scale; DIF, Difficulties identifying feelings; DDF, Difficulties describing feelings; EOT, Externally oriented thinking; SS, Social support.