Table 3 Demographic characteristics of the HC and MS groups in experiment 2b (mean ± SD).

HC
(n = 37)
MS
(n = 30)
tPEffect size
(Cohen’s d)
Age (years)33.19 ± 6.3934.90 ± 7.06−1.0400.3020.254
Education (years)10.32 ± 1.899.53 ± 2.441.5360.1290.362
BAI25.81 ± 6.2427.66 ± 5.61−1.2460.2170.312
BDI9.24 ± 7.6416.93 ± 9.08−3.765<0.0010.916
PSQI5.08 ± 2.446.90 ± 3.00−2.7370.0080.666
BIS-1174.81 ± 21.2585.76 ± 16.13−2.3020.0250.580
Duration of current abstinence (days)NA58.83 ± 17.51*NANANA
Years of meth use before abstinenceNA7.07 ± 4.06NANANA
Dosage of meth use before abstinence (g/month)NA15.24 ± 11.48NANANA

*Because of the technical fault, only 18 meth abusers were recorded, but the duration of abstinence of others was around 3 months.