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Table 1 Baseline characteristics of participants

From: Disrupted brain network dynamics and cognitive functions in methamphetamine use disorder: insights from EEG microstates

 MA patients
(n = 55)
HC
(n = 27)
t value/χ2dfp
Male gender67.3%66.7%0.00 0.96
Mean age (SD)29.56 ± 4.9030.24 ± 6.55−0.53800.59
Education years8.81 ± 2.439.48 ± 2.34−1.19800.24
Drug use history
 Alcohol co-usea52.7%52.4%0.01 0.94
 Accumulated years of MA use (SD)5.00 ± 3.47   
MA use frequency
 Every day32.7%   
 3–5 days per week56.4%   
 1 day per week10.9%   
 1 day per month0   
MA use disorderc
 mild0   
 moderate16.4%   
 severe83.6%   
MA use dose (SD), gram0.68 ± 0.48   
Stroop task
 Reaction time of MA word755.86 ± 79.62738.22 ± 113.170.82800.42
 Reaction time of neutral word747.76 ± 80.44740.73 ± 113.750.32800.75
 Error rate of MA word0.08 ± 0.080.03 ± 0.023.19800.00**
 Error rate of neutral word0.07 ± 0.080.03 ± 0.032.51800.01*
Cogstate Battery
 TWOB (accuracy rate)1.01 ± 0.221.03 ± 0.22−0.38800.70
 GML (total error)60.84 ± 19.1047.81 ± 28.012.48800.02*
 ISL (total correct)20.56 ± 5.2323.10 ± 5.87−2.00800.05
 SEC (accuracy rate)0.92 ± 0.210.98 ± 0.24−1.16800.25
 CPAL (total error)92.08 ± 51.1052.86 ± 49.843.29800.00**
  1. aUse alcohol in the past 30 days before recruited
  2. bUse tobacco in the past 30 days before recruited
  3. cSeverity was diagnosed through DSM-5
  4. Abbreviations: MA, methamphetamine; HC, healthy controls; SD, standard deviation
  5. *p<0.05; **p<0.01