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Table 1 Demographics information and clinical data in ketamine users

From: Gender differences in subjective discontinuation symptoms associated with ketamine use

   Total Male Female P value
Age, years ± SD (range)   26.3 ± 5.4 (15-54) 26.5 ± 5.5 (15-54) 25.0 ± 4.3 (18-38) <0.001***
Gender, n (%)   1614 1353 (83.8%) 261(16.2%) <0.001***
Marriage status (%) Single 88.0 88.1 87.5 0.013*
Married 11.2 11.1 12.1
Others 0.8 0.8 0.4
Education, years ± SD   12.1 ± 2.3 12.2 ± 2.4 11.8 ± 2.1 0.056
Occupation On job, n (%) 1354 (83.9) 1143 (84.5) 211(80.7)  
Jobless, n (%) 252 (15.6) 202 (14.9) 50 (19.1)
Age of first ketamine use, years ± SD   22.1 ± 5.7 22.3 ± 5.8 21.2 ± 4.8 0.001**
Other substance use (%) Cigarette 72.4 73.9 64.8 0.002**
Alcohol 16.5 15.7 20.7 0.049*
Betel nut 15.8 18.4 2.3 <0.001***
Hypnotics 4.7 2.7 15.3 <0.001***
MDMA 4.4 4.1 5.7 0.246
Meth-amphetamine 1.6 1.4 2.7 0.133
Marijuana 1.5 1.6 1.1 0.622
Heroin 0.5 0.5 0.4 0.777
Glue 0.4 0.5 0.0 0.244
  1. P value: difference between genders.
  2. *p < 0.05, **p< 0.01, ***p< 0.001.