Table 1 Demographics information and clinical data in ketamine users

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