Skip to main content

Table 2 Demographic characteristics and ketamine-using history of the RDS-sample in Taipei Metropolitan Area (N = 1115), by illicit drug use experience

From: Mis-anaesthetized society: expectancies and recreational use of ketamine in Taiwan

Variables

Illicit drug-naïve

(Group 1; N = 840)

Exclusive ketamine use

(Group 2; N = 30)

Polydrug ketamine use

(Group 3; N = 132)

The other illicit drug use

(Group 4; N = 113)

Group comparisons

N

%wt

95% CI

N

%wt

95% CI

N

%wt

95% CI

N

%wt

95% CI

Pc

Post-hocd

Male

504

55.4

(49.3–62.0)

10

63.2

(37.6–86.4)

44

59.7

(45.9–73.8)

36

64.5

(50.2–79.6)

.160

–

Education < college

513

65.9

(60.0–71.5)

23

83.0

(63.2–96.8)

94

71.3

(57.6–82.5)

71

69.6

(55.6–81.6)

.141

–

Unemployment

39

5.8

(3.4–8.4)

3

10.8

(0.0–29.0)

16

14.5

(3.7–28.5)

21

22.6

(7.8–39.6)

< .001

3, 4 > 1

Early-onseta tobacco use

265

26.7

(22.0–30.9)

17

61.8

(38.2–85.9)

72

47.5

(35.7–62.1)

52

52.5

(37.1–63.8)

<.001

2, 3, 4 > 1

Early-onseta alcohol useb

290

29.8

(25.4–34.9)

15

47.9

(23.7–74.4)

64

45.8

(33.5–58.8)

58

57.6

(43.4–70.0)

<.001

3, 4 > 1

 

N

Mean

SD

N

Mean

SD

N

Mean

SD

N

Mean

SD

Pc

Post-hocd

Age in years

840

28.1

8.2

30

21.8

3.6

132

26.0

5.5

113

30.1

7.6

< .001

1 > 2, 3; 4 > 3 > 2

Age at first tobacco use

772

17.1

3.7

29

14.6

2.1

129

15.4

3.3

110

15.6

3.0

< .001

1 > 2, 3, 4

Age at first alcohol use

766

16.0

4.1

29

14.9

3.1

130

14.6

3.5

109

15.2

3.9

< .001

1 > 3

  1. aAn onset use age of < 16 years, which is the end of compulsory education up to middle school, is defined as early–onset use
  2. bThree individuals were missing on the information on onset age of alcohol use
  3. cχ2 test or Fisher’s exact test for categorical variables; ANOVA for quantitative variables
  4. dTukey’s HSD test in ANOVA; a Tukey-type multiple comparison for proportions in a 2*4 cross-tabulation for categorical variables (Elliott and Reisch 2006)