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Table 2 Relapse in substance use of adolescents after their index substance use during the follow-up period

From: Difference in long-term relapse rates between youths with ketamine use and those with stimulants use

Relapse after the index substance use

Ketamine group (N = 92)

Stimulants group (N = 43)

Statistic a

P-value

 No

60 (65.2)

17 (39.5)

7.888

0.005*

 Yes

32 (34.8)

26 (60.5)

Substance use in the relapse event

Ketamine group (N = 32)

Stimulants group (N = 26)

Statistic b

P-value

 Ketamine

21 (65.6)

4 (15.4)

14.764

0.042*

 Stimulants (MDMA or methamphetamine)

11 (34.4)

22 (84.6)

  1. aChi-square (χ2) test; b McNemar-Bowker Test; *p < 0.05