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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