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Table 2 Participant characteristics depending on lifetime CUD (dependence/abuse)

From: Habituation of the startle reflex depends on attention in cannabis users

Demographics Controls no CUD Cannabis users with CUD χ 2 (df) p two-tailed
N 7 11   
Male/Female 6/1 8/3 .42 (1) .518
Right/Left-handed 5/2 9/2 .27 (1) .605
  M ± SD (range) M ± SD (range) t (df) p two-tailed
Age (years) 34 ± 9 (18–43) 29 ± 8 (19–44) 1.23 (16) .238
IQ 104 ± 10 (86–115) 103 ± 10 (79–117) .25 (16) .809
Education (years) 13 ± 2 (10–14) 13 ± 2 (9–17) -.64 (16) .531
Alcohol/week (last 12 months) 3 ± 3 (0–10) 10 ± 8 (0–24) −2.53 (15) .023*
Cigarettes/day (last 12 months) 0 ± 0 (0–.1) 3 ± 1 (0–10) −2.42 (10) .036*
Coffee cup/day (last 12 months) 4 ± 1 (0–15) 2 ± 1 (0–10) .56 (16) .586
Duration of use (years) - 13 ± 8 (2–27)   
Age of first use (years) - 16 ± 3 (13–21)   
Last use (hours before testing) - 9 ± 5 (2–13)   
Urine cannabinoids (μg/l) - 692 ± 910 (0–2000)   
SDS score - 4 ± 2 (0–7)   
  1. Note. All controls were lifetime non-users of cannabis
  2. Abbreviations: CUD lifetime cannabis use disorder, df degrees of freedom, SDS Severity of (Cannabis) Dependence Scale (15 indicates maximum dependence on cannabis)
  3. *p < .05