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Table 2 Participant characteristics and blood biomarkers by strain group. Means are reported with 95% confidence intervals in brackets

From: Acute effects of naturalistic THC vs. CBD use on recognition memory: a preliminary study

  Strain group t test
THC THC + CBD
N 15 16
Age 26.80 [24.13–30.07] 32.81 [26.37–43.94] ns
Gender (#F) 7 8
First age of regular cannabis use 16.15 [14.46–17.38]a 21.44 [18.37–31.69] ns
Cannabis days in past 30 days 25.15 [21.01–27.38] a 18.94 [14.68–23.00] *
Time away from the van 14.13 [10.87–19.44] 17.12 [14.06–21.50] ns
Cannabinoid content (mg)
CBD 0.84 [0.26–1.77] b 41.79 [25.71–79.28] **
THC 86.26 [57.87–124.37] b 20.06 [12.24–33.54] **
Total 163.79 [108.86–231.05] b 282.06 [200.95–415.31] ns
Blood plasma (ng/mL)
Pretest
  CBD 0.43 [0.16–0.95] 1.21 [0.68–2.56] ns
  THC 9.17 [5.11–16.44] 2.75 [1.53–4.30] *
  THC-COOH 67.50 [41.97–99.44] 41.78 [22.69–75.50] ns
  11-OH-THC 9.28 [5.36–17.22] 5.43 [2.80–9.74] ns
  Sum THC +metabolites 85.96 [54.27–131.35] 49.96 [27.33–85.11] ns
Posttest  
  CBD 1.15 [0.56–2.68] 35.25 [19.88–68.81] **
  THC 278.31 [144.75–684.41] 64.21 [36.46–109.80] ns
  THC-COOH 75.22 [49.04–111.51] 40.54 [23.04–62.59] ns
  11-OH-THC 6.27 [3.27–13.65] 3.12 [1.45–7.65] ns
  Sum THC + metabolites 359.79 [211.78–810.10] 107.87 [67.23–155.49] *
  1. The right column indicates significant differences from the t test (*: p < .05, **: p < .01)
  2. a indicates n = 13 because two THC participants did not complete the questionnaires
  3. b indicates n = 14 because one THC participant did not weigh her or his product