Baseline testing | 12-month follow-up | ||||
---|---|---|---|---|---|
Meth group (n=10) | Meth-cann group (n=10) | Control group (n=20) | Meth group (n=9) | Control group (n=10) | |
Attention (α=0.74) | −0.25 (0.63) | −0.43 (0.61) | 0.19 (0.75) | 0.02 (0.22) | 0.25 (0.20) |
CCTT | |||||
Trial 1 time | 25.50 (10.63) | 25.10 (10.38) | 19.55 (6.59) | 19.11 (6.92) | 18.90 (7.53) |
Trial 2 time | 48.40 (13.12) | 53.10 (16.46) | 43.65 (12.21) | 42.44 (8.97) | 40.60 (13.25) |
CMS | |||||
Numbers forward | 6.90 (1.52) | 8.00 (1.05) | 7.85 (1.57) | 7.11 (1.54) | 7.90 (1.52) |
Numbers backward | 3.60 (0.70) | 3.10 (0.99) | 4.50 (1.54) | 3.56 (1.59) | 4.30 (0.82) |
AVLT Trial 1 | 7.40 (1.96) | 6.00 (1.41) | 6.95 (1.96) | 8.00 (2.24) | 7.10 (1.66) |
WASI Vocabulary subtest | 25.20 (10.30) | 26.60 (6.85) | 33.15 (8.45) | 29.33 (12.34) | 29.50 (4.88) |
WASI Similarities subtest | 18.20 (6.46) | 19.60 (6.87) | 22.60 (7.18) | 22.11 (8.43) | 22.30 (4.64) |
Non-verbal reasoning (α=0.78) | −0.26 (0.92) | −0.47 (0.61) | 0.34 (0.80) | 0.05 (0.30) | 0.07 (0.25) |
WASI Block Design subtest | 22.80 (10.29) | 22.40 (10.76) | 31.00 (11.74) | 28.00 (14.93) | 26.30 (12.13) |
WASI Matrix Reasoning subtest | 15.80 (6.63) | 13.40 (4.38) | 19.05 (5.05) | 17.67 (8.00) | 16.80 (6.78) |
Verbal memory (α=0.86) | 0.20 (0.99) | −0.60 (0.88) | 0.08 (0.52) | −0.25 (0.26) | 0.49 (0.24) |
AVLT | |||||
Immediate recall | 10.00 (1.33) | 8.30 (2.58) | 10.45 (1.93) | 9.11 (2.57) | 10.90 (1.85) |
Delayed recall | 9.80 (2.04) | 7.90 (3.04) | 10.30 (1.90) | 9.44 (3.50) | 11.50 (1.96) |
Long-term per cent retention | 94.91 (31.34) | 76.61 (18.12) | 87.19 (11.11) | 84.01 (24.48) | 100.95 (23.70) |
Visual memory (α=0.79) | −0.14 (0.72) | −0.13 (0.62) | −0.02 (0.81) | 0.29 (0.25) | 0.09 (0.23) |
ROCF | |||||
Immediate recall | 19.25 (6.51) | 18.00 (8.01) | 17.28 (7.29) | 19.33 (6.51) | 19.60 (4.20) |
Delayed recall | 18.45 (5.90) | 17.55 (7.58) | 17.68 (7.73) | 19.22 (6.18) | 19.00 (4.73) |
CMS Dots | |||||
Trials 1–3 | 17.30 (3.13) | 16.90 (1.97) | 18.10 (3.82) | 20.22 (3.63) | 18.50 (3.57) |
Immediate recall | 5.50 (1.78) | 6.00 (1.63) | 6.10 (1.68) | 6.33 (1.94) | 6.00 (2.06) |
Delayed recall | 5.40 (1.58) | 5.80 (1.69) | 6.20 (1.64) | 6.56 (1.88) | 5.80 (1.99) |
Verbal generativity (α=0.59) | −0.38 (1.04) | −0.06 (0.57) | 0.23 (0.72) | 0.17 (0.29) | 0.03 (0.25) |
Phonemic fluency: total words | 24.40 (9.68) | 29.00 (4.76) | 28.55 (6.58) | 29.56 (12.47) | 24.10 (10.73) |
Semantic fluency: total words | 13.30 (4.24) | 13.70 (2.58) | 15.75 (3.04) | 14.56 (3.05) | 15.10 (3.11) |
Planning (α=0.73) | −0.13 (0.66) | −0.47 (0.76) | 0.22 (0.66) | 0.05 (0.21) | 0.13 (0.20) |
ROCF copy | 30.40 (4.19) | 29.15 (5.19) | 31.48 (2.77) | 30.17 (4.57) | 30.55 (3.02) |
Tower of London | |||||
Total correct score | 3.40 (1.51) | 2.80 (1.40) | 3.30 (1.38) | 3.89 (1.45) | 3.50 (1.35) |
Total moves score | 33.90 (16.29) | 39.50 (13.82) | 26.65 (12.36) | 29.00 (11.74) | 25.20 (8.27) |
Self-monitoring | −0.71 (0.84) | −0.56 (0.99) | 0.63 (0.40) | −0.72 (0.23) | 0.68 (0.21) |
CCTT total errors | 0.60 (0.97) | 1.10 (0.99) | 0.65 (0.81) | 0.89 (1.05) | 0.80 (1.03) |
Phonemic fluency errors | 3.60 (4.86) | 1.60 (0.97) | 0.80 (1.06) | 2.78 (3.49) | 0.90 (1.10) |
Semantic fluency errors | 0.40 (0.70) | 0.10 (0.32) | 0.25 (0.55) | 0.33 (0.50) | 0.20 (0.42) |
Tower of London total errors | 2.20 (3.10) | 3.20 (3.16) | 0.50 (1.10) | 2.22 (5.89) | 0.30 (0.48) |
Means are presented with SEs in parentheses.
AVLT, Auditory Verbal Learning Test; CCTT, Children's Color Trails Test Meth-cann group; CMS, Children's Memory Scale; Methamphetamine and cannabis group; Meth group, Methamphetamine only group; ROCH, Rey-Osterrieth Complex Figure; WASI, Wechsler Abbreviated Scale of Intelligence.