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. 2011 May 15;2:89–102. doi: 10.2147/SAR.S14871

Table 2.

TC frequency distribution

Drugs
TOB ALC MAR HAL PRP COC CRK HER AMP MET
TC frequency distribution (in %)
0 9.8 6.5 4.3 40.2 40.2 12.0 19.6 34.8 54.4 58.7
1 56.5 23.9 13.0 1.1 6.5 6.5 18.5 8.7 1.1 3.3
2 8.7 26.1 39.1 42.4 22.8 37.0 25.0 18.5 34.8 18.5
3 16.3 12.0 14.1 0.0 4.3 4.3 9.8 5.4 0.0 8.7
4 3.3 10.9 17.4 13.0 12.0 23.9 14.1 17.4 7.6 7.6
5 3.3 7.6 2.2 0.0 6.5 3.3 6.5 3.3 0.0 1.1
6 0.0 3.3 4.3 3.3 2.2 8.7 3.3 7.6 1.1 2.2
7 2.2 5.4 1.1 0.0 3.3 0.0 1.1 2.2 0.0 0.0
8 0.0 1.1 1.1 0.0 2.2 3.3 1.1 2.2 0.0 0.0
9 0.0 1.1 1.1 0.0 0.0 0.0 1.1 0.0 0.0 0.0
10 0.0 1.1 1.1 0.0 0.0 1.1 0.0 0.0 1.1 0.0
11 0.0 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 0.0 0.0 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Abbreviations: TOB, tobacco; ALC, alcohol; MAR, marijuana; HAL, hallucinogens; PRP, prescription pill misuse; COC, cocaine; CRK, crack cocaine; HER, heroin; AMP, amphetamine; MET, methamphetamine; TC, transition count.