Table 2 Distribution of study participants in relation to duration and amount of drug abuse and also in relation to drug abuse screening test
From: Impact of tramadol and heroin abuse on electroencephalography structure and cognitive functions
Tramadol group (n = 40) | Heroin group (n = 40) | P | |||
|---|---|---|---|---|---|
Duration of drug abuse in years | 5.85 ± 2.83 | 4.65 ± 3.61 | 0.102 | ||
Z | 1.774 | ||||
Amount of drug abuse gm/day | 4.20 ± 2.04 | 2.00 ± 1.56 | 0.001* | ||
Median | 5 | 3.75 | |||
Z | 3.409 | ||||
Drug abuse screening test (number of + ve items) | N | % | N | % | 0.791 |
More than 6 and less than 15 | 9 | 22.50 | 3 | 7.50 | |
15– | 20 | 50.00 | 24 | 60.00 | |
20– | 11 | 27.50 | 13 | 32.50 | |
Mean + SD | 17.80 ± 3.94 | 18.00 ± 2.68 | |||
Z | 0.395 | ||||