Table 1.
Sociodemographic characteristics of the two groups.
| Variables | Non-severe withdrawal | Severe withdrawal | Statistics | p-value |
|---|---|---|---|---|
| Age, mean (SD) | 31.91 (8.94) | 33.57 (9.28) | t = 1.4 | 0.161 |
| Monthly income, mean (SD)a | 375.4 (618.1) | 763.2 (1848.1) | t = 2.3 | 0.018 |
| Ethnicity (%) | χ2 = 1.1 | 0.774 | ||
| Black | 59 (50.0) | 56 (52.3) | ||
| White | 47 (39.8) | 44 (41.1) | ||
| Mixed | 11 (9.3) | 6 (5.6) | ||
| Indigenous/Native | 1 (0.8) | 1 (0.9) | ||
| Marital status (%) | χ2 = 10.5 | 0.061 | ||
| Married | 8 (6.6) | 16 (14.4) | ||
| Stable union | 34 (27.9) | 29 (26.1) | ||
| Widow | 7 (5.7) | 6 (5.4) | ||
| Divorced | 7 (5.7) | 0 (0.0) | ||
| Separated | 31 (25.4) | 24 (21.6) | ||
| Single | 35 (28.7) | 36 (32.4) | ||
| Education level (%) | χ2 = 3 | 0.552 | ||
| None | 62 (52.5) | 58 (59.2) | ||
| Elementary school | 42 (35.6) | 30 (30.6) | ||
| High school | 13 (11.0) | 9 (9.2) | ||
| Graduation/Bachelor | 1 (0.8) | 0 (0.0) | ||
| Master or more | 0 (0.0) | 1 (1.0) | ||
| Alcohol regular use, mean (SD)b | 4.64 (7.84) | 3.73 (6.85) | t = 1.04 | 0.296 |
| Nicotine regular use, mean (SD)b | 15.03 (10.5) | 14.38 (10.07) | t = 0.5 | 0.597 |
| Cannabis regular use, mean (SD)b | 2.44 (4) | 3.19 (4.59) | t = 1.4 | 0.146 |
| Cocaine regular use, mean (SD)b | 6.16 (5.28) | 6.91 (5.07) | t = 1.2 | 0.226 |
| CSSA score first week, mean (SD) | 32.1 (18.1) | 48.3 (17.9) | t = 7.5 | <0.001 |
| CSSA score third week, mean (SD)c | 12.4 (5.6) | 42 (16.2) | t = 20.4 | <0.001 |
Note: CSSA - Cocaine Selective Severity Assessment; χ2 - chi-square test; t - independent samples t-test; SD - standard deviation; a - The Brazilian real was converted for the purpose of comparison with US dollars using the purchasing power parity function, as per The World Bank's data. b – Years of regular use (a minimum of three days of use per week for 12 months); c - Variable used to estimate the outcome of the study.