Table 2.
Over time changes in individual-level substance use and social network substance use and other characteristics.
| Baseline (before housing) | 3 months | 6 months | 12 months | |||||
|---|---|---|---|---|---|---|---|---|
| Total n | n (%) | Total n | n (%) | Total n | n (%) | Total n | n (%) | |
| Individual behavior | ||||||||
| Binge drinking | 421 | 67 (15.91) | 405 | 59 (14.57) | 400 | 67 (16.75) | 383 | 57 (14.88) |
| Marijuana | 421 | 112 (26.60) | 405 | 119 (29.38) | 400 | 130 (32.50) | 383 | 126 (32.90) |
| Illicit drugs | 421 | 78 (18.53) | 405 | 71 (17.53) | 400 | 58 (14.50) | 383 | 75 (19.58) |
| Network behavior (sum totals) | n | mean (SD) | n | mean (SD) | n | mean (SD) | n | mean (SD) |
| Drank alcohol to intoxication | 416 | 1.01 (1.91) | 400 | 1.04 (1.75) | 396 | 0.89 (1.49) | 380 | 0.87 (1.43) |
| Used marijuana | 413 | 0.98 (1.75) | 401 | 0.88 (1.61) | 396 | 0.86 (1.48) | 378 | 0.84 (1.49) |
| Used illicit drugs | 416 | 0.45 (1.47) | 401 | 0.35 (0.93) | 395 | 0.34 (0.91) | 378 | 0.36 (1.07) |
| Indicators of substance use with proximity and location met | ||||||||
| Marijuana users | ||||||||
| Met on street, do not live nearby | 413 | 0.15 (0.57) | 400 | 0.08 (0.32) | 395 | 0.05 (0.25) | 378 | 0.07 (0.38) |
| Not met on street, live nearby | 413 | 0.16 (0.59) | 400 | 0.25 (0.73) | 395 | 0.26 (0.73) | 378 | 0.29 (0.74) |
| Met on street and live nearby | 413 | 0.24 (0.86) | 400 | 0.12 (0.51) | 395 | 0.09 (0.38) | 378 | 0.05 (0.24) |
| Neither met on street nor live nearby | 413 | 0.42 (1.05) | 400 | 0.43 (1.08) | 395 | 0.46 (1.11) | 378 | 0.44 (1.03) |
| Illicit drug users | ||||||||
| Met on street, do not live nearby | 416 | 0.11 (0.53) | 400 | 0.04 (0.23) | 394 | 0.02 (0.19) | 378 | 0.03 (0.21) |
| Not met on street, live nearby | 416 | 0.05 (0.25) | 400 | 0.10 (0.43) | 394 | 0.13 (0.60) | 378 | 0.16 (0.61) |
| Met on street and live nearby | 416 | 0.17 (0.84) | 400 | 0.07 (0.44) | 394 | 0.06 (0.28) | 378 | 0.04 (0.27) |
| Neither met on street nor live nearby | 416 | 0.13 (0.66) | 400 | 0.14 (0.52) | 394 | 0.13 (0.53) | 378 | 0.14 (0.58) |
| Have used alcohol to intoxication | ||||||||
| Met on street, do not live nearby | 416 | 0.21 (0.73) | 399 | 0.12 (0.40) | 395 | 0.04 (0.22) | 380 | 0.06 (0.26) |
| Not met on street, live nearby | 416 | 0.14 (0.60) | 399 | 0.24 (0.65) | 395 | 0.26 (0.72) | 380 | 0.31 (0.78) |
| Met on street and live nearby | 416 | 0.22 (0.77) | 399 | 0.14 (0.60) | 395 | 0.11 (0.47) | 380 | 0.06 (0.25) |
| Neither met on street nor live nearby | 416 | 0.45 (1.22) | 399 | 0.54 (1.25) | 395 | 0.47 (1.07) | 380 | 0.45 (0.96) |
| Social support | ||||||||
| Alcohol to intoxication | ||||||||
| Use and provide support | 416 | 0.54 (1.21) | 400 | 0.57 (1.18) | 396 | 0.51 (1.09) | 377 | 0.52 (1.09) |
| Do not use and provide support | 416 | 4.24 (3.29) | 400 | 3.49 (2.98) | 396 | 3.37 (2.88) | 377 | 3.50 (3.15) |
| Illicit drug users | ||||||||
| Use and provide support | 416 | 0.19 (0.79) | 401 | 0.13 (0.46) | 395 | 0.15 (0.62) | 376 | 0.15 (0.64) |
| Do not use and provide support | 416 | 4.59 (3.46) | 401 | 3.90 (3.21) | 395 | 3.73 (3.04) | 376 | 3.86 (3.31) |
| Marijuana users | ||||||||
| Use and provide support | 413 | 0.58 (1.15) | 401 | 0.47 (1.01) | 396 | 0.48 (1.00) | 376 | 0.53 (1.18) |
| Do not use and provide support | 413 | 4.22 (3.23) | 401 | 3.57 (3.06) | 396 | 3.40 (2.88) | 376 | 3.49 (3.18) |
All models control for network size; bold cells are significantly different from baseline.
p < 0.05.