Table 2.
Sample characteristics of IDUs with drug-using networks, STEP study (n = 818)
| Characteristics | Injection risk network structure |
Test statistica | |||
|---|---|---|---|---|---|
| Non-sharing drug users (Group 1) | Cooker sharer(s) (Group 2) | One needle sharer (Group 3) | Multiple needle sharers (Group 4) | ||
| (n = 243) | (n = 175) | (n = 179) | (n = 221) | ||
| Gender: male | 152 (63) | 125 (71) | 107 (60) | 134 (61) | 6.67 |
| Race: African-American | 206 (85) | 151 (86) | 140 (78) | 155 (70) | 21.30** |
| Age: 43 or younger | 121 (50) | 64 (37) | 103 (58) | 123 (56) | 19.51** |
| Married or in a committed relationship | 65 (27) | 47 (27) | 69 (39) | 56 (25) | 10.36* |
| High school diploma or GED | 144 (59) | 100 (57) | 105 (59) | 127 (57) | 0.26 |
| Unemployed in past 6 months | 219 (90) | 161 (92) | 163 (91) | 205 (93) | 1.13 |
| Imprisoned in past 6 months | 49 (20) | 54 (31) | 57 (32) | 78 (35) | 14.42* |
| Homeless in past 6 months | 70 (29) | 58 (33) | 71 (40) | 106 (48) | 19.97* |
| HIV positive (self-report) | 25 (10) | 36 (21) | 32 (19) | 33 (16) | 10.65** |
| Snorted or sniffed heroin in past 6 monthsb | 135 (56) | 62 (35) | 79 (44) | 98 (44) | 17.23** |
| Snorted or sniffed cocaine in past 6 monthsc | 74 (31) | 34 (19) | 30 (17) | 59 (27) | 13.61** |
| Smoked crack in past 6 months | 152 (63) | 93 (53) | 131 (73) | 158 (71) | 20.87** |
| Attended shooting gallery in past 6 months | 68 (28) | 50 (29) | 62 (35) | 108 (49) | 27.04** |
| Total network size [mean (SD)]e | 8.6 (4.1) | 8.3 (3.5) | 8.0 (3.8) | 9.8 (4.0) | 9.03** |
| Density [mean(SD)]d,e | 0.5 (0.3) | 0.5 (0.3) | 0.5 (0.3) | 0.5 (0.3) | 0.16 |
| No. of active drug users [mean (SD)]e | 4.1 (2.8) | 4.4 (2.5) | 4.2 (2.6) | 5.7 (2.7) | 16.99** |
a
3 degrees of freedom for all test statistics,
b
1 missing,
c
3 missing,
d
4 missing,
e
ANOVA F-tests, all other used Chi-squared test statistics
*
P < 0.05;
**
P < 0.01