Table 3.
Odds ratios (OR), adjusted odds ratios (aOR) and 95% confidence intervals (CI) of harms (HIV, current HCV, overdose and SSTI) when reporting public injecting in the last 6 months in Scotland, 2017–18.
| a) HIV risk modelc,d | Totala, N | HIV infection (% of N)b | HIV infection (n = 1375; 42 positive) | |||
| OR (95% CI) | p-value | aOR (95% CI) | p-value | |||
| Reported public injecting | ||||||
| No | 1135 | 25 (2) | 1 | <0.001 | 1 | 0.019 |
| Yes | 227 | 17 (7) | 3.59 (1.91 to 6.77) | 2.11 (1.13 to 3.92) | ||
| b) Current HCV risk modelc,e | Totala, N | Current HCV infection (% of N)b | Current HCV infection (n = 1376; 804 positive) | |||
| OR (95% CI) | p-value | aOR (95% CI) | p-value | |||
| Reported public injecting | ||||||
| No | 1032 | 303 (29) | 1 | <0.001 | 1 | 0.043 |
| Yes | 210 | 99 (47) | 2.14 (1.58 to 2.91) | 1.49 (1.01 to 2.19) | ||
| c) Overdose risk modelc,f | Totala, N | Overdosed in last year (% of N)b | Overdosed in last year (n = 1437; 265 overdose) | |||
| OR (95% CI) | p-value | aOR (95% CI) | p-value | |||
| Reported public injecting | ||||||
| No | 1201 | 186 (15) | 1 | <0.001 | 1 | <0.001 |
| Yes | 233 | 78 (33) | 2.75 (2.01 to 3.76) | 1.59 (1.27 to 2.01) | ||
| d) SSTI risk modelc,g | Totala, N | SSTI in the last year (% of N)b | SSTI in last year (n = 1456; 402 SST) | |||
| OR (95% CI) | p-value | aOR (95% CI) | p-value | |||
| Reported public injecting | ||||||
| No | 1216 | 314 (26) | 1 | 0.001 | 1 | <0.001 |
| Yes | 237 | 87 (37) | 1.67 (1.24 to 2.23) | 1.42 (1.17 to 1.73) | ||
Excludes missing data.
May not add up due to missing data.
A multi-level framework was applied to each model to adjust for recruitment region, across the 11 NHS board areas. To account for clustering as a result of the HIV outbreak in Glasgow, for the HIV model the multi-level framework was collapsed into NHS Greater Glasgow and Clyde vs. Rest of Scotland.
Adjusted for age, sex, homelessness and cocaine injecting.
Adjusted for age, sex, homelessness, cocaine injecting, injection frequency and alcohol consumption (>14 units per week).
Adjusted for age, sex, homelessness, cocaine injecting, injection frequency and alcohol consumption (>14 units per week).
Adjusted for age, sex, homelessness, injecting heroin and cocaine at the same time and injection frequency.