Table 1.
Demographic and epidemiological characteristics of the Bulgarian study population.
| Characteristics | Genotyped HIV-1-infected PWIDs | Registered HIV-1-infected PWIDs | Registered HIV-1-infected non-PWIDs | p-Valuea | p-Valueb | |
|---|---|---|---|---|---|---|
| Number of patients | 117 | 359 | 1087 | – | – | |
| Male | 107 (91.5) | 319 (88.9) | 766 (70.4) | ns | p < 0.0001 | |
| Female | 10 (8.5) | 40 (11.1) | 321 (29.5) | ns | p < 0.0001 | |
| Age (years) ≤ 19 | 15 (12.8) | 40 (11.1) | 56 (5.1) | ns | p < 0.001 | |
| Age (years) ≥ 20 | 102 (87.2) | 319 (87.5) | 1032 (94.9) | ns | p < 0.001 | |
| HCV co-infection | 103/112 (92.0) | 189/204 (92.6) | 56/406 (13.8) | ns | p < 0.0001 | |
| HBV co-infection | 15/81 (18.5) | 31/183 (16.9) | 37/399 (9.7) | ns | ns | |
| Most likely infected in Bulgaria | 113 (96.6) | 346 (96.4) | 875 (80.5) | ns | p < 0.0001 | |
| Most likely infected abroad | Immigrants | 0 | 2 (0.6) | ns | ns | ns |
| Bulgarian nationals | 4 (3.4) | 11 (3.1) | 179 (16.5) | ns | p < 0.0001 | |
| Sofia | 42 (35.9) | 119 (33.1) | 430 (39.5) | ns | ns | |
| Plovdiv | 59 (50.4) | 166 (46.2) | 93 (8.5) | ns | p < 0.0001 | |
| Other cities | 16 (13.7) | 74 (20.6) | 555 (51.1) | ns | p < 0.0001 | |
| Roma (Gypsy) | 41 (35.0) | 143 (39.8) | 34 (2.1) | ns | p < 0.0001 | |
| Patients who reported imprisonment | 43 (36.8) | 119 (33.1) | 30 (2.8) | ns | p < 0.0001 | |
| Bulgarian citizens infected in Bulgaria (not Roma, not prisoner) | 43 (36.8) | 129 (35.9) | 821 (75.7) | ns | p < 0.0001 | |
a
Comparison between the registered HIV-1-infected persons who inject drugs (PWIDs) (n = 359) and the subgroup of genotyped HIV-1-infected PWIDs (n = 117), Fisher’s exact test. ns, not found to be statistically significant.
b
Comparison between HIV-1-infected PWIDs (n = 359) and HIV-1-infected non-PWIDs (n = 1087), Fisher’s exact test.