Table 3. Characteristics of cases and controls.
| Variable | Cases(n = 82) n(%) | Controls (n = 82) n(%) | P value | OR | 95% CI (for OR) |
|---|---|---|---|---|---|
| Occupation | |||||
| Farmer | 49 (59.8) | 57 (69.5) | 0.241 | 1.421 | 0.790–2.556 |
| Non-farmer | 33 (48.2) | 25 (30.5) | |||
| Ethnicity | |||||
| Han | 45 (54.9) | 48 (58.5) | 0.725 | 1.383 | 0.226–8.451 |
| Zhuang | 35 (42.7) | 31 (37.8) | 0.572 | 1.699 | 0.271–10.661 |
| Other* | 2 (2.4) | 3 (3.7) | - | - | - |
| Education status | |||||
| Illiterate | 10 (12.2) | 10 (12.2) | 0.673 | 1.373 | 0.314–5.998 |
| Primary school | 38 (46.3) | 33 (40.2) | 0.387 | 1.566 | 0.566–4.350 |
| Junior middle school | 27 (32.9) | 29 (35.4) | 0.672 | 1.261 | 0.431–3.693 |
| Above high school* | 7 (8.5) | 10 (12.2) | - | - | - |
| Marital status | |||||
| Married | 22 (26.8) | 30 (36.6) | 0.136 | 1.800 | 0.831–3.899 |
| Unmarried | 60(73.2) | 52 (63.4) | |||
| Place of Residence | |||||
| Urban area | 16 (19.5) | 10 (12.2) | 0.207 | 0.571 | 0.240–1.362 |
| Rural area | 66 (80.5) | 72 (87.8) | |||
| Local residence duration | |||||
| Less than 3 months | 28 (34.1) | 22 (26.8) | 0.186 | 0.848 | 0.664–1.083 |
| 3–6 months | 4 (4.9) | 2 (2.4) | |||
| 6–12 months | 1 (1.2) | 1 (1.2) | |||
| More than 12 months | 49 (59.8) | 57 (69.5) | |||
| Household incomes per capita, Yuan | |||||
| Less than 1 000 | 12 (14.6) | 12 (14.6) | 1.000 | 1.000 | 0.489–2.046 |
| 1 000–10 000 | 66 (80.5) | 66 (80.5) | |||
| More than 10 000 | 4 (4.9) | 4 (4.9) | |||
| Number of family members | |||||
| none | 6 (7.3) | 12 (14.6) | 0.512 | 0.897 | 0.648–1.241 |
| two | 21 (25.6) | 14 (17.1) | |||
| three | 33 (40.2) | 21 (25.6) | |||
| Four or more | 22 (26.8) | 35 (42.7) | |||
| History of close contact with TB patient | |||||
| No | 78 (95.1) | 80 (97.6) | 0.423 | 2.000 | 0.366–10.919 |
| Yes | 4 (4.9) | 2 (2.4) | |||
| History of BCG vaccination | |||||
| No | 58 (70.7) | 55 (67.1) | 0.602 | 0.833 | 0.420–1.653 |
| Yes | 24 (29.3) | 27 (32.9) | |||
| History of former plasma donors | |||||
| No | 81 (98.8) | 82 (100.0) | 0.610 | 65.289 | 0.000–628084630.4 |
| Yes | 1 (1.2) | 0 (0.0) | |||
| History of intravenous drug | |||||
| No | 74 (90.2) | 74 (90.2) | 1.000 | 1.000 | 0.375–2.664 |
| Yes | 8 (9.8) | 8 (9.8) | |||
| HIV infect status of regular sex partner | |||||
| Positive | 11 (13.4) | 20 (24.4) | 0.027 | 0.306 | 0.107–0.876 |
| Negative | 17 (20.7) | 17 (20.7) | 0.331 | 0.646 | 0.268–1.560 |
| Unclear | 36 (43.9) | 26 (31.7) | 0.208 | 0.520 | 0.188–1.440 |
| Null information* | 18 (22.0) | 19 (23.2) | - | - | - |
| Extramarital sex | |||||
| No | 19 (23.2) | 15 (18.3) | 0.416 | 0.714 | 0.317–1.608 |
| Yes | 63 (76.8) | 67 (81.7) | |||
| Status of condom using | |||||
| Frequent | 5 (6.1) | 3 (3.7) | 0.385 | 2.009 | 0.416–9.696 |
| Sometimes | 18 (22.0) | 20 (24.4) | 0.801 | 1.147 | 0.396–3.317 |
| Never | 40 (48.8) | 36 (43.9) | 0.413 | 1.42 | 0.610–3.338 |
| Null information* | 19 (23.2) | 23 (28.0) | - | - | - |
| History of drinking | |||||
| No | 68 (82.9) | 66 (80.5) | 0.695 | 0.857 | 0.396–1.853 |
| Yes | 14 (17.1) | 16 (19.5) | |||
| History of smoking | |||||
| No | 52 (63.4) | 66 (80.5) | 0.023 | 2.273 | 1.118–4.619 |
| Yes | 30 (36.6) | 16 (19.5) | |||
| BMI | |||||
| Less than 18.5 kg/m2 | 36 (43.9) | 27 (32.9) | 0.044 | 0.553 | 0.311–0.984 |
| 18.5–24 kg/m2 | 44 (53.7) | 47 (57.3) | |||
| More than 24 kg/m2 | 2 (2.4) | 8 (9.8) | |||
| Chronic disease | |||||
| No | 68 (82.9) | 72 (87.8) | 0.396 | 1.444 | 0.617–3.379 |
| Yes | 14 (17.1) | 10 (12.2) | |||
| Latest CD4+ T-cell count | |||||
| Less than 200 cell/mm3 | 27 (32.9) | 46 (56.1) | 0.002 | 3.714 | 1.612–8.577 |
| More than 200 cell/mm3 | 55 (67.1) | 36 (43.9) | |||
| HIV Risk Factors | |||||
| Sexual | 73 (89.0) | 71 (86.6) | 1.000 | 1.000 | 0.250–3.998 |
| Intravenous drug | 4 (4.9) | 6 (7.3) | 0.672 | 0.667 | 0.102–4.354 |
| Other* | 5 (6.1) | 5 (6.1) | - | - | - |
| Status of ART | |||||
| No | 25 (30.5) | 51 (62.2) | 0.000 | 3.889 | 1.869–8.090 |
| Yes | 57 (69.5) | 31 (37.8) | |||
| Duration of HIV infection | |||||
| Less than 5 years | 13 (15.9) | 21 (25.6) | 0.005 | 2.282 | 1.287–4.048 |
| 5–9 years | 45 (54.9) | 52 (63.4) | |||
| More than 9 years | 24 (29.3) | 9 (11.0) |
* reference for dummy raviable analysis