| Risky Behavior (Yes-No) | Index cases (n = 125) | Positive Household Contacts/ All Household Contacts. | Z-test (Sig.) | |
| n/N | % | |||
| Helped Index case during an attack of haematemesis or a bleeding wound | 2.2 (P < 0.05) | |||
| (Yes) | 29 | 22/110 | 20 | |
| NO | 96 | 22/211 | 10.4 | |
| Helped primary case during other bleeding episodes |
| |||
| (Yes) | 10 | 8/55 | 14.55 | −0.02 (P > 0.05) |
| NO | 115 | 36/266 | 13.53 | |
| Precautions taken against transmission |
| |||
| (No) | 96 | 42/303 | 13.8 | −0.02 (P > 0.05) |
| YES | 29 | 2/18 | 11.1 | |
| Have been soiled with blood during help of primary case |
| |||
| (Yes) | 6 | 4/23 | 17.39 | 0.22 (P > 0.05) |
| NO | 119 | 40/298 | 13.42 | |
| Change of soiled clothes and hand hygiene |
| |||
| (No) | 122 | 42/302 | 13.9 | 0.07 (P > 0.05) |
| YES | 3 | 2/19 | 10.53 | |
| Give index case Intravenous Injection |
| |||
| (Yes) | 8 | 7/25 | 28 | 1.86 (P < 0.05) |
| NO | 117 | 37/296 | 12.5 | |
| Accompanied index patient during hospital-stay |
| |||
| (Yes) | 9 | 6/25 | 24 | 1.26, P > 0.05 |
| NO | 116 | 38/296 | 12.81 | |
| Use of thee same shaving razors and scissors as index case |
| |||
| (Yes) | 50 | 14/67 | 20.9 | 1.72, P > 0.05 |
| NO | 75 | 30/254 | 11.8 | |
| Use o the f same tooth brushes as primary case |
| |||
| (Yes) | 10 | 2/17 | 11.7 | −0.12, P > 0.05 |
| NO | 115 | 42/304 | 13.82 | |
| Visit same dentists as primary case |
| |||
| (Yes) | 50 | 18/76 | 23.68 | 2.70, P < 0.01 |
| NO | 75 | 26/245 | 10.61 | |