Table 2. Situation of the internal consistency and test-retest reliability for each domain .
| domain | Number of questions | Cronbach's alpha | Mean of inter-item correlation |
Internal
consistency reliability |
ICC * (95%confidence interval) | Test-retest reliability |
| Main | 5 | 0.84 | 0.55 | Suitable | 0.93(0.82 -0.97) | Excellent |
| Self-evaluation of the expenditure capacity | 6 | 0.96 | 0.79 | Suitable | 0.78(0.53 -0.90) | Suitable |
| Wealth | 5 | 0.70 | 0.41 | Suitable | 0.57( 0.04 -0.81) | Medium |
| House and furniture | 4 | 0.66 | 0.42 | Medium | 0.68(0.29 -0.85) | Suitable |
| Health expenditure | 2 | 0.55 | 0.43 | Medium | 0.83(0.63 -0.92) | Medium |
Note: Total Cronbach's alpha and total Intraclass correlation were 0.91 and0.66, respectively /*Intraclass correlation