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Statistical significance of the comparison between the second year and third year
| ITEM | c2 value | p value |
| Health records’ control | 3,442 | 0.623 |
| ID bracelet’s control | 9.914 | 0.078 |
| Direct communication with the patient/carer/family member | 10.535 | 0.061 |
| Double check identity | 1.770 | 0.880 |
