Table 5.
Reliability of each of the six domains and all the items of the AdultCarbQuiz tool
| Name of domain | No of items | Cronbach’s α (95% CI) |
Split-half reliability coefficient with Spearman-Brown correction |
| Carbohydrate food recognition | 19 | 0.864 (0.836 to 0.888) | |
| Counting carbohydrates in each of the foods | 7 | 0.899 (0.878 to 0.918) | |
| Interpreting nutrition labels for carbohydrates | 4 | 0.794 (0.747 to 0.835) | |
| Glycaemic targets | 4 | 0.488 (0.369 to 0.589) | |
| Hypoglycaemia prevention and treatment | 5 | 0.577 (0.483 to 0.659) | |
| Counting carbohydrates in a meal | 4 | 0.815 (0.772 to 0.852) | |
| All items | 43 | 0.874 (0.849 to 0.896) | |
| Odd-numbered and even-numbered items | 0.865 |