| Unit root test results/Diabetes data | ||||
| Test Type | Level | 1st Difference | ||
| Test value | Prob | Test value | Prob | |
| ADF test | −2.15 | 0.51 | −6.65 | 0.01 |
| PP test | −8.74 | 0.21 | −14.52 | 0.01 |