Table 4. Robust Trend Tests for Malaria Series.
| tDAN for a test of size | |||||||
| Sample Period | Slope 
|
Change in Malaria Cases | 1% | 2.5% | 5% | 10% | J |
| Unadjusted Data | |||||||
| 1966:1-1995:1 | 0.0810 | 29 | 2.5660 | 3.2274 | 3.7938 | 4.2862 | 0.3418 |
| 1966:1-2006:6 | 0.0834 | 40 | 2.4009 | 2.8119 | 3.1433 | 3.4190 | 0.2355 |
| 1966:1-2010:5 | 0.0436 | 23 | 0.9523 | 1.2006 | 1.4135 | 1.5989 | 0.3452 |
| Deseasonalized Data | |||||||
| 1966:1-1995:1 | 0.0806 | 29 | 2.0569 | 2.7454 | 3.3650 | 3.9238 | 0.4303 |
| 1966:1-2006:6 | 0.0839 | 41 | 2.2154 | 2.6583 | 3.0227 | 3.3305 | 0.2716 |
| 1966:1-2010:5 | 0.0440 | 24 | 0.8577 | 1.1158 | 1.3432 | 1.5450 | 0.3921 |
Note: Significant t-statistics are marked in bold. tDAN test is for significance of the trend and J is a test for a unit root in the residuals of the trend regression.