| Value | Category |
|---|---|
| 1 | Mosquitoes |
| 2 | Contaminated water |
| 3 | Overexertion/fatigue |
| 4 | Too much time in sun/hot weather |
| 5 | Poor diet |
| 6 | Eating dirty food |
| 7 | Unhygienic surroundings |
| 8 | Tall grass |
| 9 | Wet areas |
| 10 | Transmitted from person to person |
| 11 | During outbreaks |
| 96 | OTHER (SPECIFY) |
| 98 | DON’T KNOW |
| Sysmiss |