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The probability of chloroquine therapeutic failiure as a function of transmission level and spraying history: Model if term removed
| Variable | Model Log Likelihood | Change in -2 Log Likelihood | df | Sig. of the Change | |
| Step 1 | Transmission level | -331.110 | 23.239 | 1 | .000 |
| Last annual spraying | -326.469 | 13.956 | 1 | .000 | |
| Study year | -326.142 | 13.303 | 4 | .010 |
