From: Association of house spraying with suppressed levels of drug resistance in Zimbabwe
 |  | B | S.E. | Wald | df | Sig. | *Exp(B) | 95.0% C.I. for EXP(B) | |
---|---|---|---|---|---|---|---|---|---|
 |  |  |  |  |  |  |  | Lower | Upper |
Step 1(a) | Transmission level (1) | -1.863 | 0.419 | 19.780 | 1 | 0.000 | 0.155 | 0.068 | 0.353 |
 | Last annual spraying (1) | 1.411 | 0.409 | 11.879 | 1 | 0.001 | 4.099 | 1.838 | 9.142 |
 | Study year |  |  | 13.037 | 4 | 0.011 |  |  |  |
 | Study year (1) | -0.728 | 0.290 | 6.317 | 1 | 0.012 | 0.483 | 0.274 | 0.852 |
 | Study year (2) | -0.400 | 0.317 | 1.589 | 1 | 0.207 | 0.671 | 0.360 | 1.248 |
 | Study year (3) | -0.224 | 0.440 | 0.259 | 1 | 0.611 | 0.799 | 0.338 | 1.892 |
 | Study year (4) | 0.262 | 0.445 | 0.346 | 1 | 0.556 | 1.299 | 0.543 | 3.109 |
 | Constant | -0.157 | 0.407 | 0.149 | 1 | 0.700 | 0.855 |  |  |