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Table 6 The probability of chloroquine therapeutic failiure as a function of transmission level and spraying history: variables in the equation

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   
  1. a Variable(s) entered on step 1: Transmission, Last annual spraying, Study year.
  2. * corresponds to odds ratio for therapeutic failure