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Table 2 Chloroquine therapeutic failure (TF) rates in Sahumani and Burma Valley from 1995–2003.

From: Association of house spraying with suppressed levels of drug resistance in Zimbabwe

  Therapeutic failure rate (n)
  1995 1997/98* 1999 2003
Burma Valley 27.0% (37) 15.2% (33) 7.9% (93) 26.5% (83)
Sahumani 41.2% (51) 30.3% (33) 26.9% (65) -
Odds ratio (95% CI) 1.89 (0.76 – 4.72) 2.4 (0.73 – 8.14) 4.3 (1.54 – 11.85) -
P 0.170 0.142 0.003 -
  1. *Burma Valley 1997 compared to Sahumani 1998.