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Table 3 Incidence rate ratios of human brucellosis between periods 1997–1998 and 2000–2002

From: Incidence of human brucellosis in a rural area in Western Greece after the implementation of a vaccination programme against animal brucellosis

Period Incidence rate ratio* 95% C.I.
2000–2002 vs 1997–1998 0.15 0.10 – 0.23
2000–2002 (bv**) vs 1997–1998 0.13 0.09 – 0.20
2000–2002 (av***) vs 2000–2002 (bv**) 0.20 0.08 – 0.52
  1. * Poisson regression
  2. ** before vaccination
  3. *** after vaccination