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Table 3 Comparison of the incidence and risk factors of Opisthorchis viverrini infection between 2 cohort studies in this area

From: A follow-up study of Opisthorchis viverrini infection after the implementation of control program in a rural community, central Thailand

  Rangsin et al.[18] The present study
Study duration 2002-2004 2007-2009
Incidence (/100 person-years) 21.6 21.4
Significant risk factors (Adjusted RR, 95% CI)
Age 20–39 years 3.1 (1.1-8.2)*  
Age 40–59 years 2.7 (1.0-7.4)*  
Age ≥ 60 years 4.1 (1.45-11.8)* 1.9 (1.0 – 3.4)**
Consuming Koi pla 1.9 (1.1-3.3) 1.6 (1.1-2.3)
  1. *compared with 0–19 age group, ** compared with 0–24 age group.