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Table 3 Association of applied pest control methods and practices, with cockroach infestations by univariate analysis

From: Surveillance study of vector species on board passenger ships, Risk factors related to infestations

  Ferries with cockroach infestations
Factors Factor Yes (%) Factor No (%) RR (95% CI)
Pest control methods and practices    
Cockroaches observed by crew 9 (81.8) 2 (20.0) 4.09 (1.14–14.57)
Flies observed by crew 6 (60.0) 5 (45.5) 1.32 (0.58–3.00)
Regular visual inspections by crew 10 (58.8) 1 (25.0) 2.35 (0.41–13.45)
Use of spray pesticide by crew 10 (66.7) 1 (16.7) 4.00 (0.64–24.80)
Fumigation application 2 (40.0) 7 (58.3) 0.68 (0.21–2.22)
Absence of cockroach monitoring record log 10 (71.4) 1 (14.3) 5.00 (0.79–31.62)
Pesticide A: Cyfluthrin/spray 7 (87.5) 4 (30.8) 2.84 (1.20–6.96)
Pesticide B: Fripronil/gel 8 (80.0) 3 (27.3) 2.93 (1.06–8.08)
Pesticide C: Alphacypermethrin/spray 5 (83.3) 6 (40.0) 2.08 (1.01–4.26)
Pesticide D: Deltamethrin/spray 1 (50.0) 10 (52.6) 0.95 (0.22–4.05)
Pesticide E: Methylisobutylketone/spray 1 (50.0) 10 (52.6) 0.95 (0.22–4.05)
Pesticide F: Permethrin/smoke generator 2 (66.7) 9 (50.0) 1.33 (0.52–3.3)
Other factors    
   Pet transportation on board 7 (53.8) 4 (50.0) 1.07 (0.45–2.53)
   HACCP application 1 (16.7) 10 (71.4) 0.23 (0.03–1.43)
   Itinerary: North-East Aegean 5 (83.3) 6 (40.0) 2.08 (1.01–4.26)
   Itinerary: Cyclades 5 (55.6) 6 (50.0) 1.11 (0.49–2.50)