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Table 3 Comparison of Flavivirus prevalence by site, demographic parameters and history of YF vaccination from Firth’s multiple logistic regression model

From: Serological evidence of Flavivirus circulation in human populations in Northern Kenya: an assessment of disease risk 2016–2017

Variable West Pokot (N = 464) Variable Turkana (N = 413)
Yellow fever (n = 6) Zika (n = 33) Yellow Fever (n = 44) West Nile (n = 42)
aOR (95% CI) Pvalue aOR (95% CI) Pvalue aOR (95% CI) Pvalue aOR (95% CI) Pvalue
Site Site
 Kokipei Reference   Reference    Elelea Reference   Reference  
 Sangakai 8.24 (0.31–220.15) 0.208 0.77 (0.23–2.60) 0.669  Prigan 0.42 (0.10–1.79) 0.240 0.98 (0.21–4.69) 0.982
 Kanyerus 8.32 (0.40–172.04) 0.170 1.10 (0.41–2.93) 0.853  Kare Edome 0.32 (0.10–1.04) 0.058 0.94 (0.28–3.17) 0.925
 Shaba 1.46 (0.03–77.85) 0.851 0.45 (0.12–1.70) 0.241  Nayanaesanyati 0.36 (0.12–1.07) 0.066 1.21 (0.37–3.92) 0.749
 Longarkau 2.02 (0.04–110.5) 0.731 0.24 (0.04–1.46) 0.122  Old gunner 0.39 (0.12–1.22) 0.106 0.88 (0.24–3.14) 0.838
 Pkotong 2.02 (0.04–104.34) 0.728 0.36 (0.08–1.67) 0.191  Lowarengak 0.39 (0.15–0.99) 0.047 1.45 (0.49–4.31) 0.505
Sex Sex
 female Reference   Reference    female Reference   Reference  
 male 0.40 (0.04–4.62) 0.466 2.01 (0.91–4.41) 0.084  male 0.84 (0.41–1.72) 0.631 2.55 (1.22–5.34) 0.013
Age group Age group
 13–19 Reference   Reference    13–19 Reference   Reference  
 20–29 0.82 (0.03–24.26) 0.910 0.35 (0.07–1.81) 0.209  20–29 1.26 (0.41–3.84) 0.686 0.76 (0.22–2.66) 0.663
 30–39 1.76 (0.08–38.73) 0.721 0.42 (0.09–2.07) 0.288  30–39 1.59 (0.52–4.84) 0.414 1.43 (0.41–4.92) 0.574
 40–49 1.06 (0.04–30.49) 0.975 0.45 (0.09–2.31) 0.337  40–49 1.03 (0.26–4.01) 0.970 1.09 (0.24–4.94) 0.912
 50+ 0.39 (0.01–12.26) 0.595 0.34 (0.07–1.59) 0.169  50+ 0.72 (0.22–2.38) 0.589 2.10 (0.66–6.66) 0.206
Herdsman Herdsman
 No Reference   Reference    No Reference   Reference  
 Yes 3.16 (0.2–48.99) 0.411 1.16 (0.36–3.72) 0.806  Yes 0.93 (0.27–3.28) 0.915 1.40 (0.52–3.74) 0.508
Yellow fever vaccinated Yellow fever vaccinated
 No Reference   Reference    No Reference   Reference  
 Yes 0.61 (0.09–3.91) 0.599 1.05 (0.42–2.60) 0.924  Yes 0.81 (0.13–5.13) 0.819 1.70 (0.34–8.57) 0.519
 Don’t know 1.45 (0.22–9.79) 0.701 2.90 (1.11–7.60) 0.030  Don’t know 1.21 (0.61–2.41) 0.586 0.75 (0.37–1.53) 0.427