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Table 5 Multivariable analysis of the selected risk factors associated with the seroprevalence after the univariate analysis and AIC model selection procedure

From: Geographical patterns of malaria transmission based on serological markers for falciparum and vivax malaria in Ratanakiri, Cambodia

  Plasmodium falciparum Plasmodium vivax
Malariometric variable CSP Pf.MSP1.19 Pf.GLURP.R2 PvAMA1 Pv.MSP1.19
Variable level IRR [LCI–UCI] IRR [LCI–UCI] IRR [LCI–UCI] IRR [LCI–UCI] IRR [LCI–UCI]
Age (years)
 2–5 Reference Reference Reference Reference Reference
 6–15 1.44 [1.33–1.57] 1.30 [1.23–1.38] 2.83 [2.54–3.15] 1.40 [1.31–1.50] 1.21 [1.14–1.28]
 16–50 5.44 [5.03–5.89] 1.68 [1.59–1.78] 13.33 [12.02–14.77] 1.98 [1.86–2.16] 1.50 [1.42–1.59]
 >50 11.82 [10.61–13.15] 2.01 [1.86–2.16] 17.90 [15.55–20.61] 2.79 [2.55–3.05] 1.99 [1.84–2.15]
Gender
 Male Reference Reference Reference
 Female 1.06 [1.01–1.12] 1.04 [1.00–1.08] 1.06 [1.02–1.10]
Ethnicity
 Khmer Reference Reference Reference Reference Reference
 Ethnic Minority (EM) 2.72 [2.38–3.12] 1.33 [1.21–1.47] 3.70 [3.11–4.41] 1.31 [1.17–1.47] 1.18 [1.07–1.31]
Overnight plothut
 No Reference Reference Reference Reference
 Yes 1.12 [1.06–1.19] 1.07 [1.03–1.11] 1.24 [1.15–1.33] 1.04 [1.00–1.09]
Overnight forest
 No Reference Reference
 Yes 1.14 [1.05–1.23] 1.07 [1.01–1.14]
  1. a IRR Incidence rate ratio that indicates for how much (if > 1) or less (if < 1) the risk factors affect the data obtained in survey 2 (2012) and survey 4 (2013). This is performed in respect to the reference category and LCI and UCI representing the lower and upper 95 % confidence intervals based on the total sample size of n = 6 502 individuals from 98 communities. p-value <0.10. Missing values were not significant