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Table 2 Estimated hazard ratio (univariable model) and adjusted hazard ratio (multivariable model) for acquiring malaria conditional on the estimated level of exposure in the destination country

From: Risk factors for UK Plasmodium falciparum cases

  Hazard Ratio (95% confidence interval) p Adjusted hazard ratio (95% confidence interval) p
Purpose   <0. 0001*   <0. 0001*
VFR 6. 3 (5. 6–7. 0) <0. 0001 7. 4 (6. 4–8. 5) <0. 0001
Misc* 0. 43 (0. 29–0. 58) <0. 0001 0. 43 (0. 27–0. 59) <0. 0001
Business 2. 4 (2. 0–2. 9) <0. 0001 3. 4 (2. 9–3. 8) <0. 0001
Holiday 1   1  
Missing     
Age group (years)   <0. 0001*   <0. 0001*
0–15 1   1  
16–24 0. 41 (0. 31–0. 58) 0. 002 0. 58 (0. 43–0. 80) <0. 0001
25–34 0. 20 (0. 16–0. 26) <0. 0001 0. 26 (0. 19–0. 32) <0. 0001
35–44 0. 22 (0. 18–0. 31) <0. 0001 0. 22 (0. 17–0. 28) <0. 0001
45–54 0. 31 (0. 24–0. 41) <0. 0001 0. 44 (0. 33–0. 55) <0. 0001
55–64 0. 36 (0. 26–0. 49) <0. 0001 0. 55 (0. 41–0. 77) <0. 0001
65+ 0. 49 (0. 33–0. 76) <0. 0001 0. 45 (0. 31–0. 65) <0. 0001
Missing     
Total     
  1. *Significance test for inclusion of the covariate obtained using likelihood ratio tests. IQR: Inter-quartile range. Misc: Miscellaneous purpose of travel.