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Table 3 Univariate analysis of residence and mobility/travel risk factors affecting antigen and antibody positivity

From: Demographic, socioeconomic and disease knowledge factors, but not population mobility, associated with lymphatic filariasis infection in adult workers in American Samoa in 2014

FactorLevelAgBm14 AbWb123 AbAny Ab
% positive (n)OR (95% CI)% positive (n)OR (95% CI)% positive (n)OR (95% CI)% positive (n)OR (95% CI)
Years lived in AS< 92.91 (103)Ref8.74 (103)Ref12.62 (103)Ref15.53 (103)Ref
9–142.25 (89)0.77 (0.13–4.69)19.10 (89)2.47 (1.04–5.85)***17.98 (89)1.52 (0.69–3.36)25.84 (89)1.89 (0.93–3.87)**
> 141.54 (456)0.52 (0.13–2.04)10.82 (453)1.27 (0.60–2.67)9.49 (453)0.73 (0.37–1.41)15.67 (453)1.01 (0.56–1.82)
Ever been outside ASNo2.78 (72) 6.94 (72) 9.72 (72) 11.11 (72) 
Yes1.72 (577)0.62 (0.13–2.87)12.37 (574)1.89 (0.74–4.85)*11.50 (574)1.21 (0.53–2.74)17.94 (574)1.75 (0.81–3.76)*
Travel to SamoaaNo1.86 (431) 12.12 (429) 11.66 (429) 17.72 (429) 
Yes1.83 (218)0.99 (0.29–3.32)11.06 (217)0.90 (0.54–1.51)10.60 (217)0.90 (0.53–1.52)16.13 (217)0.89 (0.58–1.38)
Visitor from SamoaaNo1.83 (383) 12.34 (381) 11.55 (381) 17.59 (381) 
Yes1.90 (263)1.04 (0.33–3.32)11.07 (262)0.88 (0.54–1.45)11.07 (262)0.95 (0.58–1.57)16.79 (262)0.95 (0.62–1.44)
Travel to endemic areaaNo1.90 (421) 12.41 (419) 11.69 (419) 17.90 (419) 
Yes1.76 (227)0.93 (0.28–3.11)10.62 (226)0.84 (0.50–1.40)10.18 (226)0.86 (0.51–1.45)15.49 (226)0.84 (0.54–1.30)
Travel to non-endemic areaaNo2.05 (584)#12.18 (583) 11.66 (583) 17.50 (583) 
Yes0.00 (64)na8.06 (62)0.63 (0.25–1.63)6.45 (62)0.52 (0.18–1.48)12.90 (62)0.70 (0.32–1.51)
  1. *P < 0.2, **P < 0.1, ***P < 0.05, ****P < 0.01, # not significant (Fisher’s exact test)
  2. aIn last 12 months
  3. Abbreviations: Ag: antigen (ICT and/or Og4C3); AS, American Samoa; n, no. positive; N, no. tested; na, not available (zero cases); ref, reference category