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Table 4 Univariate analysis of MDA participation, diagnosis and knowledge 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)
MDANever taken2.60 (192) 9.90 (192) 11.98 (192) 15.63 (192) 
Taken (anywhere)1.41 (426)0.53 (0.16–1.77)12.50 (424)1.30 (0.75–2.26)10.61 (424)0.87 (0.51–1.49)17.45 (424)1.15 (0.72–1.81)
Ever diagnosed with LFNo1.46 (616)#11.89 (614)#11.07 (614) 17.10 (614) 
Yes0.00 (8)na0.00 (8)na25.00 (8)2.68 (0.53–13.52)25.00 (8)1.62 (0.32–8.12)
Know swelling or genitourinary symptomNo2.42 (289) 12.46 (289) 12.80 (289) 19.38 (289) 
Yes0.78 (255)0.32 (0.07–1.55)*10.63 (254)0.84 (0.49–1.42)9.84 (254)0.74 (0.43–1.27)15.35 (254)0.75 (0.48–1.18)
Know skin changesNo1.84 (434) 12.24 (433) 11.32 (433) 18.24 (433) 
Yes0.91 (110)0.49 (0.06–3.95)9.09 (110)0.72 (0.35–1.46)11.82 (110)1.05 (0.55–2.01)14.55 (110)0.76 (0.48–1.18)
Know chronic symptomsNo2.49 (241) 13.69 (241) 13.28 (241) 21.16 (241) 
Yes0.99 (303)0.39 (0.10–1.58)*9.93 (302)0.70 (0.41–1.18)*9.93 (302)0.72 (0.42–1.22)14.57 (302)0.64 (0.41–0.99)***
Know acute symptomsNo1.11 (451) 11.09 (451) 11.31 (451) 16.85 (451) 
Yes4.30 (93)4.01 (1.06–15.22)***14.13 (92)1.32 (0.68–2.54)11.96 (92)1.07 (0.53–2.13)20.65 (92)1.28 (0.73–2.25)
Know any symptomNo1.52 (198) 12.63 (198) 13.64 (198) 20.71 (198) 
Yes1.73 (346)1.15 (0.28–4.64)11.01 (345)0.86 (0.50–1.47)10.14 (345)0.72 (0.42–1.22)15.65 (345)0.71 (0.45–1.11)*
Know mosquito as causeNo1.69 (177) 15.25 (177) 16.38 (177) 24.29 (177) 
Yes1.63 (367)0.96 (0.24–3.90)9.84 (366)0.61 (0.35–1.03)**9.02 (366)0.51 (0.30–0.86)***14.21 (366)0.52 (0.33–0.81)***
  1. *P < 0.2, **P < 0.1; ***P < 0.05; ****P < 0.01; # not significant (Fisher’s exact test)
  2. Abbreviations: Ag: antigen (ICT and/or Og4C3); n, no. positive; N, no. tested; na, not available (zero cases)