Skip to main content

Advertisement

Table 5 MODEL A: multivariate logistic regression of risk factors affecting LF antigen and antibody positivity: sociodemographic, residence and knowledge covariates, all participants (n = 638–641)

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

FactorLevelAg (n = 641)Bm14 Ab (n = 641)Wb123 Ab (n = 638)Any Ab (n = 638)
OR (95% CI)POR (95% CI)POR (95% CI)POR (95% CI)P
Sampling siteClinic vs Cannery2.52 (0.65–9.75)*0.182  0.52 (0.24–1.13)**0.099  
Age group (years)15–24  Ref Ref Ref 
25–34  1.21 (0.32–4.61)0.7790.64 (0.21–1.94)0.4310.55 (0.21–1.42)0.219
35–44  3.75 (1.21–11.63)***0.0221.36 (0.54–3.40)0.5111.46 (0.67–3.19)0.342
45–54  3.76 (1.22–11.67)***0.0221.70 (0.69–4.21)0.2521.38 (0.62–3.05)0.427
> 55  4.17 (1.12–15.51)***0.0330.63 (0.15–2.70)0.5361.35 (0.49–3.72)0.557
GenderMale vs female2.64 (0.78–8.94)*0.1183.44 (2.04–5.82)****< 0.0013.63 (2.11–6.27)****< 0.0013.49 (2.21–5.49)****< 0.001
SES quantilePer decr. quantile2.89 (1.09–7.69)***0.0331.30 (0.92–1.84)*0.1361.46 (1.02–2.11)***0.0411.51 (1.12–2.05)****0.007
Years lived in AS< 9  Ref Ref Ref 
9–14  2.26 (0.89–5.72)**0.0861.62 (0.67–3.90)0.2832.00 (0.91–4.40)**0.083
> 14  1.22 (0.55–2.70)0.6240.76 (0.37–1.57)0.4621.12 (0.58–2.13)0.741
Ever been outside ASYes vs no      1.80 (0.75–4.32)*0.190
Know swelling or genitourinary symptomYes vs no0.29 (0.06–1.41)*0.125      
Know acute symptomsYes vs no3.53 (0.98–12.74)**0.054    1.60 (0.86–2.95)*0.135
Know mosquito as causeYes vs no  0.65 (0.38–1.09)*0.1020.55 (0.32–0.95)***0.0320.56 (0.36–0.90)***0.016
Constant 0.0009 (0.0003–0.03)****< 0.0010.02 (0.003–0.09)****< 0.0010.07 (0.02–0.32)****< 0.0010.03 (0.01–0.13)****< 0.001
Log-likelihood − 52.969305 − 206.46537 − 197.11102 − 259.59574 
Log-likelihood (inc. county) − 48.999694 − 200.41316 − 190.39068 − 253.82438 
LR Chi-square 21.25**0.06857.07****< 0.00160.62****< 0.00172.60****< 0.001
Pseudo R2 0.1782 0.1246 0.1373 0.1251 
  1. *P < 0.2, **P < 0.1, ***P < 0.05, ****P < 0.01
  2. Abbreviations: Ag: antigen (ICT and/or Og4C3); AS, American Samoa; n, no. positive; N, no. tested; na, not available (zero cases); Ref, reference category; inc., including; LR, likelihood ratio