Table 3. Logistic regression analysis of factors associated with testing positive for Strongyloides stercoralis among immigrant individuals, study of S. stercoralis epidemiology, northern Italy, February 2013–July 2014 (n = 386 of which 214 cases and 172 controls).

Factors	OR	95% CI	P value
Eosinophil count ≥ 500/mcL	9.62	2.85–32.41	< 0.001
Sex (male vs female)	1.70	0.82–3.54	0.16
Age ( + 1 year)	1.00	0.97–1.03	0.83
Geographical area of origin
Europe	1.00	Reference	NA
North Africa/Middle East	1.77	0.28–11.27	0.55
Asia	5.01	1.02–24.59	0.047
Latin America	6.33	1.20–33.40	0.030
Sub-Saharan Africa	9.54	2.01–45.19	0.004

CI: confidence interval; NA: not applicable; OR: odds ratio.