A decade of intestinal protozoan epidemiology among settled immigrants in Qatar

BMC Infectious Diseases

Table 2 No of subjects in each category and the prevalence (%) of the four protozoan taxa and combined protozoa by host sex, and region of origin

	No. Subjects	B. hominis	G. duodenalis	Non-pathogenic amoebae	E. histolytica/dispar	Combined protozoa
Host sex
Males	16991	*4.20*	*1.66*	*1.73*	*0.26*	*6.81*
Females	12295	2.58	1.20	1.36	0.14	4.73
Region
Arabian Pen.	1441	3.61	1.87	1.94	0.07	6.94
Eastern Med.	2799	2.82	0.54	0.86	0.14	3.97
Africa	5354	*4.33*	1.68	*2.58*	0.28	*7.68*
Asia	10335	4.31	*2.24*	1.96	*0.36*	7.63
Qatar	9357	2.16	0.72	0.73	0.04	3.49

The statistical outputs were derived from minimum sufficient models, after first fitting for each species in turn, all variables into a single full factorial model, and then stepwise backward deletion of non-significant terms
The χ² values for goodness of fit of the minimum sufficient models for B. hominis, G. duodenalis, non-pathogenic amoebae, E. histolytica/dispar and combined protozoan infections were as follows: 1536.2 (df = 1705, P = 0.99), 1322.6 (df = 1801, P = 1), 1232.5 (df = 1728, P = 1), 847.0 (df = 1823, P = 1) and 1350.1 (df = 1420, P = 0.91), respectively. The importance of each factor in the final minimum sufficient model for each taxon is given in the text. Additional terms in the final models, that did not incorporate the presence/absence of parasites are not shown, but can be made available on request from the authors

ISSN: 1471-2334