Epidemiology of coinfection with soil transmitted helminths and Plasmodium falciparum among school children in Bumula District in western Kenya

Table 4 Results of Mantel-Haenszel adjusted odds ratios of the presence of Ascaris lumbricoides infection on Plasmodium falciparum infection by sex, adjusting for age and hookworm infection

Sex	Age (years)	% positive for A. lumbricoides	% positive for Plasmodium	Odds ratio (95 % CI), χ ² P value^a	Odds ratio (95 % CI), χ ² P value
Boys
	5-8	17.9 (111/624)	52.1 (325/624)	0.99 (1.64-1.53) 0.97
	9-10	13.6 (92/677)	51.7 (350/677)	1.42 (0.90-2.23) 0.131	1.12 (0.91-1.40) 1.13, P = 0.289
	11-12	14.2 (103/728)	48.8 (355/728)	1.03 (0.74-1.72) 0.581
	13-18	12.9 (97/753)	43.7 (329/753)	1.03 (0.67-1.58) 0.898
			Homogeneity of ORs^b: χ ² = 1.49; 0.685
Girls
	5-8	12.5 (137/670)	47.2 (316/670)	0.99 (0.67-1.45) 0.957
	9-10	14.3 (125/736)	47.0 (346/736)	1.12 (0.76-1.65) 0.574
	11-12	13.6 (98/683)	42.3 (288/683)	1.09 (0.70-1.70) 0.697	1.15 (0.93-1.42) 1.71, P = 0.192
	13-18	34.3 (76/600)	38.7 (232/600)	1.64 (1.00-2.67) 0.045
			Homogeneity of ORs^b: χ ² = 2.70; 0.439

^aAge specific OR of P. falciparum in those concurrently infected with hookworm relative to those who are hookworm negative
^bThis test compares whether there was a significant difference between age-specific OR, hence whether the overall adjusted OR is valid

ISSN: 1756-3305