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

Table 3 Results of Mantel-Haenszel adjusted odds ratios of the presence of hookworm infection on Plasmodium falciparum infection by sex, adjusting for age and Ascaris lumbricoides infection

Sex	Age (years)	% positive for hookworm	% positive for Plasmodium	Odds ratio (95 % CI), χ ², P value^a	Odds ratio (95 % CI), χ ², P value
Boys
	5-8	18.4 (115/624)	52.1 (325/624)	2.24 (1.43-3.50) 0.0003
	9-10	16.4 (111/677)	51.7 (350/677)	1.21 (0.80-1.85) 0.354	1.40 (1.16-1.70) 8.85, P = 0.0004
	11-12	21.2 (154/728)	48.8 (355/728)	1.61 (1.12-2.33) 0.01
	13-18	23.4 (176/753)	43.7 (329/753)	1.03 (0.73-1.45) 0.853
			Homogeneity of ORs^b: χ ² = 8.42; 0.040
Girls
	5-8	12.5 (84/670)	47.2 (316/670)	1.77 (1.10-2.85) 0.02
	9-10	14.3 (105/736)	47.0 (346/736)	1.51 (0.99-2.31) 0.05
	11-12	13.6 (93/683)	42.3 (288/683)	0.97 (0.61-1.53) 0.896	1.33 (1.06-1.66) 3.41, P = 0.01
	13-18	34.3 (84/600)	38.7 (232/600)	1.19 (0.74-1.90 0.475
			Homogeneity of ORs^b: χ ² = 3.84; 0.28

^aAge specific OR of P. falciparum in those concurrently infected with A. lumbricoides relative to those who are A. lumbricoides 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