Prevalence of asymptomatic malaria, submicroscopic parasitaemia and anaemia in Korogwe District, north-eastern Tanzania

Table 5 Univariate and multivariate associations of anaemia with asymptomatic malaria using microscopy, RDT, adjusted for age, sex and altitude

Variable	Unadjusted OR 95% CI	p-values	Model 1	P-values	Model 2	P-values
Variable	Unadjusted OR 95% CI	p-values	Adjusted OR, 95% CI	P-values	Adjusted OR, 95% CI	P-values
Asymptomatic based on microscopy
Negative	Ref		Ref	–	–	–
Positive	1.90 (0.90–4.0)	0.09	2.1 (1.0–4.5)	0.56	–	–
Age group (yr)
< 5	Ref		Ref		Ref
5–11	0.8 (0.5–1.3)	0.41	0.8 (0.5–1.2)	0.25	0.8 (0.5–1.2)	0.21
12–14	0.6 (0.3–1.3)	0.20	0.6 (0.3–1.2)	0.13	0.6 (0.3–1.1)	0.11
15–19	0.8 (0.4–1.5)	0.41	0.7 (0.4–1.5)	0.38	0.7 (0.4–1.4)	0.30
Sex
Male	Ref		Ref		Ref
Female	0.7 (0.5–1.0)*		0.7 (0.5–1.0)	0.53	1.0 (0.1–1.0)*	0.04
Altitude
High	Ref		Ref		Ref
Low	1.2 (0.8–1.7)	00.44	1.2 (0.8–1.8)	0.40	1.2 (0.8–1.7)	0.49
Asymptomatic based on RDT
Negative	Ref	–	–	–	Ref
Positive	1.9 (1.3–2.8)*	0.03	–	–	2.1 (1.3–3.2)*	0.01

*p < 0.05, Model 1 included asymptomatic malaria based on microscopic results adjusted for gender, age and altitude whilst model 2 included asymptomatic malaria based on RDT adjusted for gender, age and altitude. The age groups presented here are as per the WHO haemoglobin concentrations for the diagnosis of anaemia and assessment of severity [17]

ISSN: 1475-2875