Table 4.

Univariate meta-regression analysis of factors for the prevalence of trypanosome infection based on the laboratory experimental studies with dissection method used for diagnosis of trypanosome infection

Variables	Prevalence (%)			Odds ratio
	Estimate	95% CI		Estimate	95% CI		p-value
Year of publication	-		-	0.996	0.99	1.00	0.184
Country
Zimbabwe	54.5	52.2	56.8	Ref
Kenya	50.9	31.7	70.0	0.96	0.62	1.51	0.866
Zambia	44.3	42.0	46.6	0.90	0.49	1.65	0.726
Uganda	21.4	14.9	27.9	0.71	0.45	1.15	0.155
Belgium	20.8	13.9	27.8	0.72	0.44	1.18	0.181
United Kingdom	20.5	0.0	41.3	0.71	0.43	1.17	0.171
Burkina Faso and Zimbabwe	20.1	9.1	31.0	0.71	0.42	1.22	0.192
France	14.5	11.6	17.3	0.67	0.37	1.22	0.181
Burkina Faso	10.0	8.4	11.5	0.64	0.38	1.08	0.093
Glossina sample type
Proboscis	56.1	43.3	68.8	Ref
Mid gut and salivary gland	32.7	0.0	76.3	0.80	0.59	1.09	0.145
Salivary gland	22.3	16.8	27.8	0.71	0.58	0.89	0.004
Mid gut and proboscis	20.2	13.5	26.9	0.70	0.56	0.89	0.005
Mid gut	19.0	0.0	51.4	0.69	0.53	0.89	0.007
MPS	17.6	10.1	25.1	0.71	0.56	0.89	0.006
Salivary gland and proboscis	9.8	5.6	14.0	0.63	0.42	0.95	0.028
Glossina species
G. brevipalpis	51.9	0.0	100.0	Ref
G. tachinoides	40.2	37.2	43.3	0.89	0.48	1.66	0.698
G. morsitans	37.9	23.6	52.2	0.87	0.59	1.28	0.455
G. fuscipes	31.7	11.2	52.2	0.82	0.49	1.36	0.415
G. austeni	31.5	28.7	34.2	0.81	0.44	1.52	0.499
G. palpalis	31.0	23.4	38.7	0.796	0.52	1.22	0.278
G. pallidipes	11.9	0.0	24.0	0.67	0.42	1.07	0.088
Mixed	10.0	8.4	11.5	0.66	0.35	1.22	0.174

MPS Mid gut, proboscis and salivary gland