Table 3.

Univariate meta-regression analysis of factors for the prevalence of trypanosome infection based on the field 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	-		-	0.998	0.996	0.999	0.035
Country
Burkina Faso	40.5	28.1	53.0	Ref.
Ivory Coast	18.6	13.7	23.6	0.82	0.69	0.97	0.021
Nigeria	18.0	5.0	30.9	0.80	0.67	0.95	0.010
Cameroon	10.9	2.9	18.8	0.74	0.62	0.89	0.002
Uganda	10.0	3.0	17.0	0.74	0.62	0.88	0.001
Zambia	8.6	3.1	14.1	0.73	0.61	0.86	<0.001
Liberia	8.2	4.4	12.1	0.74	0.61	0.89	0.002
Kenya	7.4	3.5	11.4	0.72	0.61	0.85	<0.001
Tanzania	7.0	5.2	8.9	0.71	0.61	0.84	<0.001
South Africa	6.8	0.2	20.5	0.71	0.58	0.88	0.002
Gambia	6.0	5.2	6.8	0.71	0.59	0.85	<0.001
Ethiopia	4.9	0.6	9.2	0.70	0.58	0.84	<0.001
Rwanda	4.1	3.0	5.1	0.70	0.58	0.84	<0.001
Glossina sample type
MS	30.8	7.6	53.9	Ref.
Salivary gland	19.3	18.4	20.2	0.91	0.69	1.19	0.472
MPS	11.2	8.5	14.0	0.84	0.72	0.98	0.023
Proboscis	10.6	4.3	16.9	0.83	0.70	0.98	0.029
Mid gut	6.5	4.6	8.3	0.83	0.70	0.98	0.027
Mid gut and proboscis	6.5	5.0	8.0	0.80	0.68	0.94	0.007
Glossina species
G. nigrofusca	25.9	1.9	49.9	Ref.
G. pallicera	23.5	12.4	34.7	1.04	0.81	1.34	0.751
G. medicorum	20.0	4.8	44.8	0.96	0.66	1.39	0.811
G. tachinoides	17.7	8.5	26.9	0.93	0.78	1.12	0.454
G. morsitans	15.8	9.0	22.6	0.92	0.77	1.08	0.304
G. austeni	15.0	3.9	2.16	0.91	0.68	1.22	0.520
G. palpalis	10.5	6.4	14.6	0.87	0.74	1.03	0.107
G. mixed species	9.6	4.3	14.8	0.86	0.72	1.03	0.102
G. swynnertoni	9.2	3.0	15.4	0.86	0.71	1.03	0.101
G. pallidipes	8.3	5.8	10.8	0.85	0.72	1.00	0.052
G. brevipalpis	5.8	2.3	9.3	0.83	0.69	1.00	0.046
G. fuscipes	1.1	0.1	2.1	0.79	0.65	0.96	0.017
G. longipennis	0.2	0.1	0.5	0.78	0.63	0.98	0.031

MS Mid gut and salivary gland, MPS Mid gut, proboscis and salivary gland