Table 1.

Overall risk ratios of first line anti-TB drugs resistance in relation to previous history of anti-TB drug treatment or HIV status, a meta-analyses in Sub-Saharan Africa

TB Resistance predictor	Risk of resistance		Heterogeneity test
	Overall			Degrees of
	Risk Ratio	95% CI	I2	freedom
By anti-TB treatment
history:
Isoniazid	3.22	2.45 – 4.24	80%	12
Rifampicin	5.25	3.27 – 8.37	80%	12
Streptomycin	2.68	1.89 – 3.82	75%	10
Ethambutol	5.81	3.35 – 10.05	64%	10
By HIV status:
Isoniazid	0.99	0.81 – 1.22	0%	4
Rifampicin	1.02	0.52 – 2.00	55%	4
Streptomycin	1.09	0.75 – 1.59	42%	3
Ethambutol	0.81	0.16 – 4.11	52%	3

TB = Tuberculosis