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This approach tends to overestimate TB mortality in countries with no VR or mortality survey data and the level of under-reporting of treated TB cases is unknown and large relative to the number of reported cases.   Figure 3 4  shows a comparison of 129 VR-based mortality estimates for 2014 and indirect estimates obtained from the CFR approach for the same countries. The indirect approach tends to slightly overestimate mortality when the VR-based mortality is under 10 TB deaths per 100,000 population per year. It should be noted that countries with VR data tend to be of a higher socio-economic status compared with countries with no VR data where the indirect approach was used.