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Table 1 Outcome of TB contact investigation in Accra, 2010–2014

From: Yield of tuberculosis among household contacts of tuberculosis patients in Accra, Ghana

Year Number of index TB cases registered Number of index cases with contacts listed Number of contacts listed Number of contacts screened Number of contacts suspected to have TB Number of contacts suspected with TB who were tested TB cases identified Prevalence of TB among contacts screened (%) NNS NNT
2010a 359 316 811 679 28 28 10 1.5 68 2.8
2011 873 826 2051 1953 136 136 15 0.8 130 9
2012 872 794 2285 2219 175 153 11 0.5 202 13.9
2013 797 749 1930 1945 139 64 9 0.5 216 7
2014b 604 582 1442 1370 136 57 8 0.6 171 7
Total 3505 3267 8519 8166 614 438 53 0.65 154 8
  1. aThe data from 2010 reflects only seven months of that year, from June to December. bIn 2014, contact investigation activities continued for the entire year up to December 31 even though funding for the project ceased