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Understanding the TB Cohort Review Process: Instruction Guide 2006Appendix A: Answers to ExercisesAnswers to Exercise 6
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| a | x 100 | = | 26 | = | 26 | = | .65 x 100 = 65% |
| Total cases – (c + d + e) | 43 – (1+2+0) | 40 |
2. Index of possible treatment completion:
| a | x 100 | = | 26 | = | 26 | = | .703 x 100 = 70.3% |
| Total cases – (c + d + e + f + g + h) | 43 – (1+2+0+1+0+2) | 37 |
3. Index of likely to complete treatment:
| a + b | x 100 | = | 26+ 8 | = | 34 | = | .919 x 100 = 91.9% |
| Total cases – (c + d + e + f + g + h) | 43 – (1+2+0+1+0+2) | 37 |
4. Death rate:
| d + h | x 100 | = | 2 +2 | = | 4 | = | .095 x 100 = 9.5% |
| Total cases – (c + e) | 43 – (1+0) | 42 |
5. Default rate:
| k | x 100 | = | 1 | = | 1 | = | .024 x 100 = 2.4% |
| Total cases – (c + e) | 43 – (1+0) | 42 |
6. Cohort failure rate:
| i + k | x 100 | = | 1+ 1 | = | 2 | = | .048 x 100 = 4.8% |
| Total cases – (c + e) | 43 – (1+0) | 42 |
Answers to Exercise 7
Calculation of Indices for Contact Investigation
1. Cohort failure rate:
| # of contacts identified | = | 294 | = | 7 |
| # of pulmonary cases | 42 |
2. Percent smear positive cases with >0 contacts identified:
| # smear positive cases with # identified >0 | = | 19 | = | .95 x 100 = 95% |
| # smear positive cases | 20 |
3. Percent contacts of smear positive cases evaluated:
| # contacts of smear positive cases evaluated | = | 182 | = | .90 x 100 = 90.1% |
| # contacts of smear positive cases | 202 |
4. Percent contacts of smear positive cases completing treatment for LTBI:
| # contacts of smear positive cases comp. trtmt for LTBI | = | 10 | = | .217 x 100 = 21.7% |
| # contacts of smear positive cases started trtmt for LTBI | 46 |
Last Reviewed: 05/18/2008
Content Source: Division of Tuberculosis Elimination
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
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