TropicalMed, Vol. 7, Pages 441: Individuals’ Vulnerability Based Active Surveillance for TB: Experiences from India

Figure 1. Flowchart representing the process for individual-vulnerability-based active surveillance of TB.

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Table 1. Summary of TB cases that emerged from various vulnerability groups based on vulnerability scores.

Table 1. Summary of TB cases that emerged from various vulnerability groups based on vulnerability scores.

Vulnerability GroupsTotal Number of Individuals (a) (Mapped during Jan–July 2018)Out of (a), Number Developed Microbiologically Confirmed TB Disease Cases (Routine Program Data Jan–April 2019)RR (95% CI)Low vulnerability to the development of TB
(score of 0)17,905,748 (81.2%)824 (26.4%)1Moderate vulnerability to the development of TB
(scores 1–4)3,360,618 (15.3%)743 (23.8%)4.8 (4.3–5.3)High vulnerability to the development of TB
(scores ≥ 5)775,802 (3.5%)1554 (49.8%)43.4 (39.9–47.2)Total22,042,1683121

Table 2. Comparison of yields from population-based ACF during 2018 and individuals’-vulnerability-based ACF during 2019 and 2020.

Table 2. Comparison of yields from population-based ACF during 2018 and individuals’-vulnerability-based ACF during 2019 and 2020.

Population-Based ACF in 2018ACF among Individuals with High Vulnerability * to the Development of TB in 2019ACF among Individuals with High Vulnerability * to the Development of TB in 2020A. Total population of the state34,411,26734,545,86834,678,294B. Total individuals mapped for screening for TB1,600,000775,802976,147C. Out of (B), total individuals screened1,139,200 (71.2%)537,371 (69.3%)547,262 (56%)D. Out of (C), total presumptive pulmonary TB cases identified46,707 (4.1%)30,900 (5.7%)28,457 (5.2%)E. Out of (D), total tested for TB34,096 (73%)23,585 (76.3%)21,058 (74%)F. Out of E, total microbiologically confirmed pulmonary TB case diagnosed302 (0.9%)610 (2.6%)558 (2.6%)G. Number needed to test to detect one microbiologically confirmed pulmonary TB case (NNT)1123938H. Number needed to screen to diagnose one microbiologically confirmed pulmonary TB case (NNS)3772881980I. Microbiologically confirmed pulmonary TB cases diagnosed through ACF as a proportion of total microbiologically confirmed pulmonary TB cases in the state during the concerned period7.1%18.3%16.2%

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