Table 7.

Concentration indices for total costs, total costs as a proportion of pre-TB annual household income and catastrophic costs due to TB diagnosis, stratified by Axshya SAMVAD and non-Axshya SAMVAD groups, among TB (new sputum-smear-positive) affected households in India, 2016–2017 (N = 451).

	Axshya SAMVAD		Non-Axshya SAMVAD
Characteristics	Concentration index (95% CI)	p valuea	Concentration index (95% CI)	p valuea	Dominance test [30]b
Total costs	−0.15 (−0.32. 0.11)	0.068	−0.06 (−0.20, 0.08)	0.401	Non-dominance (both curves not significantly different)
Total costs as a proportion of pre-TB annual household income	−0.77 (−1.14, −0.40)	<0.001	−0.63 (−092, −0.34)	<0.001	Axshya SAMVAD dominates over non-Axshya SAMVAD
Catastrophic costsc	−0.60 (−0.81, −0.39)	<0.001	−0.58 (−0.78, −0.38)	<0.001	Non-dominance (both curves not significantly different)

TB: tuberculosis; SAMVAD: sensitisation and advocacy in marginalised and vulnerable areas of the district; Axshya SAMVAD: an active case finding strategy under project Axshya implemented by The Union, South East Asia office, New Delhi, India, across 285 districts of India; non-Axshya SAMVAD: patients detected through passive case findings.

^a p value for the concentration index: indicates whether the concentration curve is significantly different from the line of equality.

^bFor details on the dominance test, readers are requested to refer to O’Donnell et al. [30].

^cTotal costs due to TB diagnosis more than 20% of pre-TB annual household income.