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. Author manuscript; available in PMC: 2020 Nov 12.
Published in final edited form as: Trop Med Int Health. 2020 Feb 28;25(5):624–634. doi: 10.1111/tmi.13381

Figure 3. Concentration curves describing inpatient TB treatment costs.

Figure 3.

These four sets of concentration curves display the cumulative percentages of TB treatment costs against the cumulative percentage of the population ranked by household spending level from the poorest to the richest (x-axis). The two upper curves show the unequal distribution of out-of-pocket (OOP) costs (blue line) and total patient costs (grey line) for inpatient treatment of initial TB episodes (Panel A) and recurrent TB episodes (Panel B), in which patients with higher self-reported household expenditures also have higher costs of TB treatment. The two lower curves show TB treatment costs scaled as a fraction of household expenditure, revealing that – as a proportion of total household expenditure – the poorest individuals experienced the greatest scaled costs of TB treatment for both initial TB episodes (Panel C) and recurrent TB (Panel D).