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Table 3 Concentration indices for total costs, total costs as a proportion of pre-TB annual household income and catastrophic costs due to TB care, among TBa affected households in China (2017) (n = 1147)

From: Inequity in catastrophic costs among tuberculosis-affected households in China

Costs due to TB care

Concentration index (95% CI)*

Total costs

Total costs as proportion of AHI

Catastrophic costs

Pre-TB treatment

0.172 (0.113, 0.231)

−0.429 (− 0.528, − 0.331)

− 0.277 (− 0.327, − 0.227)

TB Treatment

0.199 (0.140, 0.259)

− 0.377 (− 0.449, − 0.305)

− 0.306 (− 0.351, − 0.261)

TB care (pre-TB treatment and treatment)

0.186 (0.145–0.228)

−0.402 (− 0.466, − 0.338)

−0.169 (− 0.197, − 0.141)

  1. TB Tuberculosis, AHI Pre-TB annual household income
  2. *All concentration indices were significantly away from the line of equality (P < 0.001)
  3. aDrug susceptible TB patients - China’s TB patient cost survey (2017)