Table 1. Approaches for calculating catastrophic cost.

Approaches	Indirect cost calculation method	Denominator of catastrophic cost
HCA1	Human capital approach (using minimum wage rate for all)	Self-reported pre-TB household income
HCA2	Human capital approach (using reported patient wage for employed patient and minimum wage rate for others)	Self-reported pre-TB household income
OA1	Output approach (difference between self-reported household income before TB and during treatment)	Self-reported pre-TB household income
HCA3	Human capital approach (using minimum wage rate for all)	Self-reported pre-TB household expenditure
HCA4	Human capital approach (using reported patient wage for employed patient and minimum wage rate for others)	Self-reported pre-TB household expenditure
OA2	Output approach (difference between self-reported household income before TB and during treatment)	Self-reported pre-TB household expenditure

Notes: HCA1: Human capital approach where hours spent was calculated using minimum wage rate for all and household income as denominator; HCA2: Human capital approach where hours spent was calculated using combination of patient wage and minimum wage and household income as denominator; OA1: Output approach with household income as denominator; HCA3: Human capital approach where hours spent was calculated using minimum wage rate for all and household expenditure as denominator; HCA4: Human capital approach where hours spent was calculated using combination of patient wage and minimum wage and household expenditure as denominator; OA2: Output approach with household expenditure as denominator.