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. 2019 Apr 26;14(4):e0214783. doi: 10.1371/journal.pone.0214783

Table 3. Catastrophic out-of-pocket payments on medicines for Iran.

Thresholds 40% 30% 20% 10% 40% 30% 20% 10% 40% 30% 20% 10%
Scenarios of medicine consumption Share of capacity to pay exceeds thresholds (percentage) Percentage of CHE caused by purchasing medicines (gap)* Number of households exposed to CHE**
Before any medicine consumption 3.6 6.9 13.3 27.3
After purchasing amoxicillin 3.7 7.1 13.9 28.6 0.1 0.2 0.6 1.3 20 41 122 264
After purchasing atorvastatin 3.7 7.1 13.8 28.3 0.1 0.2 0.5 1 16 32 80 159
After purchasing metformin 3.7 7.2 14 28.8 0.1 0.3 0.7 1.5 3 10 23 49
After purchasing amoxicillin &atorvastatin 3.8 7.4 14.4 29.8 0.2 0.5 1.1 2.5 - - - -
After purchasing amoxicillin & metformin 3.9 7.6 14.6 30.4 0.3 0.7 1.3 3.1 - - - -
After purchasing atorvastatin & metformin 3.9 7.5 14.5 30.2 0.3 0.6 1.2 2.9 - - - -
After purchasing amoxicillin & atorvastatin & metformin 4 7.8 15.3 31.9 0.4 0.9 2 4.6 - - - -
After purchasing Glucophage 4.6 9.1 17.5 37 1 2.2 4.2 9.7 33 72 137 315
After purchasing Lipitor 8.4 15 27.5 55.1 4.8 8.1 14.2 27.8 764 1289 2259 4423
After purchasing Glucophage & Lipitor 11.4 19.4 34.2 64.9 7.8 12.5 20.9 37.6 - - - -

*"Percentage of CHE caused by purchasing medicines" equals "Percentage of CHE exceeding thresholds" minus "Share of capacity to pay exceeding thresholds before purchasing medicines".

** The CHE percentage, the sample size and the prevalence were multiplied when calculating the number of households exposed to CHE. For scenarios with more than one medicine to be purchased, the prevalence of different diseases were multiplied to calculate the probability of occurrence. Therefore, a smaller number was obtained. In this case, the CHE percentages are only reported.