Health Impact of Realistic Consumable Availability Scenarios

[sakshimohan]

This PR estimates the health impact of increasing consumable availability to realistic levels. Realistic levels lie somewhere between default and all as predicted by the regression model or by assuming that all facilities perform as well as the facility at the nth percentile in terms of consumable availability.

Changes:

1. Add scripts to prepare HHFA data and run regression analysis to determine factors associated with consumable availability
2. Update ResourceFile_consumables_amatched.csv to include a crosswalk between names of consumables in the TLO model and that under HHFA
3. Predict change in consumable availability under various scenarios
4. Change healthsystem.py and consumables.py to accommodate specification of which consumable availability estimates to use
5. Introduce a scenario which runs the model with a different set of availability estimates from the original estimates.

[sakshimohan]

Current consumable availability under various scenarios. All scenarios only affect levels 1a and 1b:

1. Scenario 1: All items perform as well as consumables other than drugs/diagnostic tests
2. Scenario 2: 1 + All items perform as well as consumables classified as 'Vital' in the Essential Medicines List
3. Scenario 3: 2 + All facilities perform as well as those in which consumables stock is managed by pharmacists
4. Scenario 4: 3 + Level 1a facilities perform as well as level 1b
5. Scenario 5: 4 + All facilities perform as well as CHAM facilities
6. Scenario 6: All facilities have the same probability of consumable availability as the 75th percentile best performing facility for each individual item
7. Scenario 7: All facilities have the same probability of consumable availability as the 90th percentile best performing facility for each individual item
8. Scenario 8: All facilities have the same probability of consumable availability as the 99th percentile best performing facility for each individual item

[sakshimohan]

Overall change in availability -
available_prop 0.49289695774871195
available_prop_scenario1 0.520910
available_prop_scenario2 0.523982
available_prop_scenario3 0.527928
available_prop_scenario4 0.529791
available_prop_scenario5 0.531345
available_prop_scenario6 0.513739
available_prop_scenario7 0.540825
available_prop_scenario8 0.575753