“…mask 50 % effective) Based on assumptions from previous study Chen et al 2008 [ 33 ] where mask efficacies are assumed to be 60 %, 70 %, 80 %, or 95 % and are combined in the model with other control measures | Laboratory data, Lee et al 2008 [ 52 ], and a randomised control trial by Aiello et al 2010 [ 26 ] that found hand hygiene and facemask together were 35-51 % effective but not facemask use alone | No data cited for exposure reduction, these are assumptions. Failure rate estimate from a hospital simulation study Seet et al 2009 [ 32 ] | Laboratory data from Balazy et al 2006 [ 30 ] used to build particle transmission model | Reported none available | Reported none available | Type of economic evaluation | Cost-effectiveness analysis | Cost-effectiveness analysis | Cost-effectiveness analysis | Cost-effectiveness analysis | Cost-effectiveness analysis | Cost-effectiveness analysis | Cost-effectiveness analysis |
Perspective | Policy developer view | Not stated | Not stated | Healthcare institution | Not stated | Not stated | Not stated |
Primary outcome measure | Total costs of intervention | Unit cost per person, per year | Net savings compared to no intervention | Incremental increase in cost per death averted | Productivity loss to economy from absenteeism | Cost of respirator use per case prevented and per life saved | Minimum estimates of cost per life saved and cost per death averted |
Intervention outcome measures | Cases | Cases | Cases, deaths, hospitalisations | Cases, deaths | Deaths, hospitalisation, outpatient visits, absenteeism | HCW PPD test conversion rates | Patients isolated for suspected TB, confirmed cases pulmonary TB in patients and active pulmonary TB in HCWs |
PPE personal protective equipment, PPD positive protein derivative skin test, TB tuberculosis, HCW healthcare worker, SARS severe acute respiratory syndrome, HEPA high-efficiency particulate air, PARP powered air purifying respirator, DM dust-mist, DMF dust-mist-fume …”