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Table 5 Indicators for utility and sustainability used for the evaluation of the influenza sentinel surveillance system in Zambia, 2011-2017a

From: An evaluation of the Zambia influenza sentinel surveillance system, 2011–2017

IndicatorCalculation/data inputsData sourceIndicator valueScore
• Proportion of weeks with data reported to WHO FluNetNumber of weeks with data reported to WHO FluNet / Number of weeks during the evaluated periodWeekly FluNet submissions98.4%3
• Mean annual number of samples shared with WHO Collaborating Centers (WHO CC)Number of samples/isolates shared with WHO CC / Number of years with samples shipped.Shipment logs to WHO CC London23 (range 14–33) shipped during 2012 and 2014–20173
• Number of contributions to influenza Regional/Global studiesNumber of publications on Regional/Global studies with influenza data from ZambiaPubMed2 [8,28]2
• Ability to assess important influenza epidemiological features/public health outcomes• Temporal patters of influenza virus circulation (Yes) [3]Publications and reports80.0%b3
• Circulating influenza types/subtypes, including pandemic strains (Yes) [3]
• Proportion of ILI/SARI illness attributable to influenza virus infection (Yes) [3]
• Risk factors for influenza-associated severe illness (No)
• Burden of influenza-associated illness (Yes) [14]
• Proportion of the ISSS cost covered by the Zambia-MoHCost covered by the Zambia-MoH / Total costBudget report16.9%1
• Availability and implementation of a sustainability plan• Drafted (Yes)Sustainability plan25.0%b1
• Finalized (No)
• Approved (No)
• Implemented (No)
  1. Abbreviations: MoH Ministry of Health
  2. aEach quantitative indicator was evaluated as the proportion (expressed as percentage) of the outcome of interest over the total. A scale from 1 to 3 was used to provide a score for each quantitative indicator as follows: < 60% (from the above calculation) scored 1 (weak performance); 60–79% scored 2 (moderate performance); ≥80% scored 3 (good performance). For indicators for which a proportion over a total could not be obtained (qualitative indicators) a score was assigned based on the same scale using expert consensus
  3. bIndicator value calculated by dividing the number of achieved outcome by the total number of outcome considered (i.e. 4/5 = 80.0% or 1/4 = 25.0%)