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Table 3 List of indicators and scores [1 (< 60%): weak performance; 2 (60–79%): moderate performance; 3 (≥80%) good performance] for data quality and completeness, timeliness, representativeness and flexibility used for the evaluation of the influenza sentinel surveillance system in the Democratic Republic of Congo, 2012–2015

From: Evaluation of the influenza sentinel surveillance system in the Democratic Republic of Congo, 2012–2015

IndicatorCalculation/data inputsData sourceIndicator valueScore
Data quality and completeness
• Proportion of SARI/ILI cases that meet the case definitionNumber of ILI/SARI cases that meet the case definition / Total number of ILI/SARI casesCase-based database97.4%3
 • Proportion of samples from ILI/SARI cases received with accompanying CIFNumber of samples from SARI/ILI cases received with accompanying CIF / Total number of samples received from SARI/ILI casesLaboratory log book and case-based database98.0%3
 • Proportion of forms without at least one inconsistent or missing value for key variablesaNumber of forms without at least one abnormal or missing value / Total number of formsCase-based database97.5%3
 • Proportion of good quality samples receivedNumber of good quality samples received / Total number of samples receivedCase-based database97.0%3
 • Proportion of sample with positive RNP resultsNumber of samples with a positive RNP result / Total number of samples testedCase-based database90.0%3
 • Proportion of sampled ILI/SARI cases with available laboratory resultsNumber of ILI/SARI cases with available laboratory results / Number of sampled ILI/SARI casesCase-based database99.0%3
 • Proportion of collected variables included in the WHO recommended minimum data collection standardNumber of collected variables within the WHO list / Number of WHO recommended variables.CIF and WHO guidelines for influenza sentinel surveillance.80.8%3
Timeliness
 • Proportion of SMS sent on timeNumber of SMS sent on time / Number of SMS sentAggregated data database80.0%3
 • Proportion of samples received within 72 h from collectionNumber of samples received within 72 h from collection / Number of samples receivedCase-based database96.3%3
 • Proportion of samples tested within one week from receiptNumber of samples tested within one week from receipt / Number of samples testedCase-based database90.0%3
 • Proportion of weekly reports issued within five days after the end of the reporting periodNumber of weekly reports issued within five days after the end of the reporting period / Number of weekly reports issuedWeekly reports audit75.0%2
Representativeness
 • Geographical coverageNumber of provinces covered by the influenza sentinel surveillance network / Total number of provincesGeographic distribution of sentinel sites.45.5%1
 • Inclusion of all age groupsAge distribution of cases SARI/ILI (median, minimum and maximum)Case based databaseMed.: 15 Y
Min.: 0 Y
Max.: 89 Y
3
Flexibility
 • Proportion of samples tested for pathogens other than influenzaNumber of samples tested for pathogens other than influenza / Number of samples tested for influenzaCase-based database37.3%1
 • Number of syndromes surveyed with the influenza surveillance systemTotal, respiratory, gastro-intestinal and malaria admissions/consultations reported in the aggregated data formAggregated data databaseQualitative assessment3
  1. Abbreviations: ILI influenza-like-illness, SARI severe acute respiratory illness, CIF case investigation form, RNP RiboNucleic Protein, WHO World Health Organization, SMS Short Message Service
  2. a Key variables evaluated for completeness and consistency of data collection forms: site, age/date of birth, sex, date of consultation admission, date of symptoms onset, date of sample collection and signs and symptoms included in the case definitions