Table 2 System attributes evaluated
Attribute | Description/rational | Measuring unit/data source | Formula/calculation |
|---|---|---|---|
Usefulness | CBS can contribute to the prevention and control of adverse health-related events | % of alerts escalated % of alerts responded to Qualitative data from community and MoHD | Alerts escalated or closed (thus previously escalated) that were triggered within the reporting period out of total alerts triggered (also including alerts with the statuses open and dismissed). Escalated alerts that were closed, indicating that a response has happened, whether after referral to the health facility or at community level. Documented response (at least investigation) – by MoH, referral to health facility or national society (e.g., community response by volunteers or mobile clinic). Diagnostic tests or assessments are not the role of SRCS and the volunteers and information is not always available to supervisors and volunteers when documenting the alerts. |
Flexibility | Possibility to adjust the programme to include new diseases or case definitions | Key features and events of the programme | NA |
Simplicity | System to be as simple as possible to ensure ease of operation | Key features of the programme Proportion of signals matched the CCD in Nyss Qualitative data from volunteers | Kept signals/events of all signals (incl. dismissed/false signals). |
Data quality | completeness and validity of the data recorded | % of all reports sent in correct format % of volunteers submitting weekly signals or zero reports | Reports sent in correct format, compared to number of reports sent incorrectly. At least one report per volunteer per week by expected reports from each volunteer. |
Acceptability | Willingness of stakeholders to participate in CBS | Qualitative data from the community leaders and MoHD | NA |
Sensitivity | The ability of a surveillance or reporting system to detect all true health events | Documented alert outcomes in Nyss: % of alerts that were confirmed after escalation to MoHD | Number of alerts confirmed, compared to all alerts escalated (incl. dismissed by MoHD). |
Timeliness | Duration between the actions in CBS | % of CBS events verified within 12 h in Nyss % of alerts responded to with 48 h | Events that were verified by supervisor within 12 h (time between signal was triggered and kept/dismissed) compared to all events verified. Time between escalation and closure of alerts with documented response. |