Table 3 Various types of coverage terms used in PCT evaluations and definitions based on GPELF (Global Programme to Eliminate LF)
Coverage term | Definition | References and comments |
|---|---|---|
Reported coverage | “Intervention coverage calculated from data reported by all drug distributors” | [43]; often much higher than compliance/drug coverage/survey coverage |
Programme coverage/ epidemiological drug coverage | “Proportion of individuals in the implementation unit who have ingested the MDA drugs of the total population in the implementation unit” | [43]; denominator is total population |
Drug coverage | “Proportion of individuals, expressed as a percentage, in a targeted population who swallowed a drug, or a combination of drugs” | [43]; denominator is eligible/targeted population |
Surveyed coverage | “Total number of individuals identified by household survey as having ingested the drugs over the total number of individuals residing in all the surveyed households about whom information on drug ingestion could be elicited” | Relies on self-reporting by participants; subject to recall bias or participants’ assumptions about correct answers to give [25, 43] |
Geographical coverage | “Proportion of administrative units that are implementing MDA of all those that require MDA.” | [43]; focus on distribution rather than ingestion |