Table 1 Calculation of traditional and relaxed sensitivity and positive predictive value (PPV), and representativity
Outlet present (field) | Outlet absent (field) | |||
|---|---|---|---|---|
Outlet present (database) | True positive (TP) | False positive (FP) | ||
For traditional measures | For relaxed measures/ Representativity | For traditional measures | For relaxed measures/ Representativity | |
Match with respect to any name, location and category error | Match disregarding errors in name and imprecisions in location | Includes outlets mismatched due to name errors and imprecisions in location | Excluding outlets mismatched due to name errors and imprecisions in location | |
Outlet absent (database) | False negative (FN) | True negative (TN) | ||
For traditional measures | For relaxed measures/ Representativity | |||
Including outlets mismatched due to name errors and imprecisions in location | Excluding outlets mismatched due to name errors and imprecisions in location | |||