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 | |||