Table 1.
Agreement statistics for Nielsen TDLinx (TDLinx) and Dun & Bradstreet (D&B), by food store and restaurant type, relative to field observations of food stores and restaurants in thirty-one census tracts in Durham County, NC, USA, July–August 2012
| Sensitivity* | ||||||
|---|---|---|---|---|---|---|
| TDLinx | D&B | TDLinx and/or D&B | ||||
| Food outlet category† | n | % | n | % | n | % |
| All food stores (n 174)‡ | 111¶ | 64 | 95** | 55 | 131 | 75 |
| Convenience stores | ||||||
| Conventional convenience store (n 75) | 65 | 87 | 43 | 60 | 65 | 87 |
| Gas station/kiosk (n 21) | 10 | 48 | 7 | 33 | 11 | 52 |
| Other (n 3) | 0 | 0 | 2 | 67 | 2 | 67 |
| Total (n 99) | 75 | 76 | 52 | 53 | 79 | 80 |
| Grocery and supermarket§ | ||||||
| Conventional supermarket (n 21) | 20 | 95 | 17 | 81 | 20 | 95 |
| Supercenter (n 4) | 3 | 75 | 1 | 25 | 3 | 75 |
| Superette (n 24) | 10 | 42 | 14 | 58 | 16 | 67 |
| Natural/gourmet foods (n 2) | 0 | 0 | 1 | 50 | 1 | 50 |
| Total (n 52) | 33 | 63 | 34 | 65 | 41 | 79 |
| Small specialty food stores | ||||||
| Retail bread/baked goods (n 6) | 0 | 0 | 4 | 67 | 4 | 67 |
| Dairy products stores (n 2) | 0 | 0 | 0 | 0 | 0 | 0 |
| Fruit and vegetable markets (n 2) | 0 | 0 | 1 | 50 | 1 | 50 |
| Meat and fish markets (n 2) | 1 | 50 | 1 | 50 | 2 | 100 |
| Other (n 6) | 0 | 0 | 1 | 17 | 1 | 17 |
| Total (n 18) | 1 | 6 | 7 | 29 | 8 | 44 |
| Wholesale club (n 1) | 1 | 100 | 0 | 0 | 1 | 100 |
| Other food stores (n 3) | 0 | 0 | 1 | 33 | 1 | 33 |
| All restaurants (n 337) | N/A | 228†† | 68 | N/A | ||
| Counter-service restaurants | ||||||
| Café/doughnut/coffee/bagel restaurant/ice cream parlour (n 29) | N/A | 13 | 45 | N/A | ||
| Deli (n 16) | N/A | 9 | 56 | N/A | ||
| Lunchroom/cafeteria (n 2) | N/A | 0 | 0 | N/A | ||
| Snack and non-alcoholic beverage bars (n 1) | N/A | 0 | 0 | N/A | ||
| Other (n 56) | N/A | 40 | 71 | N/A | ||
| Total (n 104) | N/A | 62 | 57 | N/A | ||
| Fast-food restaurants | ||||||
| Fast-food chain (n 79) | N/A | 64 | 81 | N/A | ||
| Fast-food non-chain (n 14) | N/A | 10 | 71 | N/A | ||
| Total (n 93) | N/A | 74 | 80 | N/A | ||
| Sit-down restaurants|| | ||||||
| Fine dining (n 14) | N/A | 12 | 86 | N/A | ||
| Full-service & family restaurants (n 114) | N/A | 78 | 68 | N/A | ||
| Other (n 3) | N/A | 0 | 0 | N/A | ||
| Total (n 133) | N/A | 91 | 68 | N/A | ||
| Other restaurants (n 7) | N/A | 1 | 14 | N/A | ||
N/A, not applicable.
Match defined as a food store or restaurant observed in the field and listed in a secondary data source.
Food outlets that were classified as both a food store and a restaurant by the field auditors (n 10) were included in both the food store and restaurant counts, regardless of their classification in secondary data sources.
One food store was not given a category during the field audit.
One food store in the grocery and supermarket category was not given a sub-category during the field audit.
Two restaurants were not given a store sub-category during the field audit.
Three matches were categorized as ‘both food store and restaurant’ by the field team.
Eight matches were categorized as ‘both food store and restaurant’ by the field team.
Eight matches were categorized as ‘both food store and restaurant’ by the field team.