Food Hygiene Rating Scheme Audit of Display and Business Survey 2021: Technical report
FHRS Audit 2021 Technical report: Weighting
Information on how the data collected from the fieldwork and audit was weighted to make it representative of the population.
In line with standard market research practice, the data collected from the audit and telephone survey of food businesses was weighted to make it representative of the underlying population. Weighting the data was necessary because of the deliberate decision to stratify interviews to ensure sufficient base sizes were achieved by country and FHRS rating.
Weights were applied to the data to make it representative of the target population within each country. The weights were informed by the profile of the underlying population of businesses in terms of sector and FHRS. Data on the underlying population was sourced from FSA’s FHRS database and IDBR and is presented in Tables 5.1.
Table 5.1 : Profile of the underlaying business population by sector and FHRS rating within country
Sector
| Sector | England | Northern Ireland | Wales |
|---|---|---|---|
| Accommodation and pubs/bars/nightclubs | 18.82% | 16.37% | 23.95% |
| Restaurants/cafes/canteens and other catering | 38.91% | 39.71% | 36.91% |
| Retail | 26.41% | 27.75% | 25.67% |
| Takeaways/sandwich shops | 15.85% |
16.17% |
13.48% |
FHRS rating
| FHRS rating | England | Northern Ireland | Wales |
|---|---|---|---|
| 0 to1 | 2.06% | 0.38% | 2.04% |
| 2 | 2.08% | 0.64% | 1.78% |
| 3 | 8.76% | 4.48% | 9.45% |
| 4 | 18.42% |
17.18% |
21.93% |
| 5 | 68.68% | 77.32% | 64.81% |