Numbers of employees of the participating companies that were approached to complete the questionnaire, including employees that regularly pushed or pulled at work (exposed group) and employees without physically demanding tasks (reference group), and the numbers of respondents (response rate percentage) for each category
| Population | Response | |
|---|---|---|
| Rail catering company | ||
| Exposed group | 97 | 69 (71%) |
| Reference group | 33 | 22 (67%) |
| Flower auction 1 | ||
| Exposed group | 77 | 48 (62%) |
| Reference group | 56 | 48 (86%) |
| Flower auction 2 | ||
| Exposed group | 74 | 60 (81%) |
| Reference group | 41 | 35 (85%) |
| Nursing home | ||
| Exposed group | 136 | 121 (89%) |
| Reference group | 109 | 85 (78%) |
| Postal distribution centre | ||
| Exposed group | 112 | 68 (61%) |
| Refuse collection companies | ||
| Exposed group | 94 | 73 (78%) |
| Total | 829 | 629 (76%) |