Impact of each letter on staff uptake of the seasonal influenza vaccination. Exact 95% binomial CIs are presented in parentheses below the uptake proportion
| Standard group | Descriptive norms group | Injunctive norms group | Combination group | |||||
| n | Uptake proportion (95% CI) | n | Uptake proportion (95% CI) | n | Uptake proportion (95% CI) | n | Uptake proportion (95% CI) | |
| Total | 1885 | 0.43 (0.41 to 0.45) | 1885 | 0.43 (0.41 to 0.46) | 1885 | 0.43 (0.41 to 0.45) | 1885 | 0.43 (0.41 to 0.45) |
| Gender | ||||||||
| Female | 1392 | 0.43 (0.40 to 0.46) | 1415 | 0.43 (0.40 to 0.46) | 1390 | 0.44 (0.41 to 0.46) | 1403 | 0.44 (0.41 to 0.46) |
| Male | 493 | 0.43 (0.39 to 0.48) | 470 | 0.45 (0.40 to 0.49) | 495 | 0.42 (0.37 to 0.46) | 482 | 0.41 (0.37 to 0.46) |
| Employmenttype | ||||||||
| Bank | 320 | 0.26 (0.22 to 0.31) | 320 | 0.23 (0.19 to 0.28) | 320 | 0.24 (0.20 to 0.29) | 320 | 0.23 (0.18 to 0.28) |
| Substantive | 1565 | 0.47 (0.44 to 0.49) | 1565 | 0.48 (0.45 to 0.50) | 1565 | 0.47 (0.45 to 0.50) | 1565 | 0.47 (0.45 to 0.50) |
| Job types | ||||||||
| Medical and dental staff | 285 | 0.46 (0.40 to 0.52) | 285 | 0.46 (0.40 to 0.52) | 285 | 0.46 (0.40 to 0.52) | 285 | 0.47 (0.41 to 0.53) |
| Nursing, midwifery and health visiting staff | 1095 | 0.45 (0.43 to 0.48) | 1095 | 0.43 (0.40 to 0.46) | 1095 | 0.45 (0.42 to 0.48) | 1095 | 0.43 (0.40 to 0.46) |
| Healthcare assistants, other support staff, Scientific, therapeutic and technical staff | 505 | 0.36 (0.32 to 0.40) | 505 | 0.43 (0.39 to 0.47) | 505 | 0.38 (0.34 to 0.43) | 505 | 0.41 (0.37 to 0.45) |