Influenza Immunization According to Staff Characteristics
| Mantel Haenszel | |||||||
|---|---|---|---|---|---|---|---|
| Characteristic | Intervention Clinics % (n/n) | Control Clinics % (n/n) | Rate Difference % | Rate Ratio (95% CI) | PValue | Rate Ratio (95% CI) | PValue |
| a Data from pretrial questionnaire. | |||||||
| Previous season vaccination | 1.82 (1.41–2.36) | <.001 | |||||
| Not vaccinated | 38.7 (46/119) | 18.6 (27/145) | 20.1 | 2.08 (1.38–3.12) | <.001 | ||
| Vaccinated | 90.9 (40/44) | 58.3 (21/36) | 32.6 | 1.56 (1.16–2.09) | .001 | ||
| Sex | 1.98 (1.49–2.62) | <.001 | |||||
| Female | 51.2 (63/123) | 25.2 (36/143) | 26.0 | 2.04 (1.46–2.83) | <.001 | ||
| Male | 57.5 (23/40) | 31.6 (12/38) | 25.9 | 1.82 (1.06–3.12) | .021 | ||
| Chronic disease status | 2.08 (1.54–2.80) | <.001 | |||||
| No chronic disease | 51.5 (68/132) | 22.9 (33/144) | 28.6 | 2.25 (1.60–3.17) | <.001 | ||
| Chronic disease | 66.7 (12/18) | 47.1 (8/17) | 19.6 | 1.42 (0.78–2.58) | .241 | ||
| Profession | 1.94 (1.46–2.57) | <.001 | |||||
| Physician | 66.1 (41/62) | 32.2 (19/59) | 33.9 | 2.05 (1.36–3.10) | <.001 | ||
| Administration | 31.7 (13/41) | 22.0 (11/50) | 9.7 | 1.44 (0.72–2.87) | .296 | ||
| Nurse | 60.6 (20/33) | 25.7 (9/35) | 34.9 | 2.36 (1.26–4.41) | .004 | ||
| Pharmacist | 44.4 (12/27) | 24.3 (9/37) | 20.1 | 1.83 (0.90–3.71) | .090 | ||
| Age | 1.96 (1.47–2.60) | <.001 | |||||
| 22–49 y | 43.2 (32/74) | 25.5 (25/98) | 17.7 | 1.70 (1.11–2.60) | .024 | ||
| 50–66 y | 60.7 (54/89) | 27.7 (23/83) | 33.0 | 2.19 (1.49–3.22) | <.001 | ||
| Immunization desirability | 1.99 (1.49–2.65) | <.001 | |||||
| “It is desirable to immunize primary health clinic staff”a | 71.1 (54/76) | 42.2 (35/83) | 28.9 | 1.69 (1.26–2.25) | <.001 | ||
| “It is not desirable to immunize primary health clinic staff” (or “don’t know”) | 38.7 (12/31) | 5.0 (2/40) | 33.7 | 7.74 (1.87–32.08) | <.001 | ||
| Immunization risk | 2.11 (1.55–2.87) | <.001 | |||||
| “The vaccine cannot cause influenza”a | 74.3 (26/35) | 36.4 (20/55) | 37.9 | 2.04 (1.37–3.05) | <.001 | ||
| “The vaccine can cause influenza” (or “don’t know”) | 54.9 (39/71) | 25.4 (17/67) | 29.5 | 2.17 (1.36–3.43) | <.001 | ||