Table III.
Gender, age, and questionnaire answers in the vitamin D and placebo groups in relation to vitamin D study.
| Study | Females/males | Age, median (range) y | Vaccine yes/no a | Vitamin D group
|
Placebo group
|
||||
|---|---|---|---|---|---|---|---|---|---|
| Answered ‘yes’ to influenza
|
Answered ‘no’ | Answered ‘yes’ to influenza
|
Answered ‘no’ | ||||||
| Classified as influenza b | Influenza unlikely | Classified as influenza b | Influenza unlikely | ||||||
| Tromsø 1 | 150/202 | 65 (40–82) | 190/162 | 18 | 8 | 148 | 23 | 9 | 146 |
| Tromsø 2 | 45/33 | 55 (34–73) | 38/40 | 3 | 2 | 37 | 1 | 3 | 32 |
| Tromsø 3 | 8/9 | 56 (38–72) | 11/6 | 1 | 1 | 9 | 0 | 0 | 6 |
| Vienna | 7/13 | 61 (32–72) | 0/8 | 1 | 1 | 8 | 0 | 4 | 6 |
| Seattle | 1/6 | 60 (46–76) | 4/3 | 0 | 0 | 3 | 1 | 0 | 3 |
| Dundee 1 | 10/12 | 77 (70–84) | 17/5 | 0 | 0 | 12 | 0 | 0 | 10 |
| Dundee 2 | 6/25 | 69 (50–82) | 26/5 | 0 | 0 | 15 | 0 | 0 | 16 |
| Dundee 3 | 1/4 | 69 (58–74) | 5/0 | 0 | 0 | 4 | 0 | 0 | 1 |
| Aarhus | 13/3 | 65 (33–77) | 4/12 | 1 | 1 | 6 | 1 | 0 | 7 |
| Leuven | 1/20 | 72 (56–82) | 19/2 | 1 | 0 | 9 | 0 | 0 | 11 |
| Total | 242/327 | 63 (32–84) | 314/243 | 25 | 13 | 251 | 26 | 16 | 238 |
a
Not all subjects answered this question.
b
Answered ‘yes’ to the question on influenza and in addition had fever plus 2 of the following 6 symptoms: cough, sore throat, limb or joint pain, runny nose, headache, and vomiting or diarrhoea.