Year 1 | ||||
---|---|---|---|---|
3 μg ID (N= 378) |
6 μg ID (N= 375) |
15 μg IM (N= 376) |
Total (N= 1129) | |
Mean age ± standard deviation | 39 ± 11 | 39 ± 12 | 39 ± 12 | 39 ± 12 |
Male/female ratio | 0.6 | 0.7 | 1.0 | 0.7 |
History of influenza vaccination*, n (%) | 112 (29.6) | 114 (30.4) | 100 (26.6) | 326 (28.9) |
Reaction to previous influenza vaccination*, n (%) | 10 (8.9) | 9 (7.9) | 7 (7.0) | 26 (8.0) |
Year 2 | ||||
9 μg ID
( N = 544) |
15 μg IM
( N = 547) |
Total
( N = 1091) | ||
mean age +/- standard deviation | 40 ± 12 | 40 ± 12 | 40 ± 11 | |
Male/female ratio | 0.7 | 0.7 | 0.7 | |
Year 3 | ||||
9 μg ID
( N = 417) |
15 μg IM
( N = 411) |
Total
( N = 828) | ||
mean age +/- standard deviation | 41 ± 11 | 40 ± 11 | 40 ± 11 | |
Male/female ratio | 0.8 | 0.7 | 0.7 |