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Characteristics of Study Population by 1976 vaccination status.
| Received 1976 vaccine (n = 46) | No 1976 vaccine (n = 70) | P-value | |
|---|---|---|---|
| Age (SD), y | 60.8 (3.8) | 59.7 (5.5) | 0.56 |
| Women, No. (%) | 29 (41.3) | 52 (25.7) | 0.08 |
| Chronic medical condition, No. (%) | 17 (37.0) | 27 (38.6) | 0.86 |
| 2008 Seasonal vaccine, No. (%) | 45 (97.8) | 61 (87.1) | 0.044 a |
p < 0.05 by Chi-squared test
