Table 2.
Characteristics of vaccinated-cohort narcolepsy cases by chart-confirmed diagnosis category
| Narcolepsy with cataplexy (n=6) | Narcolepsy without cataplexy (n=10) | Unknown diagnosis (n=3) | Total (n=19) | |
|---|---|---|---|---|
| Age group, years | ||||
| 0 – 9 | 0 | 0 | 0 | 0 |
| 10 – 19 | 5 | 4 | 2 | 11 |
| 20 – 29 | 1 | 6 | 1 | 8 |
| Received influenza vaccine during: | ||||
| 2009 pandemic only | 2 | 5 | 1 | 8 |
| 2010–2011 season only | 3 | 2 | 0 | 5 |
| Both | 1 | 3 | 2 | 6 |
| Symptom onset in relation to receipt of vaccine | ||||
| Before A(H1N1)pdm09 vaccines available | 5 | 6 | 1 | 12 |
| Within 180 days post-MIV | 0 | 0 | 0 | 0 |
| Within 180 days post-MLAIV | 0 | 0 | 0 | 0 |
| Within 180 days post-2010–2011 TIV | 1 | 1 | 0 | 2 |
| More than 180 days post-MIV | 0 | 2 | 0 | 2 |
| Not documented; received MIV | 0 | 1 | 1 | 2 |
| Not documented; received MLAIV | 0 | 0 | 1 | 1 |
Abbreviations: MIV = monovalent inactivated vaccine; MLAIV = monovalent live attenuated influenza vaccine; TIV = trivalent inactivated vaccine.