Table 2. Presence of dysarthria/dysphagia, facial weakness, encephalitis, and immunocompromised status among patients with and without respiratory failure due to West Nile virus infection.
| Variable | Respiratory failure (N = 12*) | No respiratory failure (N = 20) | Odds ratio | p value† |
|---|---|---|---|---|
| Dysarthria/dysphagia | 11 | 3 | 62 | <0.0001 |
| Immunocompromised status | 4 | 0 | Undefined | 0.01 |
| Encephalitis | 12 | 5 | Undefined | <0.0001 |
| Facial nerve weakness | 6 | 5 | 3 | 0.25 |
*Includes 1 patient with respiratory weakness secondary to Guillain-Barré–like syndrome. †Fisher exact test.