Table 2.
Case Fatality Ratios and Associated 95% Confidence Intervals in Hong Kong and Toronto by Treatment Received within 2 Days of Hospital Admission, Estimated by Generalized Propensity Score Analysis
| Treatment | Hong Kong |
Toronto |
||||
|---|---|---|---|---|---|---|
| Case Fatality Ratioa (%) | 95% CI | P Valueb | Case Fatality Ratioa (%) | 95% CI | P Valueb | |
| Neither ribavirin nor corticosteroids | 15.4 | (13.2-17.6) | — | 16.6 | (0.0-44.9) | — |
| Ribavirin | 17.0 | (6.2-27.8) | .77 | 13.4 | (0.0-33.0) | .85 |
| Corticosteroids | 18.9 | (4.6-33.1) | .64 | — | — | — |
| Both | 19.2 | (14.2-24.3) | .16 | 18.7 | (0.0-54.7) | .93 |
CI = confidence interval.
a
Each case fatality ratio is the predicted case fatality ratio had all severe acute respiratory syndrome cases been assigned to the corresponding treatment group.
b
P value for a difference in case fatality ratio compared with no treatment.