Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of matching of cases to control patients using four major criteria
| Proportion of cases matched to control patients | ||
| Criterion | n/n | % |
| Same primary diagnosis | 35/36 | 97 |
| Same duration of stay in ICU (± 5 days) | 31/36 | 86 |
| Same APACHE II score (± 5) | 29/36 | 81 |
| Same age (± 5 years) | 27/36 | 75 |
APACHE, Acute Physiology and Chronic Health Evaluation; ICA, intensive care unit.
