Table 3.
Conditional Probabilities of Any Admission, by a Specific Time Period Given Group Designation
| Conditional probability of | Formulaa | Resulting probability |
|---|---|---|
| Any admission at time of first emergency department visit, given that HIE is used in emergency department (test group) | 269/933 | 0.288 or 29% |
| Any admission at time of first emergency department visit, given that HIE is used in emergency department (control group) | 321/876 | 0.366 or 37% |
| Any admission at time of second emergency department visit, given that HIE is used in emergency department (test group) | 664/933 | 0.711 or 71% |
| Any admission at time of second emergency department visit, given that no HIE is used in emergency department (control group) | 555/876 | 0.633 or 63% |
a
Results were double-checked by calculating conditional probabilities for 2 independent events: probability of any admission by a certain emergency department visit and the probability of whether HIE was used in the emergency department. HIE indicates health information exchange.