Table 1: Differences between theNational Emergency Department of Information System (NEDIS)and theCheonan Injury Surveillance System(CISS).
| Items | NEDIS | CISS |
| Data entry | Emergency medical centers | Emergency medical centers, rescue teams of fire departments |
| Timing of data entry | Periodically recorded using an automatic OCS data recording program | Manually recorded by each fire department or emergency medical center. |
| Responsibility | National Emergency Medical Center | Cheonan City |
| Access time of data | 2-3 months | Immediate |
| Data type | Standard | Specific |
| Basis | Mandatory | Voluntary |