Single Entry, Double Entry, and Direct Electronic Capture
Table 1
Table
6 / 7
Table 1
Table
Table 1
| Approach | Strengths | Limitations | Common use |
|---|---|---|---|
| Single data entry | Fast, less resource-intensive | Higher transcription risk if source is paper | Routine eCRF entry with validation |
| Double data entry | Reduces transcription errors | Labor-intensive, slower | Critical paper CRF studies |
| Direct electronic capture | Real-time validation, fewer transcription steps | Requires devices, training, access control | REDCap eCRFs, surveys, tablet capture |
| Batch import | Efficient for repeated external data | Mapping and file-version risks | Laboratory and administrative data |