REDCap Data Quality Module
Table 1
Table
6 / 7
Table 1
Table
Table 1
| Check type | Example rule | Possible action |
|---|---|---|
| Missing required data | Primary outcome is blank | Raise query or confirm missing reason |
| Range check | Temperature outside plausible range | Verify against source document |
| Date logic | Follow-up date before enrollment date | Query site for correction |
| Duplicate check | Same participant ID appears twice | Confirm duplicate or legitimate repeat |
| Cross-form consistency | Death date present but participant marked alive | Query inconsistency |
| Visit window | Day 28 visit outside allowed range | Document deviation or correct date |
| Site trend | One site has unusually high missingness | Review workflow and retrain if needed |