Table 2. Results of external data verification over 2014 of 15 hospitals registering in the Dutch Lung Cancer Audit for Surgery (DLCA-S).
| Verified items | N (%) |
|---|---|
| Case ascertainment | |
| Number of patients verified on presence in the DLCA-S | 829 (100.0) |
| Patients verified and registered | 824 (99.4) |
| Patients verified and wrongly not registered | 5 (0.6) |
| Wrongly not registered and deceased | 0 (0) |
| Wrongly not registered and with a complicated course | 3 (0.4) |
| Total number of patients registered by selected hospitals | 824 |
| Mortality | |
| Number of patients in sample test | 388 (100.0) |
| Mortality status according to EPR | 381 (98.2) |
| Mortality status not according to EPR | 7 (1.8) |
| According to EPR ‘deceased’ but registered as ‘alive’ | 0 (0) |
| According to EPR ‘alive’ but registered as ‘deceased’ | 0 (0) |
| According to EPR ‘alive’ but no value registered | 7 (1.8) |
| Complicated course | |
| Number of possible complications^ | 6,596 (100.0) |
| Number of complications according to EPR | 6,380 (96.7) |
| Number of complications not according to EPR | 216 (3.3) |
| Complications not registered (‘no’ or no value) | 179 (2.7) |
| Complications wrongly registered (wrong value) | 37 (0.6) |
Case ascertainment: agreement between patients on a list extracted from the hospital’s administrative system and patients registered in the DLCA-S. Mortality: mortality within 30 days after surgery or during hospital stay. Complicated course: mortality within 30 days after surgery or during hospital stay, a performed re-intervention, or a length of hospital stay of >14 days in combination with one or more complications. ^, possible complications: number of patients in sample test (n=388) × the number of registrable complications in each patient (n=17). EPR, electronic patient records.