Table 3.
Centre-wise attrition of DDSS usage and study data
| Centre A | Centre B | Centre C | Centre D | Total | |
| Patients seen in PAU | 2679 | 1905 | 1974 | 2437 | 8995 |
| Medical patients seen in PAU | 2201 | 1383 | 1405 | 1914 | 6903 |
| Number eligible for diagnostic decision support | unknown | unknown | unknown | unknown | unknown |
| DDSS attempts | 338 | 118 | 52 | 87 | 595 |
| DDSS successful log in | unknown | unknown | unknown | unknown | 226* |
| Step 1 completed† | 47 | 26 | 45 | 59 | 177 |
| Steps 1&2 completed | 30 | 25 | 20 | 50 | 125 |
| Medical records available | 24 | 24 | 16 | 40 | 104 |
* Each successful log in was automatically provided a unique study identifier which was not centre-specific. The number of successful log-ins was thus calculated as the total number of study identifiers issued by the trial website.
† Step 1 completed indicates that following successful log-in, the subject entered data on the first screen, i.e. patient details.