Measurements obtained in the 22 probes with more zero drift than predicted by the manufacturers
| Day No | No of zero drift readings | Zero drift (mm Hg) | |||
|---|---|---|---|---|---|
| Range | Mean | Median | SD | ||
| 1 | 5 | −5 to 11 | 0.60 | −3.00 | 6.54 |
| 2 | 4 | −11 to 20 | 2.75 | 1.00 | 13.45 |
| 3 | 5 | −24 to 15 | −1.20 | −4.00 | 15.38 |
| 4 | 1 | — | 35.00 | 35.00 | — |
| 5 | 1 | — | −17.00 | −17.00 | — |
| 7 | 2 | −18 to 35 | 8.50 | 8.50 | 37.47 |
| 8 | 3 | −10 to 12 | −2.33 | −9.00 | 12.42 |
| 9 | 1 | — | 14.00 | 14.00 | — |
The overall range and SD were only calculated for days when more than one reading was obtained.