Table 1.

Mean difference against reference standard at all testing intervals

Pressure range, mmHgMean difference, mmHg (95% CIs)Error of the mean difference, %
00.0 (−0.01 to 0.01)
500.15 (0.01 to 0.30)0.30
1000.42 (0.21 to 0.62)0.42
1501.15 (0.32 to 1.98)0.76
2001.14 (0.84 to 1.44)0.57
2501.41 (1.04 to 1.78)0.56
3001.90 (1.48 to 2.33)0.63
  • Pressure is checked in 50 mmHg increments from 0–300 mmHg and in 50 mmHg increments down again. The data at each testing interval between 0–250 mmHg going up have been combined with the data going down.