Table 4.
AAMIa and BHSb grading of models with the data divided into three pressure categories.
| Category and grade | AAMIc mean difference between standard and test device (mmHg), absolute mean difference (SD) | Grade | BHSd absolute difference between standard and test device (mmHg) | ||||||||
|
|
|
|
≤5 | ≤10 | ≤15 | ||||||
| Grading criteria | |||||||||||
|
|
Passed | ≤5 (≤8) | A | 60% | 85% | 95% | |||||
|
|
Passed | ≤5 (>8) | B | 50% | 75% | 90% | |||||
|
|
Passed | >5 (≤8) | C | 40% | 65% | 85% | |||||
|
|
Failed | >5 (>8) | D | —e | — | — | |||||
| Age <60 years | |||||||||||
|
|
SBPf (passed) | 2.25 (7.69) | C | 43% | 83% | 93% | |||||
|
|
DBPg (passed) | 3.05 (6.07) | C | 49% | 85% | 99% | |||||
| Age ≥60 years | |||||||||||
|
|
SBP (passed) | 1.33 (9.73) | C | 41% | 66% | 87% | |||||
|
|
DBP (passed) | 0.09 (6.63) | A | 60% | 89% | 98% | |||||
aAAMI: Association for the Advancement of Medical Instrumentation.
bBHS: British Hypertension Society.
cTo meet AAMI criteria, the mean difference between the device and the mercury standard must be ≤5 mmHg or the SD must be ≤8 mmHg.
dTo meet BHS criteria, devices must achieve a grade of at least B for both systolic and diastolic measurements. Grade A denotes greatest agreement with mercury standard and D denotes least agreement.
eWorse than a C.
fSBP: systolic blood pressure.
gDBP: diastolic blood pressure.