Home blood pressure monitors inaccurate 70 percent of the time?

An Assessment of the Accuracy of Home Blood Pressure Monitors When Used in Device Owners – American Journal of Hypertension (free)

Commentaries: Home blood pressure monitors inaccurate 70 percent of the time, study finds – MedicalXpress (free) AND Home blood pressure monitors may not be accurate enough – Reuters Health (free)

Small study (85 patients) suggests many of the devices are too inaccurate to be useful.