John S. Webb

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Tablet ownership has grown rapidly over the last year. While market research surveys have helped us understand the demographics of tablet ownership and provided early insights into usage, there is little comprehensive research available. This paper describes a multi-method research effort that employed written and video diaries, in-home interviews, and(More)
In recent years, smartphone and tablet ownership has shown continued growth; however, there is a lack of research thoroughly investigating the use of these devices within the general public. This paper describes a large-scale diary study with U. S. mobile device owners, examining details of smartphone and tablet use. Results provide a comprehensive(More)
Episodic hypertension, maximum systolic blood pressure (SBP), and visit-to-visit variability in SBP between clinic appointments were strong predictors of incident and recurrent cardiovascular events in 5 large cohorts. Calcium channel blockers (CCBs) and thiazide diuretics reduced maximum SBP and SBP variability in the Anglo-Scandinavian Cardiac Outcomes(More)
P atients with episodic hypertension in clinic after a previous transient ischemic attack or stroke have a high risk of recurrent stroke, 1,2 residual visit-to-visit variability in blood pressure (BP) on antihypertensive treatment has a poor prognosis despite good control of mean BP, 1,2 and benefits of some antihypertensive drugs in the prevention of(More)
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