Roger B. Davis

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CONTEXT A prior national survey documented the high prevalence and costs of alternative medicine use in the United States in 1990. OBJECTIVE To document trends in alternative medicine use in the United States between 1990 and 1997. DESIGN Nationally representative random household telephone surveys using comparable key questions were conducted in 1991(More)
BACKGROUND Although computerized physician order entry reduces medication errors among inpatients, little is known about the use of this system in primary care. METHODS We calculated the override rate among 3481 consecutive alerts generated at 5 adult primary care practices that use a common computerized physician order entry system for prescription(More)
CONTEXT Complementary and alternative medicine (CAM) use by US adults increased substantially between 1990 and 1997, yet little is known about more recent trends. OBJECTIVE Compare CAM therapy use by US adults in 2002 and 1997. DESIGN Comparison of two national surveys of CAM use by US adults: (1) the Alternative Health/Complementary and Alternative(More)
OBJECTIVE This study presents data on the use of complementary and alternative therapies to treat anxiety and depression in the United States. METHOD The data came from a nationally representative survey of 2,055 respondents (1997-1998) that obtained information on the use of 24 complementary and alternative therapies for the treatment of specific chronic(More)
OBJECTIVE To investigate whether placebo effects can experimentally be separated into the response to three components-assessment and observation, a therapeutic ritual (placebo treatment), and a supportive patient-practitioner relationship-and then progressively combined to produce incremental clinical improvement in patients with irritable bowel syndrome.(More)
BACKGROUND Prayer is a common practice in the United States, yet little is known about the prevalence and patterns of use of prayer for health concerns. OBJECTIVE To determine the prevalence and patterns of use of prayer for health concerns. METHODS We conducted a national survey in 1998 (N = 2055, 60% weighted response rate) on use of prayer. Data were(More)
We explored age-specific and gender-specific effects of fluoride level in drinking water and the incidence of osteosarcoma. We used data from a matched case–control study conducted through 11 hospitals in the United States that included a complete residential history for each patient and type of drinking water (public, private well, bottled) used at each(More)
BACKGROUND Contrast-enhanced cardiac magnetic resonance imaging (CMR) can determine the extent of myocardial scar from infarction (MI). However, the prognostic significance of unrecognized myocardial scar by CMR in patients without a history of MI is unknown. METHODS AND RESULTS One hundred ninety-five patients without a known prior MI underwent CMR for(More)
Previous studies have suggested that patients with chronic medical conditions use complementary and alternative medicine (CAM) at a higher rate than the general population. Despite recent interest in CAM for cardiovascular disease, few data are available regarding patterns of use in patients with cardiovascular disease in the United States. This study used(More)
This paper concerns a recursive partitioning algorithm for incomplete survival data. The splitting criterion employed is exponential log-likelihood loss. The method has been integrated into a computer program similar in structure to the commercial package CART. Special features incorporated into the program include a modification to prevent zero hazard(More)