Search results for: Kerrie P. Nelson

Items from 1 to 20 out of 23 results

article

Disparities in use of physical restraints at an urban, minority‐serving hospital emergency department

Elizabeth C. Pino, Felisha Gonzalez, Kerrie P. Nelson, Sorraya Jaiprasert, more

Academic Emergency Medicine > 31 > 1 > 6 - 17

Background Recent reports have identified associations between patient race and ethnicity and use of physical restraint while receiving care in the emergency department (ED). However, no study has assessed this relationship in hospitals primarily treating patients of color and underserved populations. The primary objective of this study was to evaluate the association between race/ethnicity and the...

article

Calculating power for the Finkelstein and Schoenfeld test statistic for a composite endpoint with two components

Thomas J. Zhou, Michael P. LaValley, Kerrie P. Nelson, Howard J. Cabral, more

Statistics in Medicine > 41 > 17 > 3321 - 3335

The Finkelstein and Schoenfeld (FS) test is a popular generalized pairwise comparison approach to analyze prioritized composite endpoints (eg, components are assessed in order of clinical importance). Power and sample size estimation for the FS test, however, are generally done via simulation studies. This simulation approach can be extremely computationally burdensome, compounded by increasing number...

article

Patient navigation to address sociolegal barriers for patients with cancer: A comparative‐effectiveness study

Tracy A. Battaglia, Christine M. Gunn, Sharon M. Bak, JoHanna Flacks, more

Cancer > 128 > S13 > 2623 - 2635

Background Sociolegal barriers to cancer care are defined as health‐related social needs like affordable healthy housing, stable utility service, and food security that may be remedied by public policy, law, regulation, or programming. Legal support has not been studied in cancer care. Methods The authors conducted a randomized controlled trial of patients who had newly diagnosed cancer at a safety‐net...

article

Measuring rater bias in diagnostic tests with ordinal ratings

Chanmin Kim, Xiaoyan Lin, Kerrie P. Nelson

Statistics in Medicine > 40 > 17 > 4014 - 4033

Diagnostic tests are frequently reliant upon the interpretation of images by skilled raters. In many clinical settings, however, the variability observed between experts' ratings plays a detrimental role in the degree of confidence in these interpretations, leading to uncertainty in the diagnostic process. For example, in breast cancer testing, radiologists interpret mammographic images, while breast...

article

Loop Drainage Is Noninferior to Traditional Incision and Drainage of Cutaneous Abscesses in the Emergency Department

Elissa M. Schechter‐Perkins, Kristin H. Dwyer, Anish Amin, Matthew D. Tyler, more

Academic Emergency Medicine > 27 > 11 > 1150 - 1157

Background There is limited research on loop drainage (LD) compared to incision and drainage (I&D) for treatment of cutaneous abscesses. We investigated whether LD was noninferior to I&D for abscess resolution and whether there was any difference in repeat ED visits or complication rates between these techniques. Methods We performed a prospective randomized controlled trial, using a convenience...

article

Measuring intrarater association between correlated ordinal ratings

Kerrie P. Nelson, Thomas J. Zhou, Don Edwards

Biometrical Journal > 62 > 7 > 1687 - 1701

Variability between raters' ordinal scores is commonly observed in imaging tests, leading to uncertainty in the diagnostic process. In breast cancer screening, a radiologist visually interprets mammograms and MRIs, while skin diseases, Alzheimer's disease, and psychiatric conditions are graded based on clinical judgment. Consequently, studies are often conducted in clinical settings to investigate...

article

Measuring Agreement Among Prehospital Providers and Physicians in Patient Capacity Determination

Laurel O'Connor, Liam Porter, Julianne Dugas, Conor Robinson, more

Academic Emergency Medicine > 27 > 7 > 580 - 587

Objectives If a patient wishes to refuse treatment in the prehospital setting, prehospital providers and consulting emergency physicians must establish that the patient possesses the capacity to do so. The objective of this study is to assess agreement among prehospital providers and emergency physicians in performing patient capacity assessments. Methods This study involved 139 prehospital providers...

article

Marginal analysis of ordinal clustered longitudinal data with informative cluster size

Aya A. Mitani, Elizabeth K. Kaye, Kerrie P. Nelson

Biometrics > 75 > 3 > 938 - 949

The issue of informative cluster size (ICS) often arises in the analysis of dental data. ICS describes a situation where the outcome of interest is related to cluster size. Much of the work on modeling marginal inference in longitudinal studies with potential ICS has focused on continuous outcomes. However, periodontal disease outcomes, including clinical attachment loss, are often assessed using...

article

A paired kappa to compare binary ratings across two medical tests

Kerrie P. Nelson, Don Edwards

Statistics in Medicine > 38 > 17 > 3272 - 3287

Agreement between experts' ratings is an important prerequisite for an effective screening procedure. In clinical settings, large‐scale studies are often conducted to compare the agreement of experts' ratings between new and existing medical tests, for example, digital versus film mammography. Challenges arise in these studies where many experts rate the same sample of patients undergoing two medical...

article

In reply:

Judith A. Linden, James A. Feldman, Kerrie P. Nelson

Annals of Emergency Medicine > 2018 > 72 > 2 > 224-225

article

Is hallway care dangerous? An observational study

Jeffrey A. Rixe, James H. Liu, Hudson A. Breaud, Kerrie P. Nelson, more

The American Journal of Emergency Medicine > 2018 > 36 > 8 > 1451-1454

In response to crowding the use of hallway beds has become an increasingly prevalent practice in Emergency Departments (EDs). There is limited research on whether caring for patients in hallways (HP) is associated with adverse outcomes. The goal of this study was to examine the effects of HP triage on 30 day outcomes for ED return, readmission, and mortality.We performed a retrospective cohort study...

article

Evaluating the effects of rater and subject factors on measures of association

Kerrie P. Nelson, Aya A. Mitani, Don Edwards

Biometrical Journal > 60 > 3 > 639 - 656

Large‐scale agreement studies are becoming increasingly common in medical settings to gain better insight into discrepancies often observed between experts' classifications. Ordered categorical scales are routinely used to classify subjects' disease and health conditions. Summary measures such as Cohen's weighted kappa are popular approaches for reporting levels of association for pairs of raters'...

article

Modeling rater diagnostic skills in binary classification processes

Xiaoyan Lin, Hua Chen, Don Edwards, Kerrie P. Nelson

Statistics in Medicine > 37 > 4 > 557 - 571

Many disease diagnoses involve subjective judgments by qualified raters. For example, through the inspection of a mammogram, MRI, or ultrasound image, the clinician himself becomes part of the measuring instrument. To reduce diagnostic errors and improve the quality of diagnoses, it is necessary to assess raters' diagnostic skills and to improve their skills over time. This paper focuses on a subjective...

article

Is the Pelvic Examination Still Crucial in Patients Presenting to the Emergency Department With Vaginal Bleeding or Abdominal Pain When an Intrauterine Pregnancy Is Identified on Ultrasonography? A Randomized Controlled Trial

Judith A. Linden, Benjamin Grimmnitz, Laura Hagopian, Alan H. Breaud, more

Annals of Emergency Medicine > 2017 > 70 > 6 > 825-834

We determine whether omitting the pelvic examination in emergency department (ED) evaluation of vaginal bleeding or lower abdominal pain in ultrasonographically confirmed early intrauterine pregnancy is equivalent to performing the examination.We conducted a prospective, open-label, randomized, equivalence trial in pregnant patients presenting to the ED from February 2011 to November 2015. Patients...

article

Summary measures of agreement and association between many raters' ordinal classifications

Aya A. Mitani, Phoebe E. Freer, Kerrie P. Nelson

Annals of Epidemiology > 2017 > 27 > 10 > 677-685.e4

Interpretation of screening tests such as mammograms usually require a radiologist's subjective visual assessment of images, often resulting in substantial discrepancies between radiologists' classifications of subjects' test results. In clinical screening studies to assess the strength of agreement between experts, multiple raters are often recruited to assess subjects' test results using an ordinal...

article

Assessing the influence of rater and subject characteristics on measures of agreement for ordinal ratings

Kerrie P. Nelson, Aya A. Mitani, Don Edwards

Statistics in Medicine > 36 > 20 > 3181 - 3199

Widespread inconsistencies are commonly observed between physicians' ordinal classifications in screening tests results such as mammography. These discrepancies have motivated large‐scale agreement studies where many raters contribute ratings. The primary goal of these studies is to identify factors related to physicians and patients' test results, which may lead to stronger consistency between raters'...

article

A critical analysis of unplanned ICU transfer within 48 hours from ED admission as a quality measure

Cassidy M. Dahn, A. Travis Manasco, Alan H. Breaud, Samuel Kim, more

The American Journal of Emergency Medicine > 2016 > 34 > 8 > 1505-1510

Unplanned intensive care unit (ICU) transfer (UIT) within 48 hours of emergency department (ED) admission increases morbidity and mortality. We hypothesized that a majority of UITs do not have critical interventions (CrIs) and that CrI is associated with worse outcomes.The objective of the study is to characterize all UITs (including patients who died before ICU transfer), the proportion with CrI,...

article

Measures of agreement between many raters for ordinal classifications

Kerrie P. Nelson, Don Edwards

Statistics in Medicine > 34 > 23 > 3116 - 3132

Screening and diagnostic procedures often require a physician's subjective interpretation of a patient's test result using an ordered categorical scale to define the patient's disease severity. Because of wide variability observed between physicians' ratings, many large‐scale studies have been conducted to quantify agreement between multiple experts' ordinal classifications in common diagnostic procedures...

article

Consuming a hypocaloric high fat low carbohydrate diet for 12weeks lowers C-reactive protein, and raises serum adiponectin and high density lipoprotein-cholesterol in obese subjects

Megan R. Ruth, Ava M. Port, Mitali Shah, Ashley C. Bourland, more

Metabolism > 2013 > 62 > 12 > 1779-1787

High fat, low carbohydrate (HFLC) diets have become popular tools for weight management. We sought to determine the effects of a HFLC diet compared to a low fat high carbohydrate (LFHC) diet on the change in weight loss, cardiovascular risk factors and inflammation in subjects with obesity.Obese subjects (29.0–44.6kg/m ² ) recruited from Boston Medical Center were randomized to a hypocaloric...

article

Editor's Capsule Summary

Scott G. Weiner, Christopher A. Griggs, Patricia M. Mitchell, Breanne K. Langlois, more

Annals of Emergency Medicine > 2013 > 62 > 4 > 281-289

We compare emergency provider impression of drug-seeking behavior with objective criteria from a state prescription drug monitoring program, assess change in opioid pain reliever prescribing after prescription drug monitoring program review, and examine clinical factors associated with suspected drug-seeking behavior. This was a prospective observational study of emergency providers assessing a...

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INFONA - science communication portal

Search results for: Kerrie P. Nelson

Disparities in use of physical restraints at an urban, minority‐serving hospital emergency department

Calculating power for the Finkelstein and Schoenfeld test statistic for a composite endpoint with two components

Patient navigation to address sociolegal barriers for patients with cancer: A comparative‐effectiveness study

Measuring rater bias in diagnostic tests with ordinal ratings

Loop Drainage Is Noninferior to Traditional Incision and Drainage of Cutaneous Abscesses in the Emergency Department

Measuring intrarater association between correlated ordinal ratings

Measuring Agreement Among Prehospital Providers and Physicians in Patient Capacity Determination

Marginal analysis of ordinal clustered longitudinal data with informative cluster size

A paired kappa to compare binary ratings across two medical tests

In reply:

Is hallway care dangerous? An observational study

Evaluating the effects of rater and subject factors on measures of association

Modeling rater diagnostic skills in binary classification processes

Is the Pelvic Examination Still Crucial in Patients Presenting to the Emergency Department With Vaginal Bleeding or Abdominal Pain When an Intrauterine Pregnancy Is Identified on Ultrasonography? A Randomized Controlled Trial

Summary measures of agreement and association between many raters' ordinal classifications

Assessing the influence of rater and subject characteristics on measures of agreement for ordinal ratings

A critical analysis of unplanned ICU transfer within 48 hours from ED admission as a quality measure

Measures of agreement between many raters for ordinal classifications

Consuming a hypocaloric high fat low carbohydrate diet for 12weeks lowers C-reactive protein, and raises serum adiponectin and high density lipoprotein-cholesterol in obese subjects

Editor's Capsule Summary

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