Potentially inappropriate medication prescribing in outpatient practices: Prevalence and patient characteristics based on electronic health records

Background: Some older adults receive potentially inappropriate medications (PIMs), increasing their risk for adverse events. A literature search did not find any US multicenter studies that measured the prevalence of PIMs in outpatient practices based on data from electronic health records (EHRs), using both the Beers and Zhan criteria.Objectives: The aims of the present study were to compare the prevalence of PIMs using standard drug terminologies at 2 disparate institutions using EHRs and to identify characteristics of elderly patients who have a PIM on their active-medication lists.Methods: This cross-sectional study of outpatients' active-medication lists from April 1, 2006, was conducted using data from 2 outpatient primary care settings: Intermountain Healthcare, Salt Lake City, Utah (center 1), and the Cleveland Clinic, Cleveland, Ohio (center 2). Data were included from patients who were aged ≥65 years at the time of the last office visit and had ≥2 documented clinic visits within the previous 2 years. The primary end point was prevalence of PIMs, measured according to the 2002 Beers criteria or the 2001 Zhan criteria.Results: Data from 61,251 patients were included (36,663 women, 24,588 men; center 1: 37,247 patients; center 2: 24,004). A total of 8693 (23.3%) and 5528 (23.0%) patients at centers 1 and 2, respectively, were documented as receiving a PIM as per the Beers criteria; this difference was not statistically significant. Per the Zhan criteria (P < 0.001), these values were 6036 (16.2%) and 4160 (17.3%). Eight of the most common PIMs were the same at both institutions, with propoxyphene and fluoxetine (once daily) being the most prescribed. Female sex, polypharmacy (≥6 medications), and multiple primary care visits were significantly associated with PIM prescribing.Conclusions: In this analysis of data from elderly patients at 2 outpatient centers, a small set of 8 medications accounted for the majority of PIMs at both centers, irrespective of geographic and demographic variations. Female sex, polypharmacy, and number of primary care visits were significantly associated with PIM prescribing. In this analysis of data from elderly patients at 2 outpatient centers, a small set of 8 medications accounted for the majority of PIMs at both centers, irrespective of geographic and demographic variations.     

Potentially Inappropriate Medication Utilization in the Emergency Department Visits by Older Adults: Analysis From a Nationally Representative Sample

Objectives: The objectives were to determine the frequency of administration of potentially inappropriate medications (PIMs) to older emergency department (ED) patients and to examine recent trends in the rates of PIM usage. Methods: The data examined during the study were obtained from the National Hospital Ambulatory Medical Care Survey (NHAMCS). This study utilized the nationally representative ED data from 2000–2006 NHAMCS surveys. Our sample included older adults (age 65 years and greater) who were treated in the ED and discharged home. Estimated frequencies of PIM‐associated ED visits were calculated. A multivariable logistic regression model was created to assess demographic, clinical, and hospital factors associated with PIM administration and to assess temporal trends. Results: Approximately 19.5 million patients, or 16.8% (95% confidence interval [CI] = 16.1% to 17.4%) of eligible ED visits, were associated with one or more PIMs. The five most common PIMs were promethazine, ketorolac, propoxyphene, meperidine, and diphenhydramine. The total number of medications prescribed or administered during the ED visit was most strongly associated with PIM use. Other covariates associated with PIM use included rural location outside of the Northeast, being seen by a staff physician only (and not by a resident or intern), presenting with an injury, and the combination of female sex and age 65–74 years. There was a small but significant decrease in the proportion of visits associated with a PIM over the study period. Conclusions: Potentially inappropriate medication administration in the ED remains common. Given rising concerns about preventable complications of medical care, this area may be of high priority for intervention. Substantial regional and hospital type (teaching versus nonteaching) variability appears to exist. ACADEMIC EMERGENCY MEDICINE 2010; 17:231–237 © 2010 by the Society for Academic Emergency Medicine     

Potentially inappropriate medication use in elderly Japanese patients

Background: Modified Beers criteria for elderly Japanese patients were developed in 2008 by consensus among 9 experts to reflect regional clinical practice and available medications in Japan. Since then, many physicians and pharmacists have expressed interest in obtaining more information about the criteria and alternative drug choices.Objective: This study examined the incidence, health care utilization, and costs associated with potentially inappropriate medications (PIMs) in elderly patients based on the modified Beers criteria.Methods: A retrospective, observational cohort study was conducted using health insurance claims data in Japan. The study population included elderly patients aged ≥65 years who had at least 2 pharmacy claims in separate months over a 1-year period (April 2006 through March 2007). Use of the PIMs was identified using the modified criteria, and 1-year incidence rates were calculated for the total study population and for subgroups stratified by age and sex. A logistic regression model was used to examine demographic and clinical characteristics associated with PIMs. Health care utilization rates and costs were also analyzed and compared between patients with and without PIMs using generalized linear models. All models included dummy variables indicating age category, female sex, hospitalization, polypharmacy, index month, and number of Elixhauser comorbidities to adjust for potential confounders.Results: Among 6628 elderly patients, 71.2% (4721/6628) were female and 62.9% (4167/6628) were aged 65 to 74 years; 43.6% (2889/6628) were prescribed at least one PIM. The most commonly used PIMs were histamine-2 blockers (20.5% [1356/6628]), benzodiazepines (11.4% [756/6628]), and anticholinergics and antihistamines (7.9% [526/6628]). No significant differences in incidence rates were observed based on age or sex. Inpatient service use, polypharmacy, and comorbidities of peptic ulcer, depression, and cardiac arrhythmias were significant predictors of PIM use while controlling for other factors. PIM users had significantly higher hospitalization risk (1.68-fold), more outpatient visit days (1.18-fold), and higher medical costs (33% increase) than did nonusers.Conclusions: In a group of elderly Japanese patients, 43.6% used at least one PIM over a 1-year period in this study. PIM use was associated with greater health care utilization rates and costs.     

Antipsychotic use at adult ambulatory care visits by patients with mental health disorders in the United States, 1996-2003: national estimates and associated factors

OBJECTIVES: This retrospective analysis was conducted to derive national estimates of typical, atypical, and combination (typical-atypical) antipsychotic use and to examine factors associated with their use at adult (age >-18 years) ambulatory care visits by patients with mental health disorders in the United States. METHODS: Data on adult visits with an International Classification of Diseases, Ninth Revision, Clinical Modification diagnosis code for a mental health disorder were extracted from the office-based National Ambulatory Medical Care Survey and the outpatient facilitybased National Hospital Ambulatory Medical Care Survey from 1996 through 2003. The visits were categorized according to whether use of a typical, atypical, or combination antipsychotic was mentioned (either prescribed, supplied, administered, ordered, or continued at the visits). Total weighted visit estimates, weighted visit percentages, and 95% CIs were calculated across the 3 types of visit groups. Bivariate analysis was performed on the association between selected characteristics and the 3 visit groups. Multivariate logistic regression was performed on factors associated with atypical versus typical antipsychotic use. RESULTS: During the 8-year period, there were an estimated 47.7 million adult ambulatory care visits involving a mental health disorder and mention of an antipsychotic (weighted percent: 0.83%; 95% CI, 0.73-0.93). From 1996/1997 to 2002/2003, visits involving atypical and combination antipsychotics increased by 195% and 149%, respectively, and visits involving typical antipsychotics decreased by 71%. Men, blacks, and those with public insurance made more visits in which combination antipsychotics rather than typical or atypical antipsychotics were mentioned. Relative to typical or combination antipsychotic visits, more atypical antipsychotic visits involved antide-pressants (weighted percent: 61.23% atypical, 37.29% typical, and 38.32% combination). Fewer atypical antipsychotic visits compared with typical or combination antipsychotic visits involved psychotic disorders (weighted percent: 32.94%, 51.23%, and 69.93%, respectively) and medications for extrapyramidal symptoms (weighted percent: 6.69%, 29.95%, and 36.64%). In multivariate analyses controlling for sex, race, diagnosis of schizophrenia, region, diagnosis of anxiety, and recent years, atypical versus typical antipsychotic use was significantly less likely at visits by those aged 41 to 64 years compared with those aged 18 to 40 years (adjusted odds ratio [OR] = 0.63; 95% CI, 0.47-0.84; P = 0.002); significantly less likely at visits by those with public compared with private insurance (Medicare OR = 0.59 [95% CI, 0.40-0.88], P = 0.010; Medicaid OR = 0.44 [95% CI, 0.28-0.69], P < 0.001); and significantly more likely at visits associated with depression compared with those not associated with depression (OR = 1.92; 95% CI, 1.26-2.93; P = 0.003) and those associated with bipolar disorder compared with those not associated with bipolar disorder (OR = 2.10; 95% CI, 1.32-3.36; P = 0.002). CONCLUSIONS: This retrospective analysis found more atypical than typical or combination antipsychotic use at US ambulatory care visits by adults with mental health disorders other than schizophrenia or psychoses in the period studied. Atypical versus typical antipsychotic use was significantly less likely at visits by adults aged 41 to 64 years and those with public insurance, but significantly more likely at visits by those with depression or bipolar disorder.     

Subtypes of potentially inappropriate medications in older Chinese-Americans during care transitions: Cross sectional retrospective study

Background

The number of Chinese Americans is growing and nearly 20% of older Chinese-American home care patients have at least one potentially inappropriate medications (PIMs) prescribed at hospital discharge. Further examination of PIMs during care transition is warranted, especially among older Chinese-Americans.

Objectives

To describe, during care transitions from hospital to home care: (i) the subtypes of PIMs, (ii) the difference of PIM prevalence prescribed at hospital discharge as compared to home care admission, (iii) the relationship between subtypes of PIMs, and (iv) issues affecting medication reconciliation among older Chinese-Americans.

Methods

This cross-sectional, retrospective study was conducted in a large urban home care agency from June 2010 to July 2011. From data collected by in-home survey and chart abstraction, PIMs were identified using 2002 diagnosis-independent Beers criteria. The difference of PIM prevalence at hospital discharge and at home care admission was analyzed by Wilcoxon Signed Ranks test. The relationship between subtypes of PIMs was evaluated using Phi coefficient.

Participants

82 older (age 65 years and above) Chinese-American home care patients following recent hospital discharge.

Results

3.38% (22) and another 3.72% (28) of prescribed medications were identified as PIMs at hospital discharge and home care admission, respectively. There was no statistically significant difference in PIM prevalence identified at hospital discharge and at homecare admission (z = −1.732, p = .083). PIMs included: long-term use of stimulant laxatives and high-dosages of ferrous sulfate, and a significant relationship between these two PIMS (r = .224, p = .04). More than 80% (n = 65) of study participants reported low education levels and limited English proficiency.

Conclusions

Subtypes of PIMs were ordered during the post-hospital transfers, indicating the necessity to review the appropriateness of medications during this transition. Guidelines such as Beer's criteria regarding appropriateness of medications should be incorporated in medication reconciliation before adding new medications to treat the older adult's health problems. The medication management process needs to be both culturally sensitive and adapted to literacy level; validating the patients’ full understanding of their medications is paramount.     

Medication Discrepancy and Potentially Inappropriate Medication in Older Chinese-American Home-Care Patients After Hospital Discharge

BackgroundStudies of potential medication problems among older adults have focused on English-speaking populations in a single health care setting or a single potential medication problem. No previous studies investigated potential inappropriate medications (PIMs) and medication discrepancies (MDs) among older Chinese Americans during care transitions from hospital discharge to home care.ObjectiveThe aims of this study were to examine, in older Chinese Americans, the prevalence of both PIMs and MDs; the relationship between PIMs and MDs; and the patient and hospitalization characteristics associated with them during care transitions from hospital discharge to home care.MethodsThis cross-sectional study was conducted with a sample of older Chinese Americans from a large certified nonprofit home-care agency in New York City from June 2010 to July 2011. PIMs were identified by using 2002 diagnosis-independent Beers criteria. MDs were identified by comparing the differences between hospital discharge medication order and home-care admission medication order. Prevalence of PIMs and MDs and their relationship was determined. Logistic regression examined the relationship between hospitalization and patient characteristics with PIMs and MDs.ResultsThe sample consisted of 82 older Chinese-American home-care patients. Twenty (24.3%) study participants were prescribed at least one PIM at hospital discharge. Fifty-one (67.1%) study participants experienced at least one MD. A positive correlation was found between the occurrence of PIMs and MDs (r = 0.22; P = 0.05). Number of medications was the only significant factor associated with both PIMs and MDs. In addition, older age and more hospitalization days were associated with PIMs.ConclusionsThe evident prevalence of PIMs and MDs supports the practice of evaluating the appropriateness of medications while reconciling inconsistencies in medication regimens. The number of medications was the only factor associated with both PIMs and MDs, underscoring the need to address polypharmacy as a multifaceted threat to patient health.     

Potential adverse drug events in an indigent and homeless geriatric population.

OBJECTIVE: To identify potential adverse drug events (ADEs) in a geriatric ambulatory population using the modified Beers criteria. METHODS: This is a cross-sectional study of an indigent and homeless geriatric population served by a network of six primary healthcare clinics with clinical pharmacy services. Medical records of patients > or = 65 years old visiting the clinics between December 1999 and April 2000 were retrospectively reviewed by a clinical pharmacist. Medications meeting the modfied Beers criteria were evaluated for the most common drug classes involved, severity potential, and dose or disease state restrictions. Following the identification of medications meeting Beers criteria, the pharmacist left a written recommendation regarding use of alternative drugs or doses in the medical record. Physician acceptance of pharmacy recommendations was also evaluated. RESULTS: Medical records of 146 patients (71.9% women, average age 72.6 +/- 6.7 y) were reviewed. Overall, 52 patients (35.6%) had 70 medications with the potential for causing an ADE based on the modified Beers criteria The most commonly identified medication classes were narcotic analgesics (20.0%), antihypertensives (20.0%), and antihistamines (14.3%). Fifteen of these medications (21.4%) had a high severity potential. Identified medications met the following modified Beers criteria: 41.4% were inappropriate in a specific disease state, 38.6% were inappropriate for the elderly, 10.0% exceeded maximum dosage guidelines, and 10.0% were inappropriate for both the elerly and the patients disease state. Approximately 60% of pharmacy recommendations were accepted by physicians. CONCLUSIONS: The modified Beers criteria are a useful tool for reviewing medical records to identify potential ADEs in an ambulatory geriatric population.     

Trends in off-label beta-blocker use: a secondary data analysis

BACKGROUND: The off-label use of beta-blockers might be prevalent, but no studies have provided empiric data on the off-label use based on utilization data. OBJECTIVE: This secondary data analysis was conducted to describe the trends of off-label use of beta-blockers among ambulatory visits made to office-based physicians in the United States. METHODS: Data from the National Ambulatory Medical Care Surveys from 1999 to 2002 were used in this study. Physician visits at which beta-blockers were prescribed (beta-blocker visits) were included and classified as within-label or off-label visits according to whether an approved indication for the beta-blocker was coded for the visits. Variables of patient demographic characteristics, diagnosis, prescriber's specialty, and concomitant medication use were also analyzed. Logistic regression analysis was employed to investigate the potential determinants for the off-label use of beta-blockers. RESULTS: A total of 3349 million visits were made to office-based physicians during the study period. About 65% (2167 million) of all visits were prescribed with > or =1 medication (medication visits). Beta-blockers were prescribed in 5.9% (127.3 million) of all medication visits in the years 1999 to 2002. The 3 most frequently prescribed beta-blockers in this study were atenolol, metoprolol, and propranolol. The proportions of off-label use among beta-blocker visits were 44.3% (1999), 56.3% (2000), 62.3% (2001), and 46.9% (2002); overall, 52.0% (66.2 million). About 11% (75.7 million) of these off-label uses were prescribed to patients with concomitant conditions that required judicious use of beta-blockers. Specialists, such as cardiologists, were more likely to prescribe beta-blockers for off-label use than primary care physicians (odds ratio, 2.147; 95% CI, 2.1464-2.1473). CONCLUSIONS: Our study found that the off-label use rate of beta-blockers was higher than what has been previously reported for other diseases and medications. Compared with visits made to general practitioners, visits made to specialists were more likely to be prescribed off-label use of beta-blockers. Future studies are needed to understand the legal, economic, and clinical impact of off-label use.     

Patient characteristics and patterns of drug use for sleep complaints in the United States: analysis of National Ambulatory Medical Survey data, 1997-2002

OBJECTIVE: The aims of this work were to characterize ambulatory patients in the United States presenting with primary or secondary insomnia complaints and resultant diagnoses, and to describe the characteristics of patients treated with medications commonly used for sleep complaints. METHODS: Data from the National Ambulatory Medical Care Survey for the years 1997 through 2002 were analyzed. Data were stratified by patient characteristics, physician specialty, resulting diagnosis, and medications prescribed or provided. The unit of analysis was the individual patient visit; statistical comparisons were made using the chi(2) test for categorical variables and the Rao-Scott design-adjusted chi(2) test for comparisons of patient age groups. P<0.05 was the criterion for statistical significance. Cells containing < 30 observations were not included in the statistical analysis. RESULTS: The data included 147,945 patient visit records; rates of physician response to the survey ranged from 62.9% in 1999 to 70.4% in 2002. Based on this sample, it was projected that 30 million office visits involved insomnia complaints over the 6-year period from 1997 to 2002 throughout the United States. With a total of 4.9 billion physician visits projected for that time period, 0.6% of visits were insomnia related. Women were 1.5 times more likely to have insomnia-related visits (P<0.001). Overall, the greatest proportion of insomnia patients of both sexes was between the ages of 18 and 64 years (P<0.001). Sleep difficulties were most frequently attributed to organic disorders, depression and/or anxiety, and primary insomnia (55.8%, 27.3%, and 9.8%, respectively; P<0.001). The most frequently prescribed or recommended medications were zaleplon/zolpidem and trazodone (28.5% and 32.0%, respectively; P<0.001). Zaleplon and zolpidem were most frequently used for patients with organic diagnoses and those aged < or =65 years (33.2% and 29.8%; P<0.001). CONCLUSIONS: Demographics of patients with insomnia and their diagnoses from 1999 to 2002 remained stable, but the use of medications changed predictably as newer agents became available.     

北京市社区老年人潜在不适当用药的调查分析

目的 调查北京市社区老年人潜在不适当用药(potentially inappropriate medication,PIM)现状.方法 采用自我报告方式,收集北京市社区215名老年人用药信息,根据2019版美国老年人PIM标准(Beers criteria for PIM use in older adults,Beers标准)和中国老年人潜在不适当用药判断标准(中国PIM标准)评价并做描述性分析.结果 根据2019版Beers标准发现66人(30.7%)存在84例次PIM,其中中枢神经系统药物(36例次)、血液系统药物(14例次)、内分泌系统药物(11例次)导致的PIM最多;采用中国PIM标准发现53人(24.7%)存在73例次PIM,前三位分别为:中枢神经系统药物(31例次),血液系统药物(17例次),解热、镇痛、抗炎与抗风湿药(17例次).结论 社区老年人PIM发生率较高,特别是中枢神经系统和血液系统用药需要引起关注.Beers标准和中国PIM标准可相互补充,且需不断更新完善.     

Impact of national low back pain guidelines on clinical practice

OBJECTIVES: The purpose of this study was to assess the impact of the 1994 Agency for Health Research and Quality (AHRQ) clinical practice guidelines on the management of acute low back pain. METHODS: From the National Ambulatory Medical Care Service database, the authors abstracted data on patients being seen in primary care settings, presenting with low back pain as their primary reason for visit, and aged between 20 and 55 years. Patients with an inflammatory or secondary diagnosis to explain their back pain were excluded. Using the sampling weights assigned by the National Ambulatory Medical Care Service, we assessed the medications prescribed, referrals for physiotherapy, and radiography usage for 3 years before (1991 to 1993) and after (1995 to 1997) release of the back pain guidelines. RESULTS: During these 6 years, more than 10 million ambulatory office visits were available for analysis, 5.2 million visits between 1991 to 1993 and 5.0 million visits between 1995 to 1997. The most common diagnosis was lumbago, present in 21% of these visits. Acetaminophen use increased 20-fold from 0.1 to 2%, nonsteroidal use increased from 40 to 43%, muscle relaxant use decreased from 29 to 20%, radiography ordering increased slightly from 15.4 to 19.4%, and physical therapy referrals declined from 27 to 22%. There was no evidence of a trend toward increased compliance with the AHRQ guidelines over time. CONCLUSIONS: The AHRQ clinical practice guidelines for the management of acute low back pain had a modest impact on physician behavior, increasing the use of acetaminophen and nonsteroidals and decreasing the use of muscle relaxants and physical therapy referrals.     

ED visits by older adults for ambulatory care-sensitive and supply-sensitive conditions

OBJECTIVES: The aim of this study was to examine the effect of advanced age on ED outcomes, including hospitalization for any reason, ambulatory care-sensitive hospitalizations (ACSHs), and supply-sensitive hospitalizations. METHODS: A secondary data analysis of the National Hospital Ambulatory Care Survey was conducted. National estimates of patient visits were obtained using available sampling weights from National Hospital Ambulatory Care Survey, and population estimates were calculated using estimates published by the US Census Bureau. RESULTS: Older adults made 48 million patient visits to ED between 2000 and 2002. Overall, 20.3% was for an ambulatory care-sensitive condition, yielding 5 million ACSH, whereas 62% was for a supply-sensitive condition, yielding 9.5 million supply-sensitive hospitalizations. Residents from nursing homes and patients aged 85 years or older were more likely to be hospitalized for any reason, for ACSH, and for supply-sensitive conditions. CONCLUSIONS: Further research is needed to understand how comorbidity contributes to increasing ED and hospital use among older adults.