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The “CHROME criteria”: Tool to optimize and audit prescription quality of psychotropic medications in institutionalized people with dementia

Published online by Cambridge University Press:  22 October 2019

Ruben Muñiz
Affiliation:
Maria Wolff Foundation, Madrid, Spain
Alia I. Pérez-Wehbe
Affiliation:
Universidad de la Laguna, Sta Cruz de Tenerife, Spain
Francisco Couto
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
María Pérez
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
Noemí Ramírez
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
Alejandro López
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
Javier Rodríguez
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
Teresa Usieto
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
Lietzan Lavin
Affiliation:
Centro Sociosanitario El Pino, Instituto de Atención Social y Sociosanitaria (IAS), Las Palmas de Gran Canaria, Spain
Ana Rigueira
Affiliation:
Servicio de Farmacia, Hospital Universitario San Agustín, Avilés, Spain
Luis Agüera-Ortiz
Affiliation:
Servicio de Psiquiatría, Hospital Universitario 12 de Octubre, Madrid, Spain
Jorge López-Alvarez
Affiliation:
Servicio de Psiquiatría, Hospital Universitario 12 de Octubre, Madrid, Spain
Manuel Martín-Carrasco
Affiliation:
Clínica Padre Menni, Hermanas Hospitalarias, Pamplona, Spain
Javier Olazarán*
Affiliation:
Maria Wolff Foundation, Madrid, Spain Servicio de Neurología, Hospital General Universitario Gregorio Marañón, Madrid, Spain
*
Correspondence should be addressed to: Javier Olazarán, MD, PhD, Fundación Maria Wolff, Río Sil 15 bis, 28660 Boadilla del Monte, Madrid, Spain. Phone: +34 916322507; Fax +34 914336033. Email: javier@mariawolff.es.
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Abstract

Objective:

Describe and validate the CHROME (CHemical Restraints avOidance MEthodology) criteria.

Design:

Observational prospective longitudinal study.

Setting:

Single nursing home in Las Palmas de Gran Canaria, Spain.

Participants:

288 residents; mean age: 81.6 (SD 10.6). 77.4% had dementia.

Intervention:

Multicomponent training and consultancy program to eliminate physical and chemical restraints and promote overall quality care. Clinicians were trained in stringent diagnostic criteria of neuropsychiatric syndromes and adequate psychotropic prescription.

Measurements:

Psychotropic prescription (primary study target), neuropsychiatric syndromes, physical restraints, falls, and emergency room visits were semi-annually collected from December 2015 to December 2017. Results are presented for all residents and for those who had dementia and participated in the five study waves (completer analysis, n=107).

Results:

For the study completers, atypical neuroleptic prescription dropped from 42.7% to 18.7%, long half-life benzodiazepines dropped from 25.2% to 6.5%, and hypnotic medications from 47.7% to 12.1% (p<0.0005). Any kind of fall evolved from 67.3 to 32.7 (number of falls by 100 residents per year). Physicians’ diagnostic confidence increased, while the frequency of diagnoses of neuropsychiatric syndromes decreased (p<0.0005).

Conclusions:

Implementing the CHROME criteria reduced the prescription of the most dangerous medications in institutionalized people with dementia. Two independent audits found no physical or chemical restraint and confirmed prescription quality of psychotropic drugs. Adequate diagnosis and independent audits appear to be the keys to help and motivate professionals to optimize and reduce the use of psychotropic medication. The CHROME criteria unify, in a single compendium, neuropsychiatric diagnostic criteria, prescription guidelines, independent audit methodology, and minimum legal standards. These criteria can be easily adapted to other countries.

Type
Original Research Article
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited
Copyright
© International Psychogeriatric Association 2019

Introduction

Despite their modest efficacy and the significant risks derived from their use, psychotropic medications are widely utilized among elderly adults with cognitive impairment, often in a nonspecific way (Majic et al., Reference Majic2010). Neuroleptics and long half-life benzodiazepines are the most deleterious drugs associated with faster cognitive decline, higher rate of cerebrovascular events and falls, and unexpected high mortality (Ballard et al., Reference Ballard2009; Olazarán et al., Reference Olazarán, Valle, Serra, Cano and Muñiz2013; Schneider et al., Reference Schneider, Dagerman and Insel2005). The term chemical restraint has been created to designate the inappropriate prescription of drugs that have the ability to limit personal freedom.

Namely, the Centers for Medicare & Medicaid Services (CMS) and the federal law of the United States defined chemical restraint as “any drug used for discipline or convenience and not required to treat medical symptoms.” The CMS defines “convenience” (Interpretive Guidelines §483.13(a))as any action taken by the facility to control a resident’s behavior with a lesser amount of effort by the facility and not in the resident’s best interest. “Medical symptom” is defined as an indication or characteristic of a physical or psychological condition.

Although these definitions and interpretations help identify extreme cases of malpractice, less obvious cases of pharmacological restraining or suboptimal prescription quality might pass undetected as concepts like “resident’s best interest” or “physical or psychological condition” are vague and prone to biased interpretation. This is possibly one of the reasons why there is little research on chemical restraints as such, and most studies approach the subject via prevalence of psychotropic medication prescription with focus on antipsychotics, anxiolytics, and hypnotics (Hughes and Lapane, Reference Hughes and Lapane2005; Phillips et al., Reference Phillips, Spry, Sloane and Hawes2000; Richter et al., Reference Richter, Mann, Meyer, Haastert and Köpke2012).

To reduce the use of chemical restraint and promote quality prescription of psychotropic drugs in institutionalized settings, a panel of experts created the CHROME (CHemical Restraints avOidance MEthodology) criteria (Olazarán-Rodríguez et al., Reference Olazarán-Rodríguez2016). The panel members were experts from psychiatry, neurology, geriatrics, psychology, pharmacology, as well as the legal and managerial fields. The organizational and procedural aspects of the CHROME criteria were designed for institutionalized people with dementia. However, the diagnostic and treatment recommendations allow application in other situations where disruptive disorders may potentially put the person at risk of being subjected to chemical restraint.

The CHROME criteria define chemical restraint as: a) any drug prescribed out of organizational convenience and/or b) any drug that is not prescribed to treat any of the six neuropsychiatric syndromes (as defined in Appendix Table 1) that cause significant patient suffering. In contrast to the definition of the CMS, this more precise definition allows an external physician to more accurately identify possible or definite chemical restraint as well as making quality prescription audits feasible. Furthermore, these criteria provide listings of admissible drugs and dosages for each syndrome; norms for the acquisition, use, and disposal of psychotropic drugs; legal requirements like the kind of informed consent by type of situation; and most importantly, a method to externally verify (audit) the prescription quality of psychotropic drugs of any given nursing home. In the case of a favorable audit result, the home is awarded an accreditation of “Chemical restraint-free home according to the CHROME criteria,” backed by the Confederación Española de Asociaciones de Familiares de Enfermos de Alzheimer (CEAFA) i.e. the Spanish National Alzheimer’s Association. An updated version of the CHROME criteria is freely available as an online appendix to this article.

The objective of this validation study was to describe the evolution of psychotropic drug prescription as well as other potentially related variables during the training and consultancy process. The several components involved culminated with the accreditation of a nursing home as a “chemical restraint-free center,” issued by CEAFA, which independently made the audit applying Maria Wolff Foundation’s CHROME criteria. On November 2017, the Association’s chairperson issued the accreditation confirming that the facility fully complied with all the requirements set by the CHROME criteria. Neither definitive nor possible chemical restraints were found, and quality prescription criteria were met on randomly selected cases as well as those cases picked by the auditor after visual inspection of the home (Appendix Table 1). The figures of the study’s last wave were recorded two weeks after the audit. In addition to drug-related figures, the study reports the evolution of fall rates, physical restraints, and diagnoses of neuropsychiatric syndromes.

Methods

Design

This was an observational, longitudinal, prospective study in which data of residents of a single nursing home were semi-annually extracted at six dates (study waves) from December 2015 to December 2017.

Ethics

Approval for the study was obtained from an institutional ethics committee (University of La Laguna, Tenerife, Spain).

Setting

The nursing home that was object of the present study is integrated in a lager sociosanitary complex located in the city of Las Palmas on the island of Gran Canaria (Spain). Five wards with 215 beds for people with dementia or highly dependent elderly people were included in the study. The other four wards offer day care for the elderly with or without dementia and 72 mental health beds. A total of 448 people are cared for. The “Centro Sociosanitario El Pino” has been managed since 2010 by the ICOT Health Group through a contract with the local authority “Instituto de Atención Social y Sociosanitaria” of the “Cabildo de Gran Canaria.” Led by the Maria Wolff Foundation, El Pino initiated in 2014 a comprehensive training program for all its professionals aimed at preventing and treating behavioral and psychological symptoms of dementia (BPSD), eliminating physical and chemical restraints, and promoting dementia-friendly care and person-centered care to all its residents. Since the program was conceived and developed for the care of institutionalized people with dementia, the psychiatric and day care residents were not included in the study.

It is noteworthy that El Pino holds unusually good staffing ratios for Spanish standards. For example, nurse aid staffing is more than adequate (e.g. two nurse aids in the night shift per ward of 40 residents, in addition to other medical staff like registered nurses or 24-hour medical doctor). In addition, four full-time psychologists and five medical doctors under one medical coordinator provide psychological and medical care for the 215 residents. Activities manager, occupational therapists, and physiotherapists are also available with an adequate staff to resident ratio. Senior and middle management positions are held in part by psychologists, which contributes to the organization’s commitment with nonpharmacologic treatment and psychoactive drug treatment containment.

Study variables

The primary outcome variable was the frequency of prescription of psychotropic medications, which were divided into the following categories: typical neuroleptics, atypical neuroleptics, antidepressants, hypnotics (short/intermediate half-life benzodiazepines, benzodiazepine derivatives, clomethiazole), long half-life benzodiazepines, dementia-specific medications (cholinesterase inhibitors [CEI], memantine), and antiepileptics. The prescription of psychotropics was coded as yes or not, either continuous or PRN prescription, in the previous week to the study wave. In the case of continuous prescriptions, the daily dose was also registered.

In addition, the following study variables were collected:

  • Age and sex, in the first date of study inclusion.

  • Total number of prescribed medications for any condition, as registered in the electronic medical history, at the date of the study wave.

  • Dementia, when the resident was first included in the study, according to American Psychiatric Association criteria (2013) or <24 score in the Spanish version of the Mini-Mental State Examination (Lobo et al., Reference Lobo1999).

  • Presence of neurospychiatric syndromes, according to CHROME criteria (Appendix Table 1), at the date of the study waves, as diagnosed by the consensus of psychologist and physician. The category of possible syndrome was utilized when there was suspicion of neuropsychiatric syndrome without sufficient diagnostic confidence or information.

  • Performance in basic activities of daily living, according to the Barthel Index (Cid-Ruzafa and Damián-Moreno, Reference Cid-Ruzafa and Damián-Moreno1997), closest to the study waves.

  • Risk of falling, according to the Downton Index (Aranda-Gallardo et al., Reference Aranda-Gallardo2015), closest to the study waves.

  • Falls accumulated in the six months before the date of the study wave. Three types of falls were recorded: non-injurious falls, falls with hip fracture, and falls with any other complication.

  • Any kind of physical restraint for at least a week, at the date of the study wave. Bed rails were excluded from the definition of physical restraint in accordance with previous reports (Ljunggren et al., Reference Ljunggren, Phillips and Sgadari1997).

  • Referrals to the emergency room department in the six months previous to the date of the study waves.

  • Death, when occurred between two consecutive study waves.

Since the specific CHROME training was initiated on April 2016 (i.e. between the dates of the first and second study waves), the diagnoses of neuropsychiatric syndromes were not collected at the first study wave. Falls and emergency room referrals began to be systematically recorded on December 1, 2015, and, for that reason, data regarding those variables were also lacked for the first wave. All the other study variables were prospectively collected as part of the center’s usual assessment protocol. Figures of falls, emergency room referrals, and death were expressed as number of events per 100 fully occupied beds per year (RPY).

Intervention

A total of four training sessions adding up to 16 hours per employee were delivered to about 200 staff members over a period of three years. The employees who were trained ranged from senior management and physicians to nurse aids or maintenance personnel. These programs had the transformative aims to a) build a dementia friendly culture, b) prevent and treat BPSD non-pharmacologically or in combination with drugs, and c) implement a comprehensive physical restraint reduction program. Implementation of the three programs was systematically followed up with formal videoconferences covering consultancy and discussion of clinical cases. The essential components of the Maria Wolff Foundation physical restraint-free care program for nursing homes have been described in detail elsewhere (Muñiz et al., Reference Muñiz2016). These components are basically training, consultation, and consultancy provided at various levels of the organization with special focus on genesis, prophylaxis and management of BPSD, environmental modifications, and person-centered care philosophy. The steps and contents of the intervention implemented in El Pino are summarized in Figure 1.

Figure 1. Maria Wolff Foundation’s physical and chemical restraints training and consultancy programs.

Once the physical restraint reduction program was fully under way, the CHROME criteria were implemented simultaneously: medical doctors, psychologists, nurses, managers, and the pharmacist received eight hours of training in CHROME criteria. To identify possible or definitive chemical restraints or inappropriate prescription, all the patients had to be diagnosed at each study wave. To ensure diagnostic accuracy, psychologists and medical doctors made their diagnoses separately and tried to reach diagnostic consensus case by case. These diagnoses were the basis by which physicians then applied the prescription guidelines delivered by the CHROME criteria. The center’s pharmacist helped to avoid undesired interactions and kept the study database up to date regarding drugs. The study director of the CHROME criteria (JO) provided ad libitum videoconference, e-mail, and telephone support.

Data extraction and statistical analysis

Pharmacological and medical data were extracted from the center’s software/database (Aegerus, Sabadell, Spain) to MS Excel 2010 (Microsoft, Redmond, WA) by the center investigators. Diagnostic data were produced by the medical doctors and psychologists and manually recorded in the mentioned spreadsheet. Data were reviewed for potential artifacts and errors by the principal investigator (RM), the study director (JO), and one of the center’s psychologists (FC) and then exported from MS Excel into SPSS v.15.0 (SPSS Inc., Chicago, IL) for analysis.

Measures of frequency, central tendency, and dispersion were utilized to describe the residents’ characteristics and to analyze the evolution of the study variables across the five study waves. The evolution of residents who had dementia and remained in the nursing home throughout the complete study period was specifically analyzed (completer analysis) as these were the cases that can benefit most from the study intervention and therefore validate the CHROME criteria. Nonparametric statistics were applied for the analysis of psychotropic medication prescription and other study variables in those subjects, taking as reference the first measurement. Given that frequency of psychotropic prescription was the primary study outcome and since there were seven groups of psychotropic medications, the level of statistical significance was set at p<0.007.

Results

A total of 288 residents were studied across the five study waves. Mean age at study inclusion was 81.6 years (SD 10.6, range 38-104), 183 (63.5%) of the participants were female and 223 (77.4%) of them had dementia. The demographic and clinical variables of the residents across the five study waves are presented in Table 1. As expected, the participants were polymedicated, had a high risk of falls, and had high functional dependence. There was a prevalence of physical restraint of 35.1% in the first wave, which was progressively reduced and culminated with complete absence of physical restraints at the end of the study. Those results were accompanied by an increase of noninjurious falls (from 88.7 to 105.1 RPY), falls with complication different from hip fracture (from 12.0 to 30.3 RPY), and emergency room referrals (from 35.9 to 44.5 RPY). However, falls with hip fracture did not increase significantly, and demise was progressively decreased across the study waves (Table 1).

Table 1. Study variables in the total sample of residents across the five study waves

Figures represent mean (SD), frequency (95% confidence interval), or number of events per 100 beds per year (RPY); 1PRN prescriptions are included. ADL: activities of daily living; BI: Barthel Index; BZD: benzodiazepines; CEI: cholinesterase inhibitors; DI: Downton Index; n: number; NC: not collected.

The mean number of psychotropic prescriptions per resident was 1.6 (SD 1.3, range 0-5) at the beginning of the study and 1.0 (SD 1.1, range 0-5) at the end. At the beginning of the study, prescription was particularly frequent for antidepressants (45.0%), atypical neuroleptics (43.8%), and hypnotics (35.6%). At the end of the study, frequency of prescription was significantly reduced for atypical neuroleptics, long half-life benzodiazepines, and hypnotic medications (Table 1). “As needed” (PRN) prescriptions were frequently observed for neuroleptics, long half-life benzodiazepines, or hypnotics at the beginning of the study (30.7% [CI 95% 22.4-37.0]) but were reduced at the end (4.7% [CI 95% 1.8-7.5]). Significant dose changes could not be detected across the study waves, although the number of patients that remained on the different medications was low. For instance, the mean dose (SD) of quetiapine -the most frequently prescribed neuroleptic- was 140.6 (115.7) mg/d in the first wave (n = 28) and 132.1 (77.5) mg/d in the last wave (n = 14); the corresponding figures for lormetazepam, which was the most frequently prescribed hypnotic, were 1.4 (0.9) mg/d (n = 12) and 0.9 (0.2) mg/d (n = 7) (all p values >0.05, results of medication dose are not shown).

There were 107 residents with dementia, who remained in the nursing home during the complete study period. The mean (SD) age of those residents was 84.2 (8.5) years, and 76.6% of them were female. The evolution of the study variables of these completer subjects is presented in Table 2. In this group, a significant reduction of psychotropic medication was confirmed for atypical neuroleptics, which fell from 42.7% to 18.7% of prescription frequency; for hypnotics, which fell from 47.7% to 12.1%, and for long half-life benzodiazepines, which fell from 25.2% to 6.5%. Considering only neuroleptic, long half-life benzodiazepines, and hypnotic medications, the total number of prescriptions per patient fell from 1.1 (SD 1.1, range 0-5) to 0.4 (SD 0.7, range 0-3), p<0.05 (Figure 2). The observed reduction of psychotropic prescription and elimination of physical restraints were accompanied by a decrease of falls (from 67.3 RPY to 32.7 RPY) and a decrease of emergency room referrals (from 20.6 to 7.5).

Table 2. Results in the residents which had dementia and completed the five study waves (n = 107)

Figures represent mean (SD), frequency (95% confidence interval), or number of events per 100 beds per year (RPY).

1 PRN prescriptions are included;

2 for the comparison between the last and the first measurement (Wilcoxon test). ADL: activities of daily living; BI: Barthel Index; BZD: benzodiazepines; CEI: cholinesterase inhibitors; DI: Downton Index; n: number; NA: not applicable; NC: not collected; RPY: per 100 beds and year.

Figure 2. Evolution of certain (solid) and possible (light) neuropsychiatric diagnoses while physicians learned to use the CHROME criteria (up), total number of prescriptions for the most dangerous medications and frequency of physical restraints (down), across the study waves. BZD: benzodiazepines.

An increase in the confidence in the diagnosis of neuropsychiatric syndromes was observed, along with trends of decrease in frequency for the diagnoses of psychotic syndrome (from 13.1% to 4.7%), impulsive syndrome (from 14.0% to 7.5%), maniform syndrome (from 4.7% to 0.0%), and sleep alteration (from 15.9% to 8.4%). Only the frequency of anxiety syndrome remained elevated (31.8%) at the end of the study period (Table 3 and Figure 2).

Table 3. Evolution of neuropsychiatric diagnoses (n=107)

Figures represent frequency (95% confidence interval). NC: not collected.

Discussion

The external audit and the results herein reported show a complete elimination of physical and chemical restraints, along with an overall reduction of psychotropic medication, particularly for residents with dementia. In these patients, falls and emergency room referrals were also reduced. Overall, these results validate the CHROME criteria as a feasible, efficient, and safe tool to optimize the quality prescription of psychotropic medications in institutionalized people with dementia.

We believe that the definition of relatively stringent diagnostic criteria for people with dementia who present clinically significant neuropsychiatric syndromes (Appendix Table 2) turned out to be the primary key success factor to change prescription behavior, attain quality prescription, and secondarily reduce the frequency of the most dangerous medications. The observed trends of decrease in frequency of diagnoses for most neuropsychiatric syndromes suggests a previous overdiagnosis and supports the usefulness of the definitions provided. Figure 2 reflects how reduced frequency of diagnoses (all except anxiety syndrome) was associated with the reduction of neuroleptic, benzodiazepine, and hypnotic prescriptions.

The second key success factor had an organizational nature: attaining the Quality Seal of CHROME Criteria Compliance, which was awarded by an external audit, motivated management, psychologists, physicians, and other staff to make the effort in treating behavioral or psychological symptoms with environmental and nonpharmacological strategies more thoughtfully. The temptation of using drugs as shortcuts was avoided through the stringency of the CHROME criteria.

In contrast to the rest of the syndromes, the prevalence of anxiety remained high at the end of the study. There are three explanatory factors for that result: 1) Sleep disorder or even impulsive and psychotic syndromes might have been reclassified to anxiety as the primary syndrome; 2) At the beginning of the study, physicians and psychologists did not clearly differentiate symptoms from syndromes. Put in a blunt example, sadness (reactive) due to nursing home placement does not necessarily meet depressive syndrome criteria; 3) Anxiety disorders are highly prevalent in older adults living in long-term care facilities (Seitz et al., Reference Seitz, Purandare and Conn2010). In an observational study conducted in people with dementia, significant anxiety was found in 33.7% of the residents remaining so after one year (31.2%) (Goyal et al., Reference Goyal, Bergh, Engedal, Kirkevold and Kirkevold2018).

The present study has several limitations. Though large, we described results of only one nursing home. Prevention of delirium and other potential physical benefits of the psychotropic medication reduction were not specifically recorded. The frequency and severity of behavioral and psychological symptoms at the beginning and end of the study were not quantitatively measured, as were not quality of life of residents and professional caregivers. The authors, nevertheless, believe that the changes in drug prescription did in no way worsen patient well-being (agitation, etc.). The four study psychologists (FC, MP, NR, AL) were vigilant in regard to the improvement-worsening of all residents and did not report any salient negative effects besides some residents being more demanding. Moreover, cases considered difficult were treated in clinical sessions with the study director (JO), and the principal investigator (RM) and solved acceptably.

The CHROME criteria require some investigative efforts on the physician’s side, which might be perceived as more time consuming, especially in the beginning. Future research must clarify if optimized prescription settles in as a constant cultural component of the care home, since turnover of both residents and clinicians might thin a home’s achievements over time.

Most articles published to improve prescription of psychotropics in people with dementia have focused on frequency (Janus et al., Reference Janus, van Manen, IJzerman and Zuidema2016; Richter et al., Reference Richter, Mann, Meyer, Haastert and Köpke2012), prescription factors (Brimelow et al., in press; Nørgaard et al., Reference Nørgaard, Jensen-Dahm, Gasse, Hansen and Waldemar2017), and BPSD. The “frequency and BPSD” approach has recently been described in an intervention using patient-centered medication reviews for BPSD (Massot Mesquida et al., Reference Massot Mesquida, Tristany Casas, Franzi Sisó, García Muñoz, Hernández Vian and Torán Monserrat2019). In contrast to this more common approach, the CHROME criteria propose to focus on adequacy of prescription based on predefined neuropsychiatric syndromes, which appear as a result of a cerebral biological imbalance. From there, adequacy and frequency issues are implicitly solved in a relatively simpler and safer way (Appendix Tables 2 and 3).

The CHROME criteria can easily be applied by any physician, be it for community dwelling or institutionalized people with dementia. Clear definition of chemical restraint and ease for third-party verification add objectivity and organizational possibilities. The criteria can easily be adapted to other countries adjusting to local drugs, legal requirements concerning drug purchase, storage and disposal, as well as kinds of informed consent.

Conflict of interest

RM and JO received honoraria from ICOT for their consultancy and training services outside of this study.

Description of the authors’ roles

R. Muñiz conceived the CHROME criteria, contributed to the study design, supervised the data collection, conducted statistical analyses, wrote part of the article, and coordinated all other coauthors’ contributions. A.I. Pérez-Wehbe organized the study inception and reviewed the paper. F. Couto participated in neuropsychiatric diagnoses, supervised data extraction, and reviewed the paper. M. Pérez oriented physicians in treatment options, collected data, and reviewed the paper. N. Ramírez participated in neuropsychiatric diagnoses, collected data, and reviewed the paper. A. López supervised the entire study process, organized the external audits, and reviewed the paper. J. Rodríguez coordinated the physician’s participation and reviewed the paper. T. Usieto and L. Lavin implemented prescriptions according to the CHROME criteria and gave valuable feedback to the research team. A. Rigueira provided CHROME criteria’s pharmaceutical drug management and reviewed the manuscript. L. Agüera-Ortiz and J. López-Alvarez contributed to the definition of neuropsychiatric syndromes and to the treatment guidelines and reviewed the paper. M. Martín-Carrasco assisted in writing the manuscript. J. Olazarán contributed to the definition of neuropsychiatric syndromes, participated in the study design, trained the study physicians, and wrote the paper.

Acknowledgments

The principal investigator and the study director thank Juan Luis Beltrán and Pilar García for their invaluable support regarding legal and bio-ethic issues related to both physical and pharmacological restraints that are woven into this article. Jesús Mª López-Arrieta for his contributions from the geriatric perspective.

Supplementary material

To view supplementary material for this article, please visit https://doi.org/10.1017/S104161021900111X.

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Figure 0

Figure 1. Maria Wolff Foundation’s physical and chemical restraints training and consultancy programs.

Figure 1

Table 1. Study variables in the total sample of residents across the five study waves

Figure 2

Table 2. Results in the residents which had dementia and completed the five study waves (n = 107)

Figure 3

Figure 2. Evolution of certain (solid) and possible (light) neuropsychiatric diagnoses while physicians learned to use the CHROME criteria (up), total number of prescriptions for the most dangerous medications and frequency of physical restraints (down), across the study waves. BZD: benzodiazepines.

Figure 4

Table 3. Evolution of neuropsychiatric diagnoses (n=107)

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