Monitoring Polypharmacy in Healthcare Systems Through a Multi-Setting Survey: Should We Put More Attention on Long Term Care Facilities?

Abstract

Background

Polypharmacy is a main issue of patient safety in all healthcare settings (i.e. increase adverse drug reactions and incidence of drug-drug interactions, etc.). The main object of the study was to evaluate the prevalence of polypharmacy and the appropriateness of drugs prescriptions in the regional health system (RHS) of Friuli Venezia-Giulia Region, Italy.

Design and methods

We carried out a point prevalence study in May 2014; 1582 patients ≥65 years were included from: 14 acute hospitals, 46 Long Term Care Facilities (LTCFs) and 42 general practitioners’ (GPs) clinics. Data analysis included the evaluation of potentially inappropriate prescriptions (PIPs) taking Beers criteria as a reference.

Results

Patients in therapy with 10 drugs or more were 13.5%: 15.2% in hospitals, 9.7% in GPs’ clinics and 15.6% in LTCFs. According to Beers criteria we identified 1152 PIPs that involved globally almost half of patients (46.0%): 41.9% in hospitals, 59.6% in LTCFs and 37.0% in GP’s clinics. The 53.9% of patients received at least one mainly kidney excreted drug; for these patients the evaluation of serum creatinine was overall present in the 87.7% (747/852): 96.4% in hospital ones, 87.5% in GPs’ clinics and 77.8% in LTCFs. LTCFs residents were significantly (P<0.05) more exposed to PIPs and less monitored for the renal function.

Conclusions

A reliable estimation of the phenomenon in all the main healthcare settings is a necessary prerequisite to set tailored policies for facing polypharmacy within a RHS; the results showed the necessity to put a special attention on LTCFs.

Significance for public health.

We believe that our research is appropriate for your journal because concerns a very important issue for healthcare systems: the management of drugs in elderly people, in particular our study evaluated the topic of polypharmacy and potentially inappropriate prescriptions in a whole regional healthcare system, considering the three main care settings: acute hospitals, long term care facilities and general practitioners’ clinics. We also analysed the problem included all the medications that patients assumed, not only ones that were reimbursed by healthcare system. Considering these premises this study permitted to have a wide point of view for setting tailored policies and it underlines the importance of creating a system that starts from real data and in this way will allows to compare and measure improvement actions.

Introduction

Polypharmacy represents a main patient safety issue in all healthcare settings worldwide.¹ Although it can potentially concern people of any ages, the elderly are most frequently involved: the availability of a greater number of drugs, the increase of life expectancy and a higher prevalence of chronic diseases represent the main reasons for a higher incidence in this population.²

Many definitions of polypharmacy, both qualitative and quantitative, are currently used: medication does not match the diagnosis, excessive use of medication, duplication of medication, medication prescribed to treat the side effect of another medication,³ but the simultaneous intake of many medications (generally five or more) is the one more frequently adopted.^4-6

The prevalence of polypharmacy in Europe ranges from to 33.8% to 73.3% depending on definition reported;^7,8 official data regarding the prevalence of polypharmacy in Italian elderly (approximately 12 million of people ≥65 years old) report that 6 million people were treated with 5-9 drugs and 1.3 million with 10 drugs or more.⁹ These data potentially underestimate the phenomenon because they did not include medications not reimbursed by the national pharmaceutical formulary, such as benzodiazepines and some of non-steroidal antiinflammatory drugs (NSAIDs).

Possible consequences of polypharmacy include: increase of adverse drug reactions (ADR), incidence of drug-drug interactions, decrease in patient compliance to treatment, increase of risk of falling, inability and cost increase for healthcare system,^10-13 due to an higher rate of hospitalisation, morbidity and mortality.

Although general data are available on polypharmacy, only few ones are available about its presence in the main healthcare settings: primary care, LTCFs and hospitals. A detailed picture at healthcare system level is, in fact, a first step for facing polypharmacy. This paper reports the results of a multi-setting survey on polypharmacy conducted in a regional healthcare system with the aim to identify strengths and weaknesses of the different settings as premise for the definition of tailored actions.

Design and Methods

The study was carried out in the regional healthcare system (RHS) of Friuli Venezia Giulia (FVG), Italy, in March 2014 and explored the three main settings that provide care to elderly: a) all the fourteen public and private acute hospitals of the RHS, b) 46 (out of 90) long term care facilities (LTCFs) (22 nursing homes and 24 long term chronic care facilities) and c) 42 volunteer general practitioners (GPs) representing all the 22 local health districts of RHS.

Eligible people were all the 65 years old or more who, at the moment of the survey, were taking at least one chronic or acute drug. Oncologic drugs and topical medications (i.e. eye-drops and ointments) were excluded as well as homeopathic and natural ones.

The sample was recruited applying a specific approach in each setting: a) for hospitals all the eligible patients discharged from internal medicine, geriatrics, cardiology and neurology wards in seven consecutive working days; b) for LTCFs, that included two types of facilities differing by intensity of care and length of stay, we carried out the survey in a single day and included the 30% (randomly selected) of eligible residents (from an overall sample of 739 residents) in long-term chronic care facilities and the 10% in the nursing homes (from an overall sample of 2410 residents). The selected survey index day for LTCFs was the first one of the survey in hospitals and GPs, this choice was made to avoid the bias that residents in LTCFs could be re-evaluated during a following admission in hospital; c) for GPs the sample was composed by the first two eligible people who accessed to the GPs’ clinics each day for seven consecutive working days. For each patient we anonymously collected: age, gender, weight, most recent blood values of creatinine (within a year), presence of specific chronic diseases, prescribed medication name, the therapy dose and length. All prescribed medications were collected, also not RHS reimbursed and pro re nata (PRN) therapy. The survey methodology was preliminary tested in two wards (geriatrics and cardiology) of two hospitals and in three LTCFs. Moreover a two hours course to train data collectors was organised by the coordination team and included all the 60 professionals involved in the survey.

Data were collected by reviewing medical records for hospitalised patients and LTCFs residents; for outpatients all necessary information was provided by the GPs through their electronic databases.

Medications were classified following the Anatomical Therapeutic Chemical (ATC). On the basis of available literature on topic,^4-6 exposition to medications was stratified into three classes: from 1 to 4, from 5 to 9 (polypharmacy) and 10 or more (hyper-polypharmacy).

We also analysed the presence of potentially inappropriate prescription (PIP) defined using the 2012 Beers Criteria.¹⁴

The study protocol was approved by the Regional Ethical Committee in March 2014.

Categorical variables were compared using Shapiro-Wilk test for evaluating normality, Pearson test for linear correlation, Kruskal-Wallis test for non-parametric data and logistic regression model. We accepted a P<0.05 as a significant value.

All data analysis was performed using IBM SPSS Statistics 20.

Results

The survey involved overall 1582 patients; their characteristics, stratified by setting, are summarised in Table 1.

Table 1.

Studied population characteristics by explored setting.

	Hospitals (n. 528) n. (%)	GPs (n. 527) n. (%)	LTCFs (n. 527) n. (%)	Overall (n. 1582) n. (%)
Females	261 (49.3)	302 (57.3)	371 (70.4)	934 (59.0)
Age classes
65-74	128 (24.2)	233 (44.2)	69 (13.1)	430 (27.2)
75-84	205 (38.8)	203 (38.5)	183 (34.7)	591 (37.4)
≥85	195 (36.9)	91 (17.3)	275 (52.2)	561 (35.5)
N. of prescribed drugs
1-4	139 (26.3)	223 (42.3)	157 (29.8)	519 (32.8)
5-9	309 (58.5)	253 (48.0)	288 (54.6)	850 (53.7)
≥10	80 (15.2)	51 (9.7)	82 (15.6)	213 (13.5)
Number of diseases
0-1	80 (15.2)	51 (9.7)	83 (15.7)	214 (13.5)
2-4	317 (60.0)	300 (56.9)	342 (64.9)	959 (60.6)
≥5	131 (24.8)	176 (33.4)	102 (19.4)	409 (25.9)

The mean±SD age of the study population was 80.5±8.4, with a significant variability (P<0.05) by setting: hospitals 80.8±8.1, GPs 76.7±7.8 and LTCFs 84.1±7.8. Females were the majority 54.7% (323/591) and 74.9% (420/561) respectively in the 75-84 and in the 85 or more classes of age, while males were the majority in the 65-74 class 55.6% (239/430). Almost all patients (96.4%) suffered at least of one disease with a mean ±SD of 3.4±1.5 diseases for patients (range from 0 to 12): hospitals 3.2±1.8, GPs 3.1 ±2.0 and LTCFs 3.2±1.7. Hypertension resulted the most common reported chronic disease 60.2% (953/1582), followed by arrhythmic disorders 27.7% (438/1582), heart diseases 25.9% (410/1582), diabetes mellitus 25.8% (408/1582), arthropathy 25.5% (403/1582) and cerebro-vascular artery disease 25.3% (400/1582). The most common associations resulted: hypertension and diabetes mellitus 17.9% (283/1582), hypertension and arrhythmic disorders 17.6% (278/1582) and hypertension and heart diseases 17.2% (272/1582).

The mean ±SD number of prescribed drugs for each patient resulted 6.1±3.0. The mean number was significantly lower (P<0.05) for GPs’ outpatients (5.5±3.0) than for hospitalised patients (6.4±2.9) and LTCFs residents (6.3±2.9). There was a moderate significant linear correlation (P<0.05) between the numbers of diseases and number of drugs assumed (Pearson’s test 0.37).

Cardiovascular system (36.3%, 3485 out of 9599), alimentary tract and metabolism (20.0%, 1923 out of 9599) and blood and blood forming organs (14.9%, 1427 out of 9599) were the three ATC drugs categories most frequently prescribed; Table 2 specifies the five most common ATC classes for each setting.

Table 2.

The five most common prescribed drug classes stratified by setting.

Hospitals (n. 3386) Drug class	n.	%	General practitioners (n. 2872) Drug class	n.	%	LTCFs (n. 3341) Drug class	n.	%
B01 Antithrombotic agents	481	14.2	C09 Agents acting on the renin-angiotensin system	374	13.0	B01 Antithrombotic agents	425	12.7
A02 Drugs for acid related disorders	379	11.2	B01 Antithrombotic agents	330	11.5	A02 Drugs for acid related disorders	380	11.4
C03 Diuretics	315	9.3	C10 Lipid modifying agents	222	7.7	N05 Psycholeptics	284	8.5
C09 Agents acting on the renin-angiotensin system	267	7.9	A02 Drugs for acid related disorders	214	7.5	C03 Diuretics	251	7.5
C07 Beta blocking agents	243	7.2	C07 Beta blocking agents	191	6.7	C09 Agents acting on the renin-angiotensin system	211	6.3

We observed that 53.9% (852/1582) of patients received at least one mainly kidney excreted drug (ramipril, metformin, allopurinol, digoxin, enalapril, nebivolol, levofloxacin, atenolol, levetiracetam and pregabalin); for these patients the evaluation of serum creatinine (necessary for estimating renal function) was overall present in the 87.7% (747/852), with significant difference in the three settings (P<0.05): 96.4% (295/306) in hospital ones, 87.5% (245/280) in GPs’ clinics and 77.8% (207/266) in LTCFs.

According to Beers criteria we found 1152 PIPs that involved almost half of patients (46.0%, 728 out of 1582): 41.9% (219/528) in hospitals, 59.6% (314/527) in LTCFs and 37.0% (195/527) in GP’s clinics; Table 3 shows the univariate analysis and the logistic regression model for the presence of at least one PIP.

Table 3.

Logistic regression model and univariate analysis of the presence of at least one potentially inappropriate medication (PIP) for Beers criteria.

	Presence of at least one PIP		Univariate analysis			Logistic regression
	Patients exposed	Patients not exposed	Sig.	OR	95% CI	Sig.	OR	95% CI
Gender			0.02	1.26	1.03-1.55	0.08	1.22	0.97-1.53
Female	452	482
Male	276	372
Age class			0.00	1.52	1.18-1.95	0.26	1.19	0.90-1.56
75-84	284	307
65-74	163	267
Age class			0.00	1.64	1.27-2.12	0.47	1.12	0.83-1.50
≥85	281	280
65-74	163	267
Setting			0.00	0.48	0.38-0.62	0.00	0.46	0.35-0.60
Hospitals	219	309
LTCFs	314	213
Setting			0.00	0.40	0.31-0.51	0.00	0.46	0.35-0.60
GPs	195	332
LTCFs	314	213
Diseases			0.04	1.56	1.15-2.12	0.16	1.26	0.91-1.76
2-4	448	511
0-1	77	137
Diseases			0.01	1.75	1.25-2.46	0.33	1.21	0.83-1.76
≥5	203	206
0-1	77	137
Prescribed drugs			0.00	2.81	2.22-3.55	0.00	2.77	2.16-3.54
5-9	439	411
1-4	143	376
Prescribed drugs			0.00	5.73	4.05-8.11	0.00	5.60	3.87-8.12
≥10	146	67
1-4	143	376

All 1582 patients were included in the logistic regression model and we evaluated the parameters that resulted statistically significant (P<0.05) in the univariate analysis. Results highlight that the risk of PIP increases with the number of assumed drugs (OR 2.77 and 5.60 respectively for 5-9 class and ≥10 class compare to 1-4); also the setting has an important influence, in fact hospital and GPs’ patients have a significantly lower risk (OR 0.46 for both) compared to elderly people in LTCFs.

Discussion and Conclusions

The study was carried out to obtain an overall picture of medications use in elderly people for the different RHS settings; sample heterogeneity was a necessary requisite to understand the problem in all its complexity; the three involved settings represent the main care providers for elderly in the RHS so a specific knowledge of their situation was considered an essential prerequisite for the definition and implementation of actions and setting policies.

In this perspective, the prevalence survey was the methodology for reaching our goal; it allowed us both to recruit many patients in a limited time and to collect all the prescribed drugs (included RHS not reimbursed and PRN ones), two requisites necessary for a thorough picture as close as possible to reality. Furthermore this approach was able to overcome the existing differences in the way clinical data are reported, collected and stored in the 3 different settings and within each setting. The sample recruitment was set with different methodologies in the three settings adopting a tailored strategy for the different characteristics of patients’ stay: acute ones, residents and outpatients.

The overall prevalence of polypharmacy (67.2%) was quite similar to the results (61.0%) of the national prevalence study conducted by Geriatric Working Group of Italian Agency of Drugs (AIFA) in 2011;¹⁵ the gap between the two scenarios could be explained by the absence of the not reimbursed drugs by national pharmaceutical formulary in the AIFA one. Reliability of our data can also be confirmed by the increase in number of chronic diseases correlated to the number of prescribed drugs, as highlighted in literature.^16,17

Taking Beers criteria as reference,¹⁴ the survey revealed that approximately half of patients (46.0%) had at least one PIP in their therapy, substantially similar to the results of other available experiences which analysed only single settings.^18,19 In our case, the analysis by setting allowed a comparison and LTCFs emerged as most critical: almost 6 patients out of 10 presented a PIP. This result was significantly higher (P<0.05) compared to the other settings, also considering that the majority of LTCFs residents were followed by their own GPs and that in LTCFs the prevalence of 5 or more diseases was lower compared to GPs’ outpatients.

Furthermore through this approach we found that one of the main causes of PIPs occurrence was the significant (P<0.05) higher use of psycholeptic drugs in LTCFs compared to the other two settings.

Also data regarding the evaluation of renal function for patients who were taking at least one drug with renal excretion confirmed that LTCFs had a lower level of compliance compared to the other two settings; this is an important issue for patient safety because the knowledge of renal function is necessary to adapt drugs doses and to prevent accumulation complications.

The study identified a problem that must be necessarily considered primary for patient safety in a context of regional risk management approach, the stewardship of long term care providers for elderly also considering the emerging change in population demography.

A strength of the proposed approach is the ability to provide a full view of the state of the art about drugs prescription quality in a RHS; it could potentially be a starting point for policies aimed to improve patient safety and safer drug use: based on these results it is possible to communicate the state of the art to all interested stakeholders and to set tailored improvement programmes. Although there are many papers describing polypharmacy in elderly population almost all of them explored only one care setting and did not included systematically all prescribed drugs.

Regional plans should consider educational programmes for prescribes, continuous data flow on drugs use to all healthcare practitioners, sharing of good practices about drugs management (i.e. the periodic re-evaluation of patient’s therapy, the careful check of possible drug-drug interaction and of potentially inappropriate medications, etc.) and patient literacy on drugs use;^20,21 further medication reconciliation should be systematically applied in all the healthcare settings and with particular attention in LTCFs, as they showed the greatest polypharmacy concern.

The routinely evaluation of renal function in elderly patients taking mainly kidney excreted drugs is one of the most important, and possibly less expensive, improvement initiatives suggested by our findings and it will be a priority for ensuring the right dose of drugs in this way preventing accumulation.

These data as well as their periodical repetition could be very helpful both in making clear different aspects of the problem locally and monitoring possible progresses.

The proposed approach had also some limitations and particularly, first one was that GPs’ recruitment for outpatients was only possible on voluntary basis and it consequently could had selected the more motivated ones; another one was that GPs’ outpatients, in spite of presence of higher prevalence of diseases, were usually more independent for own care management compared to LTCFs ones. Furthermore the adoption of only the Beers criteria could have underestimated PIPs rate if compared with studies that utilised also Screening Tool of Older Persons’ Potentially inappropriate Prescriptions (STOPP),^22,23 but for our aim it was more important adopting an unique standardised tool that allows us to compare the three settings.

In conclusion, the availability of reliable estimation of the phenomenon in all the main healthcare settings of RHS is a necessary pre-requisite for setting up effective policies aimed to control polypharmacy. In our context LTCFs seemed to need special attention compared to hospitals and GPs’ clinics. The definition of policies and programmes at health system level needs a periodical monitoring of polypharmacy in the main settings of the system (primary care, LTCFs and hospitals) and setting tailored interventions for improving and promoting medication reconciliation process and drug management.