BMJ  2005;330:20 (1 January), doi:10.1136/bmj.38268.579097.55 (published 23 November 2004)

Primary care

Concealment of drugs in food and beverages in nursing homes: cross sectional study

¹ Norwegian Centre for Dementia Research, Vestfold Mental Health Care Trust, Tønsberg, Postbox 64, N-3107 SEM, Norway, ² Norwegian Centre for Dementia Research, Department of Geriatric Medicine, Ullevaal University Hospital, Oslo, Norway

Abstract

Objective To examine the practice of concealing drugs in patients' foodstuff in nursing homes.

Design Structured interview study with data collected by structured interview.

Setting All five health regions in Norway.

Participants Professional carers of 1362 patients in 160 regular nursing home units and 564 patients in 90 special care units for people with dementia.

Main outcome measures Frequency of concealment of drugs; who decided to conceal the drugs; how this practice was documented in the patients' records; and what types of drugs were given this way.

Results 11% of the patients in regular nursing home units and 17% of the patients in special care units for people with dementia received drugs mixed in their food or beverages at least once during seven days. In 95% of cases, drugs were routinely mixed in the food or beverages. The practice was documented in patients' records in 40% (96/241) of cases. The covert administration of drugs was more often documented when the physician took the decision to hide the drugs in the patient's foodstuff (57%; 27/47) than when the person who made the decision was unknown or not recorded (23%; 7/30). Patients who got drugs covertly more often received antiepileptics, antipsychotics, and anxiolytics compared with patients who were given their drugs openly.

Conclusions The covert administration of drugs is common in Norwegian nursing homes. Routines for such practice are arbitrary, and the practice is poorly documented in the patients' records.

Introduction

Several studies have described the use of drugs, including psychotropic agents, in the care of elderly people.^1-5 In situations in which psychotropic drugs are prescribed to sedate and control patients, the practice is often called "chemical restraint."^6-8 Although the use of psychotropic drugs has been said to erode an elderly person's autonomy and decision making skills by means of sedation,⁸ covert administration of drugs has been little studied. We found only a few scientific papers that report the practice of covert administration. Treloar et al reported that 71% of residential, nursing, and inpatient units in southeast England at least sometimes administered drugs covertly in food and beverages.⁹ However, the paper did not report how many residents received drugs in this way. This paper caused some debate in Britain about the ethical aspects of covert administration.^10-12 An earlier Norwegian questionnaire study reported that 46% of the wards offering residential care for elderly patients sometimes hid drugs in the patients' food or beverages.¹³

In Norway the municipalities are responsible for nursing home care. No legislation allows that drugs can be concealed in the patients' food. The aim of this study was to describe the characteristics of patients and wards relating to the practice of mixing drugs in patients' food or beverages, to explore the reasons for such a practice, to find out who decided that such an action should be taken, and to examine how this practice was documented in the patients' records.

Methods

We carried out structured interviews with the professional carers of a random sample of 1501 patients in regular nursing homes in 54 municipalities, from all five health regions in Norway. Of these patients, 1057 lived in 142 regular units and 444 lived in 79 special care units for people with dementia. We also included 425 patients from five teaching nursing homes, of whom 305 lived in 18 regular units and 120 lived in 11 special care units. This gave a total of 1926 patients. For each patient, we assessed degree of dementia, performance in the activities of daily living, and behavioural disturbance. We recorded ward characteristics such as size, staffing, and type of ward.

Covert administration of drugs
If any drugs had been concealed in the food or beverages during the previous seven days without the patient's knowledge or consent, we recorded it. If the interviewee stated that the patient had received covert drugs, we recorded whose decision it was to give them this way, the reason for the concealment, and whether the drugs were covert in food or beverages every time the patient received drugs (as a routine) or only in exceptional cases. We also asked whether covert administration was documented in the patient's records. We recorded the drugs given and grouped them according to the Anatomical Therapeutic Chemical Classification (ATC-code).

Patients' and ward characteristics
We used a standardised interview, including rating scales, to ask the professional carer about the patient's function. We then calculated degree of cognitive impairment, function in activities of daily living, and behavioural disturbances. See bmj.com for descriptions of the rating scales used.

We defined wards with up to 12 beds as small and those with more than 12 beds as large. We calculated ward staffing ratios and grouped wards into those above and below the median staffing ratio.

Statistics
For the descriptive statistics we used SPSS version 12.02. We constructed a multilevel model for the regression analysis by using MLwiN version 2.0.¹⁴

Results

Drugs were given covertly to 94 (17%; 95% confidence interval 14% to 20%) patients in special care units and to 149 (11%; 9% to 13%) of the patients in regular units. The 1873 patients who used drugs received a mean of 5.1 (range 1-20; SD 2.6) different drugs. Patients who received drugs openly used significantly more drugs (mean 5.2; SD 2.6) than did those who got the drugs covertly in food or beverages (mean 4.4; SD 2.2; P value for difference < 0.001). For 95% (226; 4 missing) of the patients, drugs were routinely mixed in food and beverages. Patients who got drugs covertly more often received antiepileptics, antipsychotics, and anxiolytics (see bmj.com).

Table 1 shows who decided that drugs should be given covertly and how often the practice was documented. In 54% (119) of the cases, non-compliance was the reason given for administering drugs covertly. Non-compliance means that the patient has refused to take drug or has spat it out. The next most common reason was a problem with swallowing (28%; 62), followed by "to perform the necessary treatment" (10%; 22). We lack data on reason for the disguise of drugs in 22 cases.

View this table: [in this window] [in a new window]   Table 1 People who made decision to conceal drugs in food or beverages and proportion of cases documented in records. Values are numbers (percentages)

 

To find possible explanatory factors for the practice of hiding drugs in patients' food or beverages we did a bivariate logistic regression analysis using patient and ward characteristics as independent variables (table 2). We then entered the variables stepwise into a multiple logistic regression model, entering the variables with lowest P values first. Only variables that showed a significant adjusted odds ratio or had a significant influence on the other variables were kept in the model. As shown in table 2, patient characteristics such as degree of dementia, aggression, and low function in activities of daily living were the strongest explanatory factors for covert administration. Furthermore, patients in special care units had a higher risk of being given drugs covertly. The risk was lower for patients living in teaching nursing homes or in wards with a relatively high staff:patient ratio.

View this table: [in this window] [in a new window]   Table 2 Explanatory variables for use of covert administration of drugs

 

Discussion

This is the first study to report the frequency of covert drug administration in nursing homes at the level of the patient. The low rate of documentation of the covert administration of drugs makes the practice difficult to discover and indicates that it might be under-reported when studies are done with the patients' records as the source for data collection. When the physician who prescribed the drugs also took the decision that drugs should be mixed in food or beverages, the documentation rate was higher than when someone else took that decision. This may indicate that cases in which the decision is taken for medical reasons are more likely to be documented and that the "worst" cases, in which no medical reason exists, are hidden from inspection. Treloar et al reported similar results.⁹ They found that the doctor was involved in the decision to give drugs covertly in 10 out of 34 homes, and in only 11 homes had the practice of covert administration been documented. The paper concluded that even if, as most of the carers and some of the authorities believe, covert administration can be justified, the poor recording and secrecy surrounding the practice in institutions are a cause for concern. We wholeheartedly agree.

Type of ward
Table 2 shows that teaching nursing homes and a high staffing ratio are associated with the lower use of the practice of mixing drugs in the patients' food or beverages. The reason is probably that teaching nursing homes offer educational programmes to the staff in order to improve the quality of care. Wards with a higher staff ratio may also have the opportunity (time) to run educational programmes for the staff. We had expected that fewer patients in special care units than in regular units would have been subjected to covert administration, because the staff in a special care unit are usually more highly trained and aware of the patients' needs, but the reverse was true. The most likely explanation is that the proportion of patients with a severe degree of dementia and behavioural problems is extremely high in special care units. Hiding the sedative drugs in food and beverages may in many cases be the only way of administering the drugs, because of the non-cooperation of patients who may lack the capacity to understand and give consent to drug treatment.

What is already known on this topic The practice of covert drug administration in food and beverages is well known in residential and nursing homes, but no prevalence rates exist No information is available on which patients are particularly subjected to covert administration or on the procedures for documenting the practice What this study adds In Norway, 11% of patients in regular nursing home units and 17% of patients in special care units for dementia were covertly administered drugs at least once, and in 95% the practice was routine Patients with severe cognitive impairment, reduced function in activities of daily living, or aggressive behaviour were more often subjected to covert administration The practice of covert drug administration was poorly documented in the patients' records

Who takes the decision?
We are concerned that the physician responsible for medical treatment in nursing homes is not involved in all cases in which it is decided to give drugs covertly. We believe that such involvement would reduce the frequency of the practice, or at least that the practice would be better documented. A Swedish study showed that the quality assurance of drug administration was positively associated with the quality of the communication between the physician and the nurses, and was higher in nursing homes where discussions about drug treatment took place in the multidisciplinary team.¹⁵ Nygaard et al have reported that in nursing homes with a full time physician the use of antipsychotic drugs is lower than in nursing homes where a physician works part time.¹⁶ Even though these two studies did not include covert administration, the importance of an interested physician, cooperating with other health personnel in the nursing home to reduce the use of covert administration, might be substantial.

Conclusion
The practice of mixing drugs in patients' food and beverages is common in Norwegian nursing homes but is poorly documented in the patients' records. The procedure for the decision to hide drugs seems to be arbitrary.

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This is the abridged version of an article that was posted on bmj.com on 23 November 2004: http://bmj.com/cgi/doi/10.1136/bmj.38268.579097.55

Contributors: See bmj.com Funding: The research is supported by grants from the Norwegian Ministry of Health and Social Affairs (project number 16124); the Norwegian Foundation for Health and Rehabilitation through the Norwegian Health Association (project number 2001/2/0077); the Lions Club Norway; and the Norwegian Centre for Dementia Research.

Competing interests: None declared.

Ethical approval: The Regional Committee for Medical Research, the Data Inspectorate, and Department of Health approved the study.

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(Accepted 22 September 2004)

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