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PHYS THER
Vol. 79, No. 3, March 1999, pp. 286-295
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Research Reports

Back Care Instructions in Physical Therapy: A Trend Analysis of Individualized Back Care Programs

Jan J Kerssens, Emmy M Sluijs, Peter FM Verhaak, Hanneke JJ Knibbe and Irma MJ Hermans

JJ Kerssens, PhD, is Research Associate, Netherlands Institute of Primary Health Care, Utrecht, the Netherlands.
EM Sluijs, PhD, is Research Associate, Netherlands Institute of Primary Health Care
PFM Verhaak, PhD, is Senior Research Associate, Netherlands Institute of Primary Health Care
HJJ Knibbe, PT, is Research Associate, Netherlands Institute of Primary Health Care
IMJ Hermans is Research Assistant, Netherlands Institute of Primary Health Care

Address all correspondence to Dr Kerssens at NIVEL, PO Box 1568, 3500 BN Utrecht, the Netherlands (j.kerssens{at}nivel.nl)


Submitted December 9, 1998; Accepted November 4, 1998


   Abstract
 
Background and Purpose. The treatment of people with low back pain often includes giving a variety of instructions about back care. The objective of our study was to explore the content and sequence of these instructions. Subjects. Our database contained information on 1,151 therapy sessions for 132 patients who were treated by 21 therapists. Methods. Hierarchical linear modeling was used to establish trends in instructions during the course of treatment. Instructions were measured by means of a registration form. Results. Pain management instructions were given at the start of treatment and then decreased in later sessions. Instructions about taking care of the back in daily activities followed the same course. Exercise instructions were introduced after the start of treatment and were spread evenly across the visits. The number of recommendations about general fitness decreased during treatment. Conclusion and Discussion. The majority of back care instructions were spread evenly across therapy visits. Relatively little variation in instructions among patients was seen, which may indicate a lack of individualization of the back care programs.

Key Words: Back pain • Hierarchical linear models • Patient education • Physical therapy


   Introduction
Top
 Abstract
 Introduction
Theoretical Framework
 Method
 Results
 Discussion and Conclusions
 References
 
Back pain is one of the major health problems in Western industrialized countries.1 The annual incidence has been reported to be about 5%.2 Back pain is also one of the most frequent reasons for visiting a general practitioner or a physical therapist.3–6 In the Netherlands, 22% of the patients referred by general pactitioners for physical therapy have back pain.7 In the United States, patients with low back pain represent 25% of all outpatient discharges from physical therapy practices.8 The primary physical therapy intervention in the treatment of people with back pain is often exercise9,10 aimed at obtaining recovery with a minimal chance of relapse.11 Another therapeutic method is to educate patients about anatomy, the natural history of disorders of the back, the principles underlying posture, back care during daily activities, and a healthy lifestyle.12 Consequently, the effects of back care programs may depend on the patient's adherence to the therapist's instructions.13 Adherence, however, may be difficult to obtain.13–17 To facilitate treatment adherence, some authors recommend setting attainable goals in cooperation with the patient.18 A manageable number of instructions, spread out in a logical sequence, seems like a practical strategy for patient education.19 Thus, back care instructions require a careful planning. Knowledge of the content and sequence of back care instructions is needed to plan an educational program.

Thus, the first objective of our study was to investigate the content and sequence of back care instructions given by physical therapists. Although our study involved physical therapists in the Netherlands, its scope was much wider. We believe that not only do the Netherlands and the United States have comparable clinical guidelines for patients with low back pain20,21 but therapists from both countries use the same categories of patient education.22,23

Our second objective was to explore similarities and differences among physical therapists. Research has shown considerable differences among physical therapists in the amount of information given to patients.24 Comparable results have been reported for general practitioners25 and nurses.26 To enhance the quality of care, efforts have been undertaken by governmental agencies and professional associations to diminish treatment differences among physical therapists. Professional organizations are developing guidelines for practice that contain, for example, the optimal treatment for low back symptoms.27,28 A clinical guideline regarding acute low back problems in adults21 emphasizes patient education as one of the few moderately evidence-based interventions for people with low back pain. Connolly29 commented that the guideline developed by the Agency for Health Care Policy and Research "emphasized telling patients what to do rather than training patients how to do" and that the guideline lacks items regarding exercise prescription and instruction in symptom control.

We believe that education should be tailored to the patient's needs and attuned to his or her individual situation.14 Therefore, we examined the relative influence of patients and therapists on the number and content of instructions because we assumed that optimal care is reflected in more variability related to patients and in less variability related to therapists. This assumption is not to say that all therapists should act uniformly, but rather it emphasizes the importance of variability (ie, tailoring the educational experience) among different patients with the same therapist, because each patient may have different needs at different times during treatment. An individual tailoring of patient education to these different needs will become manifest in larger patient variability.


   Theoretical Framework
Top
 Abstract
 Introduction
 Theoretical Framework
Method
 Results
 Discussion and Conclusions
 References
 
In general, physical therapy for back problems, in our opinion, has 3 main objectives: pain relief, recovery of function, and prevention of recurrence. These objectives constitute a basis for palliative, curative, and preventive interventions and instructions.

During the pain management phase, back care instructions may concern applying warmth, taking rest, use of pain medication, and so on. Some authors30 consider pain management to be preparatory for the primary intervention: exercise.30 Pain management instructions refer to the acute complaints. Patients are rewarded immediately for their adherence, and the correct execution of these instructions is under control of the therapist. Exercise therapy concerns the mobility of the lumbar spine, strengthening important muscle groups, and so on. By means of exercise instructions, patients learn to master the exercises. Again, these instructions are under control of the therapist, as he or she can assess the patient's adherence at the next visit. Patients receive many instructions about taking care of their back (ie, about lifting, posture, locomotion, and so on). During the course of treatment, additional attention may be given to instructions about future management of back problems. Here, the reward for the patient may be less immediate, and it is important to repeat these kinds of instructions throughout the entire series of therapy sessions. To prevent the recurrence of back problems, patients are also often given advice about general fitness and health behaviors.31 Here, the patient is in charge and responsible for the long-term nonsupervised adherence.14

Given these considerations, we postulate the following optimal sequence of back care instructions:

  1. Pain management instructions are given most often at the start of treatment and then gradually decrease in number.
  2. Exercise instructions are introduced after the start of treatment and then repeated throughout the rest of the treatment.
  3. Instructions about taking care of the back during activities of daily living are given throughout the course of treatment.
  4. Recommendations about general fitness are mainly given toward the end of treatment, so they they gradually increase in number.


   Method
Top
 Abstract
 Introduction
 Theoretical Framework
 Method
Results
 Discussion and Conclusions
 References
 
Patients

In the Netherlands, the majority of all patients visit small, private outpatient practices.32 Most of the patients are treated in a series of sessions that last almost a half hour each.33,34 Our database contained information on 1,151 therapy sessions for 132 patients with back pain who were treated by 21 physical therapists. The study was conducted in private outpatient practice. The average number of therapy sessions was 8.5 per patient (range=1–22), and the average number of patients was 6 patients per physical therapist (range=2–12). Data on the average age and sex of the patients are displayed in Table 1, which also contains information on the treatment goals.


View this table:
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[in a new window] 		Table 1. Description of Patients (N5132) and Treatments

 
Seven different treatment goals were identified. Treatment was most often aimed at increasing lumbar spine range of motion and pain reduction (Tab. 1). The average treatment had 3 goals.

Physical therapists also estimated on 4-point scales the likelihood of recurrence within a year (complaint will certainly not/probably not/probably/certainly recur), the influence of psychosocial aspects (psychosocial aspects have no/some/much/very much influence), and the importance of doing exercises in the prevention of back pain recurrence (exercises are not important/somewhat important/important/very important to prevent recurrence).

Registration Form

The physical therapists recorded the kind of instructions given to their patients in each session by means of a registration form. In physical therapy, registration forms can be a reliable source of information.35,36 The form contained 34 topics in 4 areas: instructions about pain management (8 topics), instructions about taking care of the back when performing daily activities (14 topics), instructions about doing exercises (9 topics), and recommendations on general fitness (3 topics) (Tab. 2). The registration form had 10 additional items that could be used freely by the therapist. The list was developed in 2 stages. First, all available information used in practice by physical therapists was explored. All kinds of unofficially published brochures and leaflets were investigated, supplemented by an overview of 70 back school programs by Knibbe et al37 and by a book edited by Goëken38 that contains descriptions of back management programs. From these sources, a list was compiled of all kinds of advice given to patients with back pain. We checked this list for completeness and condensed it into major categories. Second, this list was pilot tested by 4 experienced physical therapists to determine whether use of the form could be part of their daily routine.


View this table:
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[in a new window] 		Table 2. Number and Percentages of Sessions of Information (1,151 Sessions, 132 Patients, 21 Physical Therapists)

 
Data Analysis

We analyzed the data by means of a special form of linear regression analysis: hierarchical linear modeling (HLM).39,40 We used HLM to analyze the data for 2 reasons: (1) because the number of instructions is measured repeatedly during sessions41 and (2) because we had a 2-stage sample of patients within physical therapist.42 Thus, we had information about sessions, patients, and physical therapists. The data, therefore, were not from independent observations, violating a major assumption of traditional linear regression analysis.43 In HLM, both of these factors are taken into account. Several health services research projects have applied HLM.44–47 Data analysis was carried out by means of MLN software.48

We used HLM in 5 separate analyses to determine which factors were statistically significant predictors of the number of overall instruction statements as well as the number of statements in the areas of pain management, back care during activities of daily living, exercises, and fitness. Several classes of predictors were used. These classes of predictors included variables related to the progression of sessions (overall trend, first session, last session), patient characteristics (age and sex), treatment goals (range of motion, pain reduction, posture improvement, muscle strengthening, facilitation of activities of daily living, muscle tone regulation, and education in body mechanics), and therapist opinion about the case (the likelihood of recurrence within a year, the influence of psychosocial aspects, and the importance of doing exercises in the prevention of back pain recurrence).

Regression coefficients and their standard errors are used to test for statistical significance. If their division is greater than 1.96 or smaller than –1.96, the coefficient is statistically significant (alpha=.05), as in normal linear regression analysis. The proportion of the total variability that could be accounted for by variance between therapists, patients, and sessions was calculated for each analysis.


   Results
Top
 Abstract
 Introduction
 Theoretical Framework
 Method
 Results
Discussion and Conclusions
 References
 
Back Care Instructions

As outlined in Table 2, a total of 6,078 instructions were given to 132 patients over 1,151 sessions. The mean number of instructions was 5.3 per session and 46 per patient. These were not all different kinds of instructions. Information was often repeated in subsequent sessions. On average, patients received 16 different instructions, so instructions were repeated an average of 3 times. Of the total of 6,078 instructions, 885 instructions concerned pain management. Resting to avoid pain (23.3% of the sessions) and doing analgesic exercises (19.4% of the sessions) were most common types of instructions in this area. Taking care of the back while performing daily activities was the focus of 2,379 instructions. Instructions on sitting posture (29.2% of the sessions) and standing posture (25.4% of the sessions) were most frequently encountered in this area. Information on how to avoid overloading the back (20.1% of the sessions) and how to alternate body position during daily activities (24.6% of the sessions) also was often given. Home exercises were the focus of 2,234 instructions. Exercises to increase the mobility of the lumbar spine were advocated most often (48.6% of the sessions). Exercises to strengthen the abdominal muscles (27.5% of the sessions) and the back muscles (22.0% of the sessions) also were often discussed. Information about physical fitness was less common, with 444 recommendations related to this topic area.

Instructions Throughout Treatment Sessions

Figure 1 displays graphically the number of instructions during the different sessions. The first session of the treatment contained the most items of information. The last session of the treatment is hidden in this figure, as this may have been the 6th session in one treatment and the 18th session in another treatment.


Figure 1
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[in this window]
[in a new window] 		Figure 1. Mean number of instructions given in sessions 1 through 18.

 
During the subsequent sessions, the number of topics discussed decreased. In the 16th session, for instance, an average of about 3 topics were discussed. Some topics showed a sharper decline than other topics. Pain management, for instance, was discussed relatively often in the initial sessions and relatively rarely in the later sessions. The same was true for back care instructions in daily activities, although the decrease was less sharp and more irregular. Information about home exercises seemed to be more stable throughout the sessions.

Trend Analysis

A trend analysis demonstrated these results more precisely and took the possible confounding variables into consideration. Overall, there was a negative trend related to instructions in therapy (Tab. 3), indicating that the frequency of instructions declined as the sessions progressed. There was, however, a positive coefficient related to both the first session and the last session, indicating that more than typical instructions were given during the first and last sessions. The only other variable that predicted the total number of instructions was the therapist's opinion on the importance of exercise in prevention, indicating that a greater belief in the importance of exercise was reflected in higher numbers of instructions to patients. All of these findings were statistically significant. With respect to the sources of variance within the analysis, 55% of the variability was related to differences among sessions, 34% was related to differences among therapists, and only 11% was related to differences among patients.


View this table:
[in this window]
[in a new window] 		Table 3. Regression Coefficients and Standard Errors (in Parentheses) of Trend Analysis (1,151 Sessions, 132 Patients, and 21 Physical Therapists)

 
Based on the results shown in Table 3, an individual trend line was calculated for each patient (Fig. 2, upper panel). Patients given many instructions at the start of treatment showed a sharp decrease in the number of instructions received throughout the sessions. They ended up the same as patients with only a modest number of topics discussed in the first session. The trend lines of all patients with long treatments, no matter how they started, converge into the same small number of instructions. The same procedure for the 21 individual therapists resulted in a slightly different picture (Fig. 2, lower panel). At the level of the physical therapist, the lines are more entangled. One therapist began, on average, with little information and ended up with more information; most of the other therapists did the opposite.


Figure 2
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[in this window]
[in a new window] 		Figure 2. Upper panel: Individual trend lines of mean numbers of instructions given for 132 patients. Lower panel: Individual trend lines of mean number of instructions given for 21 physical therapists.

 
Trends of Different Kinds of Instructions

The trend analysis, with the total number of instructions, is an introduction to the estimation of another series of trends for each of the 4 distinctive kinds of instructions mentioned in the theoretical framework: instructions on pain management, instructions on back care in activities of daily living, instructions on exercise, and recommendations for general fitness. The number of instructions differed greatly among the 4 areas (Tab. 2). To overcome this problem of scale, the dependent variables were standardized to z scores before modeling the independent variables. This procedure allowed us to better compare the results of the trend analyses summarized in Table 4.


View this table:
[in this window]
[in a new window] 		Table 4. Regression Coefficients and Standard Errors (in Parentheses) of Trend Analyses for Pain Management, Back Care in Activities of Daily Living, Exercises, and Fitness (1,151 Sessions, 132 Patients, and 21 Physical Therapists)a

 
The trend coefficient for the number of pain management instructions was –.06 (Tab. 4). There was a downward trend throughout the sessions. The largest coefficient (.98) occurred in the first session for pain management, which reflects the fact that the topic of pain management was discussed very often in the first session. At the patient level, a small effect of age and a larger effect of "psychosocial factors" was estimated. The latter finding means that when patient complaints were related to psychosocial factors, according to the physical therapist, instructions on pain management were discussed more often than would occur with other patients.

The trend effect for instructions on back care in activities of daily living was of the same magnitude as the pain management coefficient (Tab. 4). There was a trend effect for both first and last sessions. At the patient level, we found an effect of 2 treatment goals. In those situations where the therapist was aiming at posture improvement or muscle tone regulation, back care instructions were more common. This finding also applies to patients whose exercises were seen as important in the prevention of relapse.

Table 4 also shows the results of the trend analysis with the number of exercise instructions as a dependent variable. The trend coefficient was not statistically significant. This finding means that the amount of home exercise information was spread evenly across the sessions, except for the beginning and the end of treatment where the first and last sessions had significant effects. Thus, from the first session to the second session, the mean number of exercise instructions increased (.32) and stayed at that level during subsequent sessions, until the last session where it increased (.21) again. The physical therapist's estimation of the importance of home exercises in preventing the recurrence of back pain was also associated with the amount of information given on home exercise.

Recommendations to promote general fitness were the last of the instructions analyzed (Tab. 4). The trend coefficient was small, but negative, and there was neither a first-session trend effect nor a last-session trend effect. In treatments explicitly targeting pain reduction, fewer recommendations about general fitness were registered.

With respect to the sources of variance within the analysis, most of the variability in the number of instructions was related to differences among sessions, a smaller part was related to differences among therapists, and an even smaller part was related to differences among patients. These findings applied to all 4 areas of instruction.


   Discussion and Conclusions
Top
 Abstract
 Introduction
 Theoretical Framework
 Method
 Results
 Discussion and Conclusions
References
 
We explored the content and sequence of instructions given by 21 physical therapists in private outpatient practices in the Netherlands. The treatment for back pain constitutes a great challenge for secondary prevention. Consequently, we expected much information to deal with home exercises and back care instructions. Most of the topics discussed related to these areas. The actual number of instructions, however, was difficult to interpret. Earlier studies have focused on the number of informative statements obtained by analyzing audiotaped sessions. Sluijs49,50 reported about 20 educational remarks and Gahimer and Domholdt23,51 mentioned about 12 educational remarks, whereas the number of instructions averaged about 6 in our study. We should point to an important difference between the 2 studies mentioned and our study. In the previous studies,23,49–51 the authors counted each occurrence, whereas we had an aggregate score for each session where each kind of instruction could count only once. Another difference between the previous studies and ours concerns the difference between observational studies and the use of registration forms. Comparison of these 2 methods invariably shows that registration forms underestimate the amount of information given.52,53 The different method used in our study makes a comparison with other studies quite difficult.

From a consideration of the course of physical therapy, we arrived at 4 assumptions about the particular sequence of the instructions in back care programs. Two of the assumptions were confirmed, and 2 assumptions were rejected.

Pain management instructions were given at the start of treatment and then decreased in number, as we anticipated. Evidently, pain prevails in the first phase of treatment of the majority of patients; therefore, pain management is apparently seen as vital in this step. The number of pain management instructions seems to follow the usual course of recovery.

As we expected, exercise instructions were introduced after the start of treatment and were spread evenly across the visits. In an earlier study,49 a sharp decrease in exercise instructions across the therapy visits was found, with a maximum number of instructions in the second session and only a few instructions at the end. In our opinion, practicing therapists are nowadays probably guided more by patient education principles as far as exercise therapy is concerned.

Instructions about taking care of the back during daily activities followed a different course from our expectations. Back care instructions were not evenly distributed over the sessions. The trend was downward. In the last session, there were relatively more back care instructions, probably because the therapist wanted to recapitulate the main items of self-management. The fact that back care instructions were predominant in the first stage of treatment and received less attention in the second half of treatment (except for the last session) does not meet our recommendation to spread the information equally across the visits. It could be argued, however, that instructions for activities of daily living may be provided with more efficacy in the early stages of treatment, when motivation to change behavior may be high. Currently, no evidence-based recommendation can be given.

Physical therapists apparently can influence a patient's health status, not only by prescribing efficacious treatments for musculoskeletal dysfunctions, but also by making recommendations for regular exercise to promote overall fitness.54–56 In contrast to our assumptions, the number of recommendations about general fitness decreased over the course of treatment, and information about physical fitness was not widely given when compared with the other areas.

Assumptions about a rational sequence of back care instructions were derived from the usual course of physical therapy. We do not pretend that our supposition about the sequence of instructions is perfect. It would seem that it is important to find out what the optimal sequence is in order to enable the physical therapist to plan the information properly and to increase the likelihood of adherence because a well-planned intervention ensures the best adherence. We recommend that future guidelines for optimal treatment of patients with back pain should contain evidence-based information about the optimal sequence of instructions.

Considering the information given by the physical therapists within the framework of guidelines,21 we conclude that physical therapists comply with the recommendation to pay attention to patient education.21 We found many differences among therapists, however, in the amount of information they provide. The largest difference was found for the instructions on taking care of the back in daily activities. Some therapists offered a lot of advice, whereas other therapists did not. This finding is in accordance with the findings of one of our earlier studies.22 Evidently, physical therapists have considerable flexibility when instructing their patients. It is unclear what degree of flexibility is desirable. Guideline developments tend to restrict the caregiver's degree of freedom. Within each guideline, however, some degree of freedom appears to be necessary to tailor the treatment to the individual patient's needs and circumstances. We expect that finding the balance between uniformity and flexibility remains a point of careful consideration in health care and, thus, also in physical therapy.

Given the diversity of the instructions given to patients, we would like to think about the intervention as an individualized back care program, that is, a program tailored to each patient's needs and attuned to the patient's individual situation. We assumed that individualized back care programs would lead to differences among patients in the information given by the physical therapist. The magnitude of the variance components shows us that this assumption is not true. The results indicate that the number of instructions in back care programs are determined to a high degree by individual therapists and not by the patient. The differences among patients were rather small. In our opinion, this finding indicates that the information and instructions were not fully tailored to each patient's situation, which is one of the strategies for enhancing patients' adherence to treatment. To enhance adherence, some authors57–59 recommend tailoring exercises and advice as much as possible, considering the patient's particular situation and routines. We believe that adherence is even better when these instructions are also integrated into each patient's daily activities to prevent adherence problems.60 We recommend, therefore, that tailoring information and instructions to the individual patient should be considered by therapists, but we cannot present data to show that it would lead to better patient outcomes.


   Footnotes
 
This work was supported by Grant No. 002822970 from the PREVENTIEFONDS (Prevention Fund).


   References
Top
 Abstract
 Introduction
 Theoretical Framework
 Method
 Results
 Discussion and Conclusions
 References
 

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E. J. Hendriks, J. J Kerssens, J. Dekker, R. M Nelson, R. A. Oostendorp, and J. van der Zee
One-Time Physical Therapist Consultation in Primary Health Care
Physical Therapy, October 1, 2003; 83(10): 918 - 931.
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