In this issue of the Scandinavian Journal of Pain Ruud Groeneweg and co-workers [1] focus on the influence of treatment outcome expectancies on the treatment effect in patients with neck pain. They also included clinical and psychosocial variables previously documented to be associated with treatment outcome. In a prospective study including 181 patients followed at 7 and 26 weeks after receiving manual therapy or physiotherapy, hierarchical logistic regression analysis documented that expectancies explained slightly less than 10% of the variance in pain and 16–17% of the variance in functioning. In contrast to several previous prospective studies in neck pain, fear avoidance beliefs did not influence outcome significantly in the present study [2,3,4,5].
1 Neck pain, fear and expectancies
Neck pain is common, and often associated with substantially reduced function [6,7]. The course of neck pain may be long lasting [8] and closely associated with psychosocial factors [9,10]. Emotional distress, anxiety and depression are classic psychological factors influencing the prognosis of neck pain [11,12]. However, also beliefs and expectancies are assumed to influence the prognosis of painful conditions [5,13]. Fear avoidance beliefs are documented in numerous studies to act as mediator and moderator of pain [3,4,5]. Yet, another dimension of psychology is expectations and credibility, i.e. thoughts and feelings about treatment and outcome. Although, to some extent explored in relation to placebo and nocebo effects, expectations are, as Ruud Groeneweg et al. [1] point out, seldom included together with the more classical psychosocial factors in the spinal pain literature. Hence, expectancies outweighing fear avoidance beliefs in the present study is an important finding and needs to be pursued in future studies as well.
2 Challenges in expectation research
There are yet several challenges to be resolved within this area of research. One may assume that expectations are individual and heterogeneous. Hence, expectations are likely to be related to a particular population. Socioeconomic background [14], previous health experiences [15], personality and emotional distress [16] may affect expectations. Furthermore, the expectations may be related to the particular complaint or diagnosis, to the subsequent treatment [17] or to the prognosis and outcome [18]. In the present study by Groeneweg et al. [1], the patients consented to participate in a randomized treatment trial which may be an explanation for their high level of expectations. In contrast, Skatteboe et al. [19] found that among a mixed population referred to a specialized outpatient clinic, only one third of the patients expected changes in their condition. In addition, even though the pain level was rather high and two thirds of the patients had multiple pain sites, their disability as evaluated by Neck Disability Index was relatively low in the present study compared to other studies [20,21]. In addition, the way we measure credibility and expectation may influence the results. Using a properly translated and validated instrument like the Credibility Expectancy Questionnaire (CEQ) is a strength in the present study. However the questions in CEQ are closely related to the treatment. Several other measurements exist [22], which may capture different dimensions of expectancies and influence the diverging results. However, the systematic review by Mondloch et al. [13], supports the results by Groeneweg et al. [1], and documents that positive treatment expectations were associated with improved health outcomes in 15 of 16 studies.
3 Clinical utility of expectations
The article by Groeneweg et al. [1], supports the need of better assessment of patients expectations in the clinical setting. However, it is worth to note that unrealistic expectations, whether high or low, are suggested to negatively influence outcomes [23]. Hence, moving to clinical utilizations of expectations, we may need to adjust the expectations to the documented effect of the treatment and prognosis. Health care professionals seem to have the possibility to do so [24] and such adjustments have in itself been shown to improve outcome [25]. In conclusion, the assessment and discussion of expectations in the clinical consultations is a cheap and viable direction to improve communication and care of patients with painful musculoskeletal conditions.
DOI of refers to article: http://dx.doi.org/10.1016/j.sjpain.2016.10.003.
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Conflict of interest: None declared.
References
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© 2016 Scandinavian Association for the Study of Pain
Articles in the same Issue
- Scandinavian Journal of Pain
- Editorial comment
- Patients with chronic neck-pain after trauma do not differ in type of symptoms and signs, but suffer more than patients with chronic neck pain without a traumatic onset
- Observational study
- Chronic neck pain patients with traumatic or non-traumatic onset: Differences in characteristics. A cross-sectional study
- Editorial Comment
- Re-enforcing therapeutic effect by positive expectations of pain-relief from our interventions
- Original experimental
- Effect of expectation on pain assessment of lower- and higher-intensity stimuli
- Editorial comment
- Objective methods for the assessment of the spinal and supraspinal effects of opioids
- Topical review
- Objective methods for the assessment of the spinal and supraspinal effects of opioids
- Editorial Comment
- Multi-target treatment of bone cancer pain using synergistic combinations of pharmacological compounds in experimental animals
- Original experimental
- Synergistic combinations of the dual enkephalinase inhibitor PL265 given orally with various analgesic compounds acting on different targets, in a murine model of cancer-induced bone pain
- Editorial comment
- Terminal cancer pain intractable by conventional pain management can be effectively relieved by intrathecal administration of a local anaesthetic plus an opioid and an alfa2-agonist into the cerebro-spinal-fluid
- Observational study
- Multimodal intrathecal analgesia in refractory cancer pain
- Editorial comment
- Treatment success in neck pain: The added predictive value of psychosocial variables in addition to clinical variables
- Observational study
- Treatment success in neck pain: The added predictive value of psychosocial variables in addition to clinical variables
- Editorial comment
- Why are some patients with chronic pain from anterior abdominal nerve entrapment syndrome (ACNES) refractory to peripheral treatment with neurectomy?
- Clinical pain research
- Treatment response and central pain processing in Anterior Cutaneous Nerve Entrapment Syndrome: An explorative study
- Editorial comment
- Gain in functions before pain reduction during intensive multidisciplinary paediatric pain rehabilitation programme
- Clinical pain research
- Physical and occupational therapy outcomes: Adolescents’ change in functional abilities using objective measures and self-report
- Editorial comment
- Complex Regional Pain Syndrome (CRPS): High risk of CRPS after trauma in another limb in patients who already have CRPS in one hand or foot: Lasting changes in neural pain modulating systems?
- Clinical pain research
- The risk of pain syndrome affecting a previously non-painful limb following trauma or surgery in patients with a history of complex regional pain syndrome
- Editorial Comment
- Positive affect could reduce the impact of pain
- Original experimental
- The buffering role of positive affect on the association between pain intensity and pain related outcomes
- Editorial comment
- The meaning and consequences of amputation and mastectomy from the perspective of pain and suffering – Lessons to be learned and relearned
- Clinical pain research
- The meaning and consequences of amputation and mastectomy from the perspective of pain and suffering
- Editorial comment
- Invasive intervention for “intractable” Complex Regional Pain Syndromes (CRPS)?
- Educational case report
- Intrathecal management of complex regional pain syndrome: A case report and literature
- Observational study
- Item response theory analysis of the Pain Self-Efficacy Questionnaire
- Announcement
- Scandinavian Association for the Study of Pain (SASP): Annual Meeting 2017
Articles in the same Issue
- Scandinavian Journal of Pain
- Editorial comment
- Patients with chronic neck-pain after trauma do not differ in type of symptoms and signs, but suffer more than patients with chronic neck pain without a traumatic onset
- Observational study
- Chronic neck pain patients with traumatic or non-traumatic onset: Differences in characteristics. A cross-sectional study
- Editorial Comment
- Re-enforcing therapeutic effect by positive expectations of pain-relief from our interventions
- Original experimental
- Effect of expectation on pain assessment of lower- and higher-intensity stimuli
- Editorial comment
- Objective methods for the assessment of the spinal and supraspinal effects of opioids
- Topical review
- Objective methods for the assessment of the spinal and supraspinal effects of opioids
- Editorial Comment
- Multi-target treatment of bone cancer pain using synergistic combinations of pharmacological compounds in experimental animals
- Original experimental
- Synergistic combinations of the dual enkephalinase inhibitor PL265 given orally with various analgesic compounds acting on different targets, in a murine model of cancer-induced bone pain
- Editorial comment
- Terminal cancer pain intractable by conventional pain management can be effectively relieved by intrathecal administration of a local anaesthetic plus an opioid and an alfa2-agonist into the cerebro-spinal-fluid
- Observational study
- Multimodal intrathecal analgesia in refractory cancer pain
- Editorial comment
- Treatment success in neck pain: The added predictive value of psychosocial variables in addition to clinical variables
- Observational study
- Treatment success in neck pain: The added predictive value of psychosocial variables in addition to clinical variables
- Editorial comment
- Why are some patients with chronic pain from anterior abdominal nerve entrapment syndrome (ACNES) refractory to peripheral treatment with neurectomy?
- Clinical pain research
- Treatment response and central pain processing in Anterior Cutaneous Nerve Entrapment Syndrome: An explorative study
- Editorial comment
- Gain in functions before pain reduction during intensive multidisciplinary paediatric pain rehabilitation programme
- Clinical pain research
- Physical and occupational therapy outcomes: Adolescents’ change in functional abilities using objective measures and self-report
- Editorial comment
- Complex Regional Pain Syndrome (CRPS): High risk of CRPS after trauma in another limb in patients who already have CRPS in one hand or foot: Lasting changes in neural pain modulating systems?
- Clinical pain research
- The risk of pain syndrome affecting a previously non-painful limb following trauma or surgery in patients with a history of complex regional pain syndrome
- Editorial Comment
- Positive affect could reduce the impact of pain
- Original experimental
- The buffering role of positive affect on the association between pain intensity and pain related outcomes
- Editorial comment
- The meaning and consequences of amputation and mastectomy from the perspective of pain and suffering – Lessons to be learned and relearned
- Clinical pain research
- The meaning and consequences of amputation and mastectomy from the perspective of pain and suffering
- Editorial comment
- Invasive intervention for “intractable” Complex Regional Pain Syndromes (CRPS)?
- Educational case report
- Intrathecal management of complex regional pain syndrome: A case report and literature
- Observational study
- Item response theory analysis of the Pain Self-Efficacy Questionnaire
- Announcement
- Scandinavian Association for the Study of Pain (SASP): Annual Meeting 2017