Sex differences in pain

A meta-ethnography of patients' experiences of chronic pelvic pain: struggling to construct chronic pelvic pain as 'real'

AIM

To review systematically and integrate the findings of qualitative research to increase our understanding of patients' experiences of chronic pelvic pain.

BACKGROUND

Chronic pelvic pain is a prevalent pain condition with a high disease burden for men and women. Its multifactorial nature makes it challenging for clinicians and patients.

DESIGN

Synthesis of qualitative research using meta-ethnography.

DATA SOURCES

Five electronic bibliographic databases from inception until March 2014 supplemented by citation tracking. Of 488 papers retrieved, 32 met the review aim.

REVIEW METHODS

Central to meta-ethnography is identifying 'concepts' and developing a conceptual model through constant comparison. Concepts are the primary data of meta-ethnography. Two team members read each paper to identify and collaboratively describe the concepts. We next compared concepts across studies and organized them into categories with shared meaning. Finally, we developed a conceptual model, or line of argument, to explain the conceptual categories.

RESULTS

Our findings incorporate the following categories into a conceptual model: relentless and overwhelming pain; threat to self; unpredictability, struggle to construct pain as normal or pathological; a culture of secrecy; validation by diagnosis; ambiguous experience of health care; elevation of experiential knowledge and embodiment of knowledge through a community.

CONCLUSION

The innovation of our model is to demonstrate, for the first time, the central struggle to construct 'pathological' vs. 'normal' chronic pelvic pain, a struggle that is exacerbated by a culture of secrecy. More research is needed to explore men's experience and to compare this with women's experience.

Pain in older adults: A prevalence study in the Mediterranean region of Catalonia

Although information is available about the prevalence of pain in older adults in Anglo-Saxon and Scandinavian countries, very little is known about older adults in other parts of the world. This study reports the prevalence of pain in a randomly selected sample of older adults living in the Mediterranean region of Catalonia. Besides studying the existence of pain at the time of interview, the authors investigated several characteristics of the participants' pain experience: pain onset, number and location of pain sites, intensity of pain, number of days in pain, severity of pain, the extent to which pain interfered with daily life, and expressed needs in relation to pain. A cross-sectional survey was conducted of adults aged 65 years and over living in Catalonia. A total of 592 individuals participated in the study, and data was collected through personal interviews with participants. The prevalence of any pain was 73.5%, and similar across age groups but higher in females than in males. Among individuals suffering from pain, 94.2 were experiencing chronic pain (i.e., pain of three months' duration or more). The mean number of painful areas (out of 10) was 4.48. No clear pattern of the prevalence of regional pain was observed, although joints were the most frequently reported painful place. Pain interfered in the life of a considerable number of participants (35.5%), but no differences in the level of expressed needs was detected between those that were affected and those that were not. This study provides new evidence that pain is an important problem for the older adult, one that severely impacts on their health status, causing disability and reduced ability to function, particularly in older women.

Pain among the oldest old in community and institutional settings

The relationship between pain and increasing age was investigated using data from two different care settings collected on a province-wide basis in Ontario. Home care clients (HC) and complex continuing care patients (CCC) are assessed using the Resident Assessment Instrument-Home Care and Resident Assessment Instrument 2.0 instruments, respectively, as part of normal clinical practice. For this study, the sample was restricted to those aged 65 years and older and totaled 193,158 individuals. Centenarians (those 100 years of age or older) made up 0.41% (n=788) of the sample. Pain was assessed according to a previously validated pain scale embedded in both assessments that uses items on frequency and intensity. Based on 5-year age groups beginning at 65, the mean reported pain score was lower with each increment in age for men and women. Multiple logistic regression models were constructed and the odds ratios for pain in both HC and CCC groups decreased consistently in higher age groups after adjusting for disease diagnoses, cognition, functional status and health indicators. A model that included categories of analgesic medications coded based on the WHO pain ladder showed the relationship persisted after controlling for analgesia. In clinical settings, the oldest old appear to have lower levels of pain compared with the young old after adjusting for a variety of potential confounding variables.

Gender differences in health care utilization among veterans with chronic pain

BACKGROUND

Previous research reports that 48% of veterans regularly experience and express concern over pain. Outpatient service use is higher for veterans with pain than for veterans without pain. Our study objective was to identify differences in outpatient utilization between men and women veterans with chronic pain.

METHODS

We identified all men and women veterans at the Durham Veterans Affairs Medical Center in fiscal year (FY) 2002 between the ages of 21 and 60 that had two visits for the same pain location at least 6 weeks apart as determined by ICD-9 coding. Men and women were age-matched at a 2:1 ratio. We then compared the number of outpatient visits between genders in FY 2003.

RESULTS

We identified 406 female and 812 male veterans. The mean number of clinic visits for women was 25.2 (SD 30.2) and for men 17.6 (SD 24.1). After adjusting for multiple pain sites, psychiatric diagnoses, age, and comorbidities, women veterans had a 27% higher rate of outpatient visits than men (incidence rate ratio [RR] 1.27, 95% confidence [CI] 1.15 to 1.41). Specifically, women had higher rates of visits to primary care (RR 1.36, 95% CI 1.24 to 1.50), physical therapy (RR 1.67, 95% CI 1.20 to 2.33), and other clinics (RR 1.28, 95% CI 1.14 to 1.44), and had a higher rate of visits to address pain (RR 1.15, 95% CI 1.02 to 1.30) than men.

CONCLUSIONS

This is the first study to examine gender differences in chronic pain and utilization in the veteran population. Women veterans with chronic pain may need more resources to adequately manage chronic pain conditions as well as associated comorbidities and psychiatric disease.

Cancer patients’ first treatment episode with opioids: a pharmaco-epidemiological perspective

GOAL

The factors underlying the choice of opioids for cancer patients in primary care are largely unknown. Our aim was to describe cancer patients' first treatment episode with opioids in relation to disease characteristics and clinical course.

PATIENTS AND METHODS

During 1997 and 1998, a population-based cohort of 4,006 incident cancer patients from a Danish county was identified. The patients were followed up from diagnosis to death or until 31 December 2003, and data on their use of opioids were obtained from a prescription database.

MAIN RESULTS

Eventually, 54% of the cancer patients became incident users of opioids. Opioid treatment was initiated close to the diagnosis date in 20% of the patients. Most incident users (57%) were not terminal when they began using opioids, and 44% survived the first treatment episode. Of those who died, 70% received opioids in their terminal phase. The incidence rates of new opioid users were inversely related to the 5-year cancer survival period. A weak opioid was the first choice in 64% of the non-terminal users and in 43% of the terminal ones. No statistically significant differences in opioid use were found between men and women.

CONCLUSIONS

Opioid use in cancer patients was not confined to the terminal course. Treatment with opioids should be viewed as a dynamic condition, with patients shifting between periods of use and non-use. The aggressiveness of the cancer and the presence of metastases were characteristics found to be strong determinants of opioid use.