Gender differences in chronic pain--findings from a population-based study of Norwegian adults

Chronic pain, associated factors, and impact on daily life: are there differences between the sexes?

This pioneering cross-sectional study in São Luís, Maranhão State, Brazil, aimed to compare men and women with chronic pain by identifying associated factors and characterizing the pain and its impact on daily life. Considering an expected prevalence of 25%, 95% confidence interval, and 3% precision, a cluster sample of 1,597 individuals was selected. The descriptive analysis showed a predominance of women, age bracket of 18 to 29 years, and brown skin color. Prevalence of chronic pain was higher in women than in men. Risk factors were analyzed with logistic regression. Increasing age was an associated risk factor for chronic pain in both sexes. In women, 12 or more years of schooling were associated with lower prevalence of chronic pain, and divorce or widowhood was associated with higher prevalence. Lower back pain and headache were the two most frequently reported sites. There was no difference between the sexes in time since onset or intensity of pain. Chronic pain had a greater impact on daily life for women and generated more feelings of sadness.

Gender medicine: a task for the third millennium

Gender-specific medicine is the study of how diseases differ between men and women in terms of prevention, clinical signs, therapeutic approach, prognosis, psychological and social impact. It is a neglected dimension of medicine. In this review we like to point out some major issues in five enormous fields of medicine: cardiovascular diseases (CVDs), pharmacology, oncology, liver diseases and osteoporosis. CVDs have been studied in the last decades mainly in men, but they are the first cause of mortality and disability in women. Risk factors for CVD have different impacts in men and women; clinical manifestations of CVD and the influence of drugs on CVD have lot of gender differences. Sex-related differences in pharmacokinetics and pharmacodynamics are also emerging. These differences have obvious relevance to the efficacy and side effect profiles of various medications in the two sexes. This evidence should be considered for drug development as well as before starting any therapy. Gender disparity in cancer incidence, aggressiveness and prognosis has been observed for a variety of cancers and, even if partially known, is underestimated in clinical practice for the treatment of the major types of cancer. It is necessary to systematize and encode all the known data for each type of tumor on gender differences, to identify where this variable has to be considered for the purposes of the prognosis, the choice of treatment and possible toxicity. Clinical data suggest that men and women exhibit differences regarding the epidemiology and the progression of certain liver diseases, i.e., autoimmune conditions, genetic hemochromatosis, non-alcoholic steatohepatitis and chronic hepatitis C. Numerous hypotheses have been formulated to justify this sex imbalance including sex hormones, reproductive and genetic factors. Nevertheless, none of these hypothesis has thus far gathered enough convincing evidence and in most cases the evidence is conflicting. Osteoporosis is an important public health problem both in women and men. On the whole, far more epidemiologic, diagnostic and therapeutic studies have been carried out in women than in men. In clinical practice, if this disease remains underestimated in women, patients' and physicians' awareness is even lower for male osteoporosis, for which diagnostic and therapeutic strategies are at present less defined. In conclusion this review emphasizes the urgency of basic science and clinical research to increase our understanding of the gender differences of diseases.

Self-reported pain complaints among Afghanistan/Iraq era men and women veterans with comorbid posttraumatic stress disorder and major depressive disorder

OBJECTIVE

Research has shown significant rates of comorbidity among posttraumatic stress disorder (PTSD), major depressive disorder (MDD), and pain in prior era veterans but less is known about these disorders in Iraq and Afghanistan war era veterans. This study seeks to extend previous work by evaluating the association among PTSD, MDD, and pain (back, muscle, and headache pain) in this cohort.

METHOD

A sample of 1,614 veterans, recruited from 2005 to 2010, completed a structured clinical interview and questionnaires assessing trauma experiences, PTSD symptoms, depressive symptoms, and pain endorsement.

RESULTS

Veterans with PTSD endorsed pain-related complaints at greater rates than veterans without PTSD. The highest rate of pain complaints was observed in veterans with comorbid PTSD/MDD. Women were more likely to endorse back pain and headaches but no gender by diagnosis interactions were significant.

CONCLUSIONS

Findings highlight the complex comorbid relationship between PTSD, MDD, and pain among Iraq and Afghanistan veterans. This observed association suggests that integrated, multidisciplinary treatments may be beneficial, particularly when multiple psychological and physical health comorbidities are present with pain. Further support may be indicated for ongoing education of mental health and primary care providers about these co-occurring disorders.

The relation between pain-related fear and disability: a meta-analysis

Within a biopsychosocial framework, psychological factors are thought to play an important role in the onset and progression of chronic pain. The cognitive-behavioral fear-avoidance model of chronic pain suggests that pain-related fear contributes to the development and maintenance of pain-related disability. However, investigations of the relation between pain-related fear and disability have demonstrated considerable between-study variation. The main goal of the current meta-analysis was to synthesize findings of studies investigating cross-sectional associations between pain-related fear and disability in order to estimate the magnitude of this relation. We also tested potential moderators, including type of measure used, demographic characteristics, and relevant pain characteristics. Searches in PubMed and PsycINFO yielded a total of 46 independent samples (N = 9,579) that reported correlations between pain-related fear and disability among persons experiencing acute or chronic pain. Effect size estimates were generated using a random-effects model and artifact distribution method. The positive relation between pain-related fear and disability was observed to be moderate to large in magnitude, and stable across demographic and pain characteristics. Although some variability was observed across pain-related fear measures, results were largely consistent with the fear-avoidance model of chronic pain.

PERSPECTIVE

Results of this meta-analysis indicate a robust, positive association between pain-related fear and disability, which can be classified as moderate to large in magnitude. Consistent with the fear-avoidance model of chronic pain, these findings suggest that pain-related fear may be an important target for treatments intended to reduce pain-related disability.

Gender differences in pain levels before and after treatment: a prospective outcomes study on 3,900 Swiss patients with musculoskeletal complaints

BACKGROUND

Current studies comparing musculoskeletal pain levels between the genders focus on a single point in time rather than measuring change over time. The purpose of this study is to compare pain levels between males and females before and after treatment.

METHODS

Eleven different patient cohorts (3,900 patients) included in two prospective outcome databases collected pain data at baseline and 1 month after treatment. Treatments were either imaging-guided therapeutic injections or chiropractic therapy. The Mann-Whitney U test was used to calculate differences in numerical rating scale (NRS) median scores between the genders for both time points in all 11 cohorts.

RESULTS

Females reported significantly higher baseline pain scores at 4 of the 11 sites evaluated (glenohumeral (p = 0.015), subacromial (p = 0.002), knee (p = 0.023) injections sites and chiropractic low back pain (LBP) patients (p = 0.041)). However, at 1 month after treatment there were no significant gender differences in pain scores at any of the extremity sites. Only the chiropractic LBP patients continued to show higher pain levels in females at 1 month.

CONCLUSIONS

In these 11 musculoskeletal sites evaluated before and after treatment, only 3 extremity sites and the chiropractic LBP patients showed significantly higher baseline pain levels in females. At 1 month after treatment only the LBP patients had significant gender differences in pain levels. Gender evaluation of change in pain over time is likely to be more clinically important than an isolated pain measurement for certain anatomical sites.

The psycho-social dimension of pain and health-related quality of life in the oldest old

BACKGROUND

Chronic pain has an impact on the physical and social functioning of older people which in turn may worsen their health-related quality of life. Research with focus on prolonged extensive pain in the most elderly and how pain may interfere with their life situation is scarce.

AIMS

  The aims were to describe and investigate pain from a multidimensional point of view (duration, location, psycho-social) and health-related quality of life as well as to compare sex and age groups in people aged 80 years and over.

METHODS

In this cross-sectional study, a total of 225 of 282 people responded to a questionnaire consisting of two instruments and background questions. The psycho-social dimension of pain was measured using the Multidimensional Pain Inventory-Swedish language version (MPI-S) with five scales: Pain Severity, Interference, Life Control, Affective Distress and Social Support. Health-related quality of life was measured using the Short Form Health Survey-12 (SF-12).

RESULTS

Median duration of pain was 9.0 years, and the mean number of pain locations was 2.04. The MPI-S scale Interference with a negative orientation had the highest mean score, while the mean score for Social Support was the highest for the scales with a positive orientation. The duration of pain was significantly greater for women, and those aged 80-85 years had higher pain severity than those aged≥86. Participants with a lower health-related quality of life experienced significantly more severe pain, were more troubled with pain and had less control of their life.

CONCLUSIONS

Older people with prolonged pain suffered from a low health-related quality of life. Pain interfered with their lives and contributed to diminished control in their daily lives. Nurses are essential for the identification and prevention of pain and should be aware of how pain affects older people's physical, mental and social health.

Sex differences in reported pain across 11,000 patients captured in electronic medical records

Clinically recorded pain scores are abundant in patient health records but are rarely used in research. The use of this information could help improve clinical outcomes. For example, a recent report by the Institute of Medicine stated that ineffective use of clinical information contributes to undertreatment of patient subpopulations--especially women. This study used diagnosis-associated pain scores from a large hospital database to document sex differences in reported pain. We used de-identified electronic medical records from Stanford Hospital and Clinics for more than 72,000 patients. Each record contained at least 1 disease-associated pain score. We found over 160,000 pain scores in more than 250 primary diagnoses, and analyzed differences in disease-specific pain reported by men and women. After filtering for diagnoses with minimum encounter numbers, we found diagnosis-specific sex differences in reported pain. The most significant differences occurred in patients with disorders of the musculoskeletal, circulatory, respiratory and digestive systems, followed by infectious diseases, and injury and poisoning. We also discovered sex-specific differences in pain intensity in previously unreported diseases, including disorders of the cervical region, and acute sinusitis (P = .01, .017, respectively). Pain scores were collected during hospital encounters. No information about the use of pre-encounter over-the-counter medications was available. To our knowledge, this is the largest data-driven study documenting sex differences of disease-associated pain. It highlights the utility of electronic medical record data to corroborate and expand on results of smaller clinical studies. Our findings emphasize the need for future research examining the mechanisms underlying differences in pain.

PERSPECTIVE

This article highlights the potential of electronic medical records to conduct large-scale pain studies. Our results are consistent with previous studies reporting pain differences between sexes and also suggest that clinicians should pay increased attention to this idea.

Fifteen Dimensions of Health among Community-Dwelling Older Singaporeans

This paper aims to present a broad perspective of health of older Singaporeans spanning 15 health dimensions and study the association between self-rated health (SRH) and other health dimensions. Using data from a survey of 5000 Singaporeans (≥60 years), SRH and health in 14 other dimensions were assessed. Generalized logit model was used to assess contribution of these 14 dimensions to positive and negative SRH, compared to average SRH. About 86% reported their health to be average or higher. Prevalence of positive SRH and "health" in most other dimensions was lower in older age groups. Positive and negative SRH were associated with mobility, hearing, vision, major physical illness, pain, personal mastery, depressive symptoms, and perceived financial adequacy. The findings show that a majority of older Singaporeans report themselves as healthy overall and in a wide range of health dimensions.

A critical review of gender issues in understanding prolonged disability related to musculoskeletal pain: how are they relevant to rehabilitation?

PURPOSE

The purpose of this critical review is to describe the available theoretical models for understanding the gender issues in prolonged work disability related to persistent musculoskeletal (MSK) pain.

METHOD

A critical literature review was conducted in medicine, health sciences, and social sciences databases (MEDLINE, CINHAL, PsychINFO and SOCINDEX) using specific keywords. After screening titles and abstracts, followed by methodological quality assessment, a total of 55 references were retained for content analysis.

RESULTS

Gender issues in disability related to persistent MSK pain show that men and women may experience pain and rehabilitation process in different ways. Three main themes were exftracted and further described: (1) the experience of distrust; (2) the self-identity process; and (3) the domestic strain. Each of these themes has a specific and potentially different impact on men and women, and we report that experiential differences may strongly impact the rehabilitation process and outcomes such as return to work.

CONCLUSIONS

This critical review provides insight into gender issues in the process of rehabilitation and outcomes such as return to work. We suggest that work and family considerations are the two most important issues in the rehabilitation process and that differences between men and women are likely to occur.

Differences in depression, posttraumatic stress disorder, and lifetime trauma exposure in formerly abused women with mild versus moderate to severe chronic pain

Although associations between intimate partner violence, chronic pain, depression, posttraumatic stress disorder (PTSD), and lifetime trauma exposure are well known, previous studies are limited by their recruitment of women from shelters. These relationships were explored with a community-based sample of formerly abused women ( N = 84). Seventy-seven percent of women reported pain of >3 months duration, and 75% had moderate to severe pain. Based on logistic regression analysis, women with moderate to severe chronic pain were significantly less likely to be employed, had more depressive symptoms, and were in the abusive relationship longer than women in mild chronic pain. Both pain severity groups had equally high levels of depressive and PTSD symptoms and multiple trauma exposures. Findings document the persistence of significant symptomatology in formerly abused women.

The relationship between chronic pain and health-related quality of life in long-term social assistance recipients in Norway

PURPOSE

The purposes of this study were to compare the health-related quality of life (HRQOL) of long-term social assistance recipients (LTRs) with and without chronic pain and determine the effect of select demographic, social, pain, alcohol, and illicit drug use characteristics on the physical and mental components of their HRQOL.

METHODS

In this cross-sectional study, which is part of a larger study that evaluated the health and functional abilities of LTRs in Norway, 405 LTRs of which 178 had chronic pain were recruited from 14 of 433 municipalities.

RESULTS

LTRs with chronic pain were older (P < .001), more often married (P = .002), feeling more lonely, (P = .048), and had more problems with alcohol (P = .035). The final regression model explained 41.2% (P < .001) of the variance in PCS scores and 32.2% (P < .001) of the variance in MCS scores. Being in chronic pain (29.7%), being older (4.7%), and never married (2%) predicted worse PCS scores. Feeling lonely (11.9%), having problems with illicit drug use (5.9%), and being in chronic pain (2.9%) predicted worse MCS scores.

CONCLUSION

LTRs with chronic pain rated both the physical and mental components of HRQOL lower than LTRs without chronic pain. The MCS score in both groups was negatively effected.

Sex differences in experimental and clinical pain sensitivity for patients with shoulder pain

Previous research demonstrates that men and women differ in the way that they perceive and process pain. Much of this work has been done in healthy adults with a lack of consensus in clinical pain populations. The purpose of this study was to investigate how men and women with shoulder pain differ in their experience of experimental and clinical pain and whether psychological processes differentially affect these responses. Fifty-nine consecutive subjects (24 women, 35 men) seeking operative treatment for shoulder pain were enrolled in this study. Subjects completed self report questionnaires to assess clinical pain, catastrophizing, anxiety and depression and underwent a series of experimental pain tests consisting of pressure pain, thermal pain (threshold and tolerance), and thermal temporal summation. Results indicated that women experienced greater clinical pain and enhanced sensitivity to pressure pain. Age did not affect the observed sex differences. There were no sex differences in psychological association with experimental and clinical pain in this cohort. The relationship between clinical and experimental pressure pain was stronger in women as compared to men. These findings offer insight into the interactions between biological and psychosocial influences of pain and how these interactions vary by sex.

The Minimally Important Difference for Patient-reported Outcomes in Spondyloarthropathies including Pain, Fatigue, Sleep, and Health Assessment Questionnaire

Objective.

To study minimal important differences (MID) in spondyloarthropathies (SpA). MID are important in determining clinically relevant changes and for interpretation of trials and treating patients. MID have been widely studied in rheumatoid arthritis, but less so in SpA.

Methods.

Patients with SpA had to be seen for 2 consecutive visits and have completed the Health Assessment Questionnaire (HAQ) and 100 mm visual analog scale on both visits for fatigue, pain, sleep, and global assessment. At the second visit they had to answer a question regarding any change in their overall health (from last visit), responding with much better, better, same, worse, or much worse. The MID were the mean changes for those who were either better or worse.

Results.

Our study involved 140 eligible patients with a SpA: 69% were men, the mean age was 45 years, and the mean disease duration was 14.5 years. Almost half the patients rated themselves as unchanged from the previous visit but the remainder were either better or worse, with a minority rating themselves as much better or much worse. The MID for better and worse outcomes were HAQ (−0.136; 0.220), pain (−6.93; 18.97), fatigue (−1.43; 14.42), and sleep (−2.23; 10.76). No gender differences were observed.

Conclusion.

Our results demonstrate that the MID vary depending on better versus worse (bidirectionally different). MID may be smaller in clinical practice than what is observed in trials.

Sex, gender, and pain: a review of recent clinical and experimental findings

Sex-related influences on pain and analgesia have become a topic of tremendous scientific and clinical interest, especially in the last 10 to 15 years. Members of our research group published reviews of this literature more than a decade ago, and the intervening time period has witnessed robust growth in research regarding sex, gender, and pain. Therefore, it seems timely to revisit this literature. Abundant evidence from recent epidemiologic studies clearly demonstrates that women are at substantially greater risk for many clinical pain conditions, and there is some suggestion that postoperative and procedural pain may be more severe among women than men. Consistent with our previous reviews, current human findings regarding sex differences in experimental pain indicate greater pain sensitivity among females compared with males for most pain modalities, including more recently implemented clinically relevant pain models such as temporal summation of pain and intramuscular injection of algesic substances. The evidence regarding sex differences in laboratory measures of endogenous pain modulation is mixed, as are findings from studies using functional brain imaging to ascertain sex differences in pain-related cerebral activation. Also inconsistent are findings regarding sex differences in responses to pharmacologic and non-pharmacologic pain treatments. The article concludes with a discussion of potential biopsychosocial mechanisms that may underlie sex differences in pain, and considerations for future research are discussed.

PERSPECTIVE

This article reviews the recent literature regarding sex, gender, and pain. The growing body of evidence that has accumulated in the past 10 to 15 years continues to indicate substantial sex differences in clinical and experimental pain responses, and some evidence suggests that pain treatment responses may differ for women versus men.

Depression and self-rated health are proximal predictors of episodes of sustained change in pain in independently living, community dwelling elders

OBJECTIVE

To identify, in community dwelling elders, the determinants of sustained pain improvement or worsening.

DESIGN

A longitudinal study with two baseline and 11 monthly follow-up interviews was conducted. Pain was assessed monthly using the Parmelee adaptation of the McGill Pain Inventory.

SUBJECTS

Subjects included 109 Caucasian and 132 African American, Philadelphia residing Medicare recipients (65-74 years of age).

OUTCOME MEASURES

To identify sustained pain change (> or =2 months), the data for each subject were reconfigured to yield 10 overlapping 3-month data segments. Each segment was classified as improved or worsened pain. Other variables included: the Geriatric Depression Scale (GDS), self-rated health (SRH), physical functioning, and number of improved or worsened medical conditions.

RESULTS

Pain experienced (over 3-month periods) was typically stable. Sustained improved pain was more likely than worsened pain. Odds ratios obtained through Generalized Estimation Equation analyses showed that a 1-point increase in GDS scores increased the odds of worsened pain by 1.18 (1.11-1.30). Fair/poor SRH, being female, and having medical conditions worsen increased the odds of worsened pain by 4.04 (2.12-7.70), 1.63 (1.11-2.38), and 2.12 (1.42-3.16), respectively. Observed, statistically significant associations between these variables, except gender, and improved pain were in the opposite direction.

CONCLUSIONS

With a 1-month time lag between predictor variable assessment and follow-up pain measures, the study supports temporal associations between depressive symptoms and SRH and subsequent pain change. Clinicians providing care to community dwelling elders are advised to evaluate and attend to both the depressive symptoms and SRH of their patients.

Pain in patients living in Norwegian nursing homes

The aims of this study were to describe the pain and use of pain medication in nursing home patients and examine which variables that were associated with pain. Inpatients (n = 307) older than 64 years from nursing homes were included. Pain was measured with a 4-point verbal rating scale in the self-reported group (SRG) and Doloplus-2 in the proxy-rated group (PRG). The mean age was 86 years (SD, 7), and more than two-thirds were female. A total of 128 (60%) patients were able to self-report their pain. Approximately 50% of the SRG reported 'pain now', and of these, nearly 50% reported moderate or severe pain intensity. Better cognitive function was associated with higher pain and receiving more potent pain medication in the SRG. The pain prevalence in the PRG was higher than in the SRG (67.5% vs 51%), but no variable was associated with proxy-rated pain. Nearly 30% in the SRG and 40% in the PRG did not receive pain medication in spite of pain. Pain is still a huge problem in the nursing homes, and more research is needed on pain management in nursing home residents.

Pain and quality of life in hospitalized patients with heart failure

The pain experience of patients with heart failure (HF) and its impact on their quality of life (QOL) has not been described in sufficient detail. This study sampled patients hospitalized with HF to describe the prevalence and severity of bodily pain; evaluate differences in bodily pain related to selected demographic and disease-specific characteristics; and evaluate the effect of selected demographic, disease-specific characteristics, bodily pain, and mental health on QOL. Two items from the Medical Outcomes Study--Short Form (SF-36) were used to measure pain, and one subscale of the SF-36 was used to evaluate mental health. The Minnesota Living With Heart Failure Questionnaire was used to measure QOL. Patients with HF (n=93) had a mean age of 75 years, were predominantly male (65%), and lived alone (47.3%). Lung diseases and diabetes were the most common comorbidities; 58% were categorized as New York Heart Association (NYHA) Class III, whereas 58% of the sample was diagnosed with HF in the past four years. Of note, 85% of the patients reported pain and 42.5% said that it was in the severe or very severe range. No demographic variables were associated with pain, whereas a higher number of chronic conditions were associated with pain. SF-36 mental health and pain scores, as well as NYHA class, explained 34.1% of the variance in QOL in patients with HF. These data suggest that pain is highly prevalent and has a significant impact on the QOL of patients with HF. However, additional research is warranted to determine the specific causes and characteristics of pain in these patients.

Women in chronic pain: sense of control and encounters with health professionals

An evolving theory on "women's sense of control while in chronic pain and the results of the quality of their encounters with health professionals" is introduced in this article. According to the theory, the main challenge of women in chronic pain is to maintain a sense of control of self and the pain to avoid demoralization, which is seen as a potential threat for all women in chronic pain. To retain a sense of control, women are challenged to learn to live with the pain and cope with the unpredictability and incurability of the pain. They are challenged to find meaning in their suffering, to create personal space, and to be self-protective as well as to keep a positive self-image and self-esteem while trying to live a "normal" life in dignity in spite of the pain and warding off isolation and demoralization. Health professionals are seen as potentially powerful people in the lives of women in chronic pain. Empowerment or disempowerment from them greatly influences whether women in chronic pain are demoralized or not.

Demographic, clinical, and pain characteristics are associated with average pain severity groups in a sample of oncology outpatients

Cut-points (CP) for pain severity are useful because they may help clinicians to identify patients with clinically significant pain. However, a need exists to evaluate whether different pain severity groups differ on selected demographic, clinical, and pain characteristics, as well as on factors that may be amenable to psychoeducational interventions such as self-efficacy for pain management, coping strategies, and barriers to pain management. In this cross-sectional study of 210 oncology outpatients with pain, an optimal CP of 4 was found using ratings of average pain intensity. The variables that provided a unique contribution to the prediction of membership in the >4 CP group were gender, presence of breakthrough pain, comorbidities, barriers to pain management, and total self-efficacy for pain management. In addition, patients in the >4 CP group reported lower scores on physical, role, cognitive, and global health function.

PERSPECTIVE

An average pain CP of >4 could be used to screen oncology outpatients with clinically significant pain. Clinicians must consider a number of demographic, clinical, and pain characteristics as part of their pain assessment procedures. The effectiveness of psychoeducational interventions aimed at barriers and patients self-efficacy for pain management need to be tested.

Self-reported prevalence, etiology, and characteristics of pain in oncology outpatients

PURPOSE

To determine the self-reported prevalence rates for cancer, non-cancer, and both cancer and non-cancer pain and to determine if there were differences in demographic, clinical, and pain characteristics among the three pain groups.

METHODS

Patients were screened in outpatient oncology clinics for the presence of pain and/or analgesic use. Patients who reported pain completed the study questionnaires.

RESULTS

A total of 1790 patients were available for screening in the outpatient clinics and 1549 (86.5%) completed the screening questionnaire. Out of them, 332 (21.4%) reported pain or used analgesics. Of the 217 patients who completed the study questionnaires, 53% had only cancer pain (pain due to cancer and/or treatment), 25.3% had non-cancer pain, and 21.7% had both cancer and non-cancer pain. No differences were found, among the three pain groups, in pain intensity or pain duration. However patients in the cancer and non-cancer pain group had higher pain interference scores, higher severity scores for various pain descriptors, and a higher number of pain locations.

CONCLUSIONS

These findings suggest that outpatients with a combination of cancer and non-cancer pain may be at greater risk for under-treatment of pain. Oncology clinicians and primary care providers need to perform a comprehensive pain assessment of all oncology patients in order to be able to formulate an effective pain management plan.

Satisfaction with quality of life poststroke: effect of sex differences in pain response

OBJECTIVE

To study the relationship between sex differences among men and women in the response to pain and the effect on satisfaction with quality of life (QOL) in poststroke patients approximately 90 days after discharge from inpatient medical rehabilitation.

DESIGN

Cross-sectional design.

SETTING

Community based.

PARTICIPANTS

The sample included 1724 patients (877 men, 847 women) aged 40 years and older with a history of stroke, according to information obtained from the IT HealthTrack database. The average age was 68.7 years; 79.3% were non-Hispanic white.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURE

Satisfaction with QOL.

RESULTS

Pain ratings for both the men and the women were significant and inversely associated with satisfaction with QOL after adjustments for possible confounding factors. However, among men with stroke, each 1-point increase in pain rating was associated with an 18% decreased odds of being satisfied with QOL (odds ratio [OR], .81; 95% confidence interval [CI], .77-.86). Conversely, among women with stroke, each 1-point increase in pain rating was associated with an 11% decreased odds of being satisfied with QOL (OR=.89; 95% CI, .84-.95).

CONCLUSIONS

Our data indicate that pain after stroke is significantly associated with reduced satisfaction with QOL, particularly among men. Increased awareness and treatment of pain may improve satisfaction with QOL. Our findings suggest that sex differences and pain response are clinically important factors in examining satisfaction with QOL in the poststroke population.

Effect of chronic diseases and associated psychological distress on health-related quality of life

BACKGROUND

The purpose of this study was to clarify the correlations between the presence of comorbidities and psychological distress and health-related quality of life (HRQL). This was a population-based cross-sectional study.

METHODS

Parents and grandparents of students from seven randomly selected primary schools in the city centre were asked to answer questionnaires sent by their children. All subjects were questioned for somatic diseases, psychological distress and HRQL by Health Questionnaire, Hospital Anxiety and Depression scale and short-form-12 health survey, respectively.

RESULTS

Out of 5024 parents and grandparents (mean age 52.3 +/- 14.3 years, range 20-104 years) of primary school students 4605 returned the questionnaires, a figure that corresponds to the overall response rate of 91.6%. Chronic diseases substantially reduced HRQL and this effect did not differ markedly with the type of chronic disease. Association of comorbidities with psychological distress further impaired HRQL. As the number of chronic diseases was increased, HRQL and physical and mental functioning declined. The worst HRQL was observed in subjects who had five or more comorbidities associated with psychological distress.

CONCLUSION

The present study indicates significant adverse effects of chronic diseases and psychological distress on HRQL in adults, the effect of psychological distress being the most important. Our results lead us to suggest that in the management of comorbidities, the detection of the presence and severity of associated psychological distress and its treatment, besides the specific treatment of comorbidities, may provide dramatic improvement in HRQL of the patients.

Gender differences in psychosocial influence and rehabilitation outcomes for work-disabled individuals with chronic musculoskeletal pain

INTRODUCTION

This study aimed to investigate gender differences in rehabilitation outcomes and how psychosocial factors may interact to influence rehabilitation outcome in work-disabled with chronic musculoskeletal pain.

METHODS

One hundred and sixty eight (n=168) persons (mean age = 45.5/SD=9.0) participating in a multidisciplinary rehabilitation program, were included. Data on pain, functional health and psychosocial factors were collected previous to treatment, after 5 week intensive training and after 52 week follow-up period. Demographics, socio-economics and data on personal characteristics were also collected.

RESULTS

Significant (p<.05) gender differences were found on sleeplessness, meaningfulness and manageability. No significant gender differences were found on pain or functional health status variables. Gender differences (p<.001) were found in how socio-demographic and psychosocial factors influence rehabilitation outcomes in terms of functional health status.

CONCLUSIONS

These data suggests that knowledge of gender differences and the way psychosocial factors influence rehabilitation outcomes must be taken into account in designing rehabilitation intervention.

Gender differences in implantable cardioverter-defibrillator patients at the time of insertion

Gender differences in physical and psychological health and responses in persons receiving implantable cardioverter-defibrillators (ICDs) have been reported but are not well delineated. This study examined symptoms of pain and sleep difficulties, functional status, and psychological responses in 180 (75%) men and 60 (25%) women before and immediately following their first ICD implantation. Women were significantly younger, less likely to be married, and had less history of coronary artery disease than men. Forty-eight percent of women were New York Heart Association class III-IV vs. 27% of men (p<0.05). Women had lower functional status and were more likely to report symptoms of increased pain severity and sleep difficulties. Differences in functional status and pain were reduced after adjusting for New York Heart Association class and age, respectively. There were no differences in depressive symptoms or anxiety. Clinical implications of gender-related responses include the need to address symptoms of heart failure as well as increased pain and sleep difficulties in women at the time surrounding ICD implantation. Longitudinal studies and gender-focused nursing interventions should be developed to promote better understanding of responses and to improve recovery outcomes for ICD patients.

Status of cancer pain in Hanoi, Vietnam: A hospital-wide survey in a tertiary cancer treatment center

Little is known about the prevalence of cancer pain in many developing countries. We report a hospital-wide survey of pain in a tertiary cancer center in Hanoi, Vietnam. All inpatients and outpatients age 18 years or older were approached for participation in the study. Data were collected using the Brief Pain Inventory. Results showed a 70% response rate. Prevalence of moderate to severe pain was 50% (89/178), with 23% reporting severe ratings of pain at its "worst" and 33% reporting severe impairment in their ability to work due to pain. Only 1% and 40% reported total and partial pain relief from medications, respectively. This study is among the first to provide a representative view of pain in a tertiary cancer treatment center in Hanoi, Vietnam. The findings provide empirical support for the need for better programmatic efforts to improve relief of cancer pain in developing countries, including Vietnam.

Gender Differences in Pain and Healthcare Utilization for Adult Sickle Cell Patients: The PiSCES Project

BACKGROUND

Many studies have found gender differences in frequency and intensity of pain. Women often report lower pain thresholds, higher pain ratings, and lower tolerance for pain. People with sickle cell disease (SCD) experience both chronic and acute pain throughout life.

OBJECTIVES

To compare adult men and women with SCD in terms of reported pain, crises, healthcare utilization, and opioid usage.

METHODS

Two hundred twenty-six adults with SCD in Virginia were enrolled in a prospective cohort study of pain and completed daily diaries for 1-6 months. Subjects reported for the previous day their maximum SCD-related pain, distress, and interference (0-9 scale), whether they were in a sickle cell crisis, had unplanned utilization (clinic, emergency room, or hospitalization), or used opioids. Episodes of pain, crisis, or utilization were defined as consecutive days of such. Men and women were compared, using analysis of covariance (ANCOVA), controlling for age, SCD genotype, depression, and education.

RESULTS

There were no significant differences between men and women in the percentage of days subjects experienced pain (men 58.6% vs. women 56.5%) or the number of pain episodes/6 months (7.7 vs. 9.6). Mean pain scores were comparable, when subjects were in crisis (5.5 vs. 5.6) or not (2.5 vs. 2.2). Distress and interference results were similar. Men with the SS genotype reported a higher percentage of days with crisis(18.5% vs. 11.6%) and utilization (5.1% vs. 2.7%) than women with the SS genotype.

CONCLUSIONS

Contrary to many studies of pain, particularly chronic pain, men and women with SCD reported generally similar pain experiences.

Health-related quality of life, health risk behaviors, and disability among adults with pain-related activity difficulty

OBJECTIVES

We examined the association between pain-related activity difficulty (PRAD) in the past 30 days and health-related quality of life, health behaviors, disability indices, and major health impairments in the general US population.

METHODS

We obtained data from 18 states in the 2002 Behavioral Risk Factor Surveillance System, an ongoing, cross-sectional, state-based, random-digit-dialed telephone survey of noninstitutionalized adults aged 18 years or older.

RESULTS

Nearly one quarter of people in the 18 states and the District of Columbia reported at least 1 day of PRAD in the past 30 days. PRAD was associated with obesity, smoking, physical inactivity, impaired general health, infrequent vitality, and frequent occurrences of physical distress, mental distress, depressive symptoms, sleep insufficiency, and anxiety symptoms. Moreover, a general dose-response relationship was noted between increased days of PRAD and increased prevalence of impaired health-related quality of life, disability indices, and health risk behaviors.

CONCLUSION

Pain negatively influences various domains of health, not only among clinical populations, but also in the general community, suggesting a critical need for the dissemination of targeted interventions to enhance recognition and treatment of pain among adult community-dwellers.