Measuring Health: A Guide to Rating Scales and Questionnaires

Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings

https://www.rima.org/web/medline_pdf/Am_J_Med_682.pdf

Exercise-based rehabilitation for patients with coronary heart disease: systematic review and meta-analysis of randomized controlled trials.

Background
Coronary heart disease (CHD) is the most common cause of death globally. However, with falling CHD mortality rates, an increasing number of people living with CHD may need support to manage their symptoms and prognosis. Exercise‐based cardiac rehabilitation (CR) aims to improve the health and outcomes of people with CHD. This is an update of a Cochrane Review previously published in 2016.

Objectives
To assess the clinical effectiveness and cost‐effectiveness of exercise‐based CR (exercise training alone or in combination with psychosocial or educational interventions) compared with 'no exercise' control, on mortality, morbidity and health‐related quality of life (HRQoL) in people with CHD.

Search methods
We updated searches from the previous Cochrane Review, by searching CENTRAL, MEDLINE, Embase, and two other databases in September 2020. We also searched two clinical trials registers in June 2021.

Selection criteria
We included randomised controlled trials (RCTs) of exercise‐based interventions with at least six months’ follow‐up, compared with 'no exercise' control. The study population comprised adult men and women who have had a myocardial infarction (MI), coronary artery bypass graft (CABG) or percutaneous coronary intervention (PCI), or have angina pectoris, or coronary artery disease.

Data collection and analysis
We screened all identified references, extracted data and assessed risk of bias according to Cochrane methods. We stratified meta‐analysis by duration of follow‐up: short‐term (6 to 12 months); medium‐term (> 12 to 36 months); and long‐term ( > 3 years), and used meta‐regression to explore potential treatment effect modifiers. We used GRADE for primary outcomes at 6 to 12 months (the most common follow‐up time point). 

Main results
This review included 85 trials which randomised 23,430 people with CHD. This latest update identified 22 new trials (7795 participants). The population included predominantly post‐MI and post‐revascularisation patients, with a mean age ranging from 47 to 77 years.

In the last decade, the median percentage of women with CHD has increased from 11% to 17%, but females still account for a similarly small percentage of participants recruited overall ( < 15%). Twenty‐one of the included trials were performed in low‐ and middle‐income countries (LMICs). Overall trial reporting was poor, although there was evidence of an improvement in quality over the last decade. The median longest follow‐up time was 12 months (range 6 months to 19 years).

At short‐term follow‐up (6 to 12 months), exercise‐based CR likely results in a slight reduction in all‐cause mortality (risk ratio (RR) 0.87, 95% confidence interval (CI) 0.73 to 1.04; 25 trials; moderate certainty evidence), a large reduction in MI (RR 0.72, 95% CI 0.55 to 0.93; 22 trials; number needed to treat for an additional beneficial outcome (NNTB) 75, 95% CI 47 to 298; high certainty evidence), and a large reduction in all‐cause hospitalisation (RR 0.58, 95% CI 0.43 to 0.77; 14 trials; NNTB 12, 95% CI 9 to 21; moderate certainty evidence). Exercise‐based CR likely results in little to no difference in risk of cardiovascular mortality (RR 0.88, 95% CI 0.68 to 1.14; 15 trials; moderate certainty evidence), CABG (RR 0.99, 95% CI 0.78 to 1.27; 20 trials; high certainty evidence), and PCI (RR 0.86, 95% CI 0.63 to 1.19; 13 trials; moderate certainty evidence) up to 12 months' follow‐up. We are uncertain about the effects of exercise‐based CR on cardiovascular hospitalisation, with a wide confidence interval including considerable benefit as well as harm (RR 0.80, 95% CI 0.41 to 1.59; low certainty evidence). There was evidence of substantial heterogeneity across trials for cardiovascular hospitalisations (I2 = 53%), and of small study bias for all‐cause hospitalisation, but not for all other outcomes.

At medium‐term follow‐up, although there may be little to no difference in all‐cause mortality (RR 0.90, 95% CI 0.80 to 1.02; 15 trials), MI (RR 1.07, 95% CI 0.91 to 1.27; 12 trials), PCI (RR 0.96, 95% CI 0.69 to 1.35; 6 trials), CABG (RR 0.97, 95% CI 0.77 to 1.23; 9 trials), and all‐cause hospitalisation (RR 0.92, 95% CI 0.82 to 1.03; 9 trials), a large reduction in cardiovascular mortality was found (RR 0.77, 95% CI 0.63 to 0.93; 5 trials). Evidence is uncertain for difference in risk of cardiovascular hospitalisation (RR 0.92, 95% CI 0.76 to 1.12; 3 trials).

At long‐term follow‐up, although there may be little to no difference in all‐cause mortality (RR 0.91, 95% CI 0.75 to 1.10), exercise‐based CR may result in a large reduction in cardiovascular mortality (RR 0.58, 95% CI 0.43 to 0.78; 8 trials) and MI (RR 0.67, 95% CI 0.50 to 0.90; 10 trials). Evidence is uncertain for CABG (RR 0.66, 95% CI 0.34 to 1.27; 4 trials), and PCI (RR 0.76, 95% CI 0.48 to 1.20; 3 trials).

Meta‐regression showed benefits in outcomes were independent of CHD case mix, type of CR, exercise dose, follow‐up length, publication year, CR setting, study location, sample size or risk of bias.

There was evidence that exercise‐based CR may slightly increase HRQoL across several subscales (SF‐36 mental component, physical functioning, physical performance, general health, vitality, social functioning and mental health scores) up to 12 months' follow‐up; however, these may not be clinically important differences. The eight trial‐based economic evaluation studies showed exercise‐based CR to be a potentially cost‐effective use of resources in terms of gain in quality‐adjusted life years (QALYs).

Authors' conclusions
This updated Cochrane Review supports the conclusions of the previous version, that exercise‐based CR provides important benefits to people with CHD, including reduced risk of MI, a likely small reduction in all‐cause mortality, and a large reduction in all‐cause hospitalisation, along with associated healthcare costs, and improved HRQoL up to 12 months' follow‐up. Over longer‐term follow‐up, benefits may include reductions in cardiovascular mortality and MI. In the last decade, trials were more likely to include females, and be undertaken in LMICs, increasing the generalisability of findings. Well‐designed, adequately‐reported RCTs of CR in people with CHD more representative of usual clinical practice are still needed. Trials should explicitly report clinical outcomes, including mortality and hospital admissions, and include validated HRQoL outcome measures, especially over longer‐term follow‐up, and assess costs and cost‐effectiveness.

/pdf/exercise-based-cardiac-rehabilitation-for-coronary-heart-ctqt9teiud.pdf

Exercise-based cardiac rehabilitation for coronary heart disease

Sjögren's syndrome

Muscle energy metabolism was studied by chemical analysis of biopsy samples from: 1) trigger points in the trapezius muscle from 15 patients with primary fibromyalgia (PF), 2) nonpainful, anterior tibial muscle from 6 patients with PF, and 3) the trapezius muscle from 8 healthy controls. We found a decrease in the levels of adenosine triphosphate, adenosine diphosphate, and phosphoryl creatine, and an increase in the levels of adenosine monophosphate and creatine, in the trapezius muscles from the patients. These findings support the notion that the pain in patients with PF is of muscular origin.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/art.1780290701

Reduced high-energy phosphate levels in the painful muscles of patients with primary fibromyalgia.

Seventy-seven muscle biopsies from 57 patients with primary fibromyalgia and 17 biopsies from 9 healthy controls were examined by routine histopathological and histochemical methods All patients fulfilled strict diagnostic criteria 42 biopsies from patients were deemed normal or borderline, while 35 showed discrete pathological changes (degeneration, regeneration, inflammatory infiltrates, ragged red fibres, and 'moth-eaten' fibres in muscles other than m trapezius) Biopsies from controls were normal or borderline in 14 and showed mild focal abnormalites in 3 cases 'Moth-eaten' fibres were found in 35 of 41 trapezius biopsies taken from patients and in 9 of 10 trapezius biopsies from controls Ragged red fibres were found in 15 of 41 trapezius biopsies taken from patients In the deltoid muscle, 'moth-eaten' fibres were found in 3 and ragged red fibres in 2 of 9 biopsies from patients Frequency of type I and type II fibres and the area of muscle fibres were the same in patients as in controls Capillary density was the same in both groups These changes, although not sufficient to constitute a diagnostic test for PF, indicate that this condition has an organic basis

Muscle biopsy in primary fibromyalgia. Light-microscopical and histochemical findings.

OBJECTIVE: To investigate the prevalence of current and chronic pain and their relationship to pain intensity, sex, age, income, employment status, citizenship, marital status, urban residence, occupational activity, and healthcare-seeking based on a representative sample from a Swedish county. METHODS: A cross-sectional survey using a postal questionnaire was sent to a representative sample (n = 9952) of the target population (284,073 people, age 18-74 yrs) in a county (Ostergotland) in southern Sweden. A questionnaire was mailed and followed by 2 postal reminders if necessary. RESULTS: The participation rate was 76.7% (n = 7637); nonparticipants were on average younger, male, and earned less money. The overall point prevalence of pain was 48.9%. The corresponding one-month period prevalence was 63.0%, and pain on several occasions during the previous 3 months was reported by 61.3% of participants. The prevalence of chronic pain (pain > 3 months) was 53.7%. Female sex, age, and sick leave/early retirement were generally of significant importance in the regressions of pain. No sex factor was found in the regressions of pain frequency and pain intensity. Chronic pain especially frequent and intensive pain showed clear associations with healthcare-seeking and occupational activity. CONCLUSION: High prevalence of current pain (48.9%) and chronic pain (53.7%) were found in this community-based study. Being female, older, and on sick leave or early retirement were generally of significant importance in the regressions of pain. Chronic pain showed clear associations with healthcare-seeking and occupational activity, indicating considerable socioeconomic costs.

https://www.jrheum.org/content/jrheum/31/7/1399.full.pdf

Prevalence of current and chronic pain and their influences upon work and healthcare-seeking: a population study.

The clinical symptoms of 55 patients with primary fibromyalgia (PF) were studied and compared with 30 patients with rheumatoid arthritis (RA). The PF patients expressed a more intense feeling of illness than did the RA patients. Stiffness occurred just as often in PF as in RA. Trigger points occurred less frequently in RA patients. Muscular fatigue appeared to be one of the most disabling symptoms in PF. Neurophysiological studies indicated that the fatigue was at least partly of central origin. Ischemic forearm exercise test gave no evidence of impaired glycogenolysis. Laboratory investigation revealed normal 25-hydroxyvitamin D, cobalamin, folate, estrogen, testosterone, and myoglobin in the PF patients.

Primary Fibromyalgia: A Clinical and Laboratory Study of 55 Patients

The influence of chronic pain on daily life was studied in 58 patients (55 women and three men) with fibromyalgia. The mean age was 45 +/- 11 (SD) years. A mail questionnaire including a 2-day diary was used for data collection. Information was gathered on social background, employment status, symptoms, physical training habits, patients' experience of general health, physical condition, and difficulties in performing motor tasks. The patient reported every half hour in the activity diary the degree of pain and fatigue, whether the activities were difficult to perform, and whether the patient considered them to be enjoyable, valuable, and meaningful. Fifty-five percent of the group had gainful employment. Most were working shorter hours and with changed work tasks. Motor tasks, such as carrying, holding, and running were more difficult to perform than before the onset of the symptoms, and half of the group reported most of their activities as strenuous to perform. Thirty-nine persons (67%) reported no, or very short, pain-free periods during the 2 days. In conclusion, symptoms influenced daily life considerably, and almost all patients reported changes in habits and routines as a consequence of fibromyalgia. An assessment of the patient's total life situation gives valuable information for understanding the patients' ability to handle everyday life.

Ann Bengtsson

Papers

Reduced high-energy phosphate levels in the painful muscles of patients with primary fibromyalgia.

Muscle biopsy in primary fibromyalgia. Light-microscopical and histochemical findings.

Prevalence of current and chronic pain and their influences upon work and healthcare-seeking: a population study.

Primary Fibromyalgia: A Clinical and Laboratory Study of 55 Patients

Living with fibromyalgia. Consequences for everyday life.