Physical inactivity in COPD and increased patient perception of dyspnea

Factors Influencing Compliance with Pulmonary Rehabilitation in Patients with Stable COPD: a Cross Sectional Study

Background

Pulmonary rehabilitation (PR) is recognized as a cost-effective non-pharmacological treatment modality to promote quality of life and delay disease progression in patients with chronic obstructive pulmonary disease (COPD). Although PR has been shown to be effective, it is underutilized in clinical practice. This study aimed to investigate the factors associated with affecting compliance with PR in stable COPD patients.

Methods

This study is a cross-sectional survey. Patients with stable COPD were included using convenience sampling method. Data were collected using questionnaires including the demographic questionnaire, PR Compliance Questionnaire, mMRC dyspnea Scale, Family Support Scale, and Chronic Disease Self-Efficacy Scale (SES6G). Univariate analysis and multiple linear regression analysis were used to analyze the data.

Results

The 100 patients with stable COPD were moderately compliant with PR (3.51 ± 0.65), with the highest compliance with medication (4.10 ± 0.86) and the lowest with exercise (3.03 ± 1.16). Univariate analysis showed statistically significant influences on PR compliance were gender (P = 0.029), educational level (P = 0.021), exercise habits (P < 0.01), willingness to PR (P < 0.01), difficulty of PR (P = 0.030), mMRC (P = 0.002), and SES6G (P = 0.002). The following equation represents the multiple linear regression model: PR compliance = 0.235 × exercise habits + 0.609 × willingness to PR + 0.325 × difficulty of PR (P < 0.0001), adjusted R2 = 0.330, F=7.974, and Durbin-Watson ratio = 2.049. Patients' good exercise habits in regular life, stronger willingness to PR, and easier PR programs may contribute to improved PR compliance.

Conclusion

This study suggested that stable COPD patients were not sufficiently compliant with PR and revealed related important factors affecting the compliance. Exercise habits, willingness to PR, and PR difficulty were found to be significant influencing factors. The results of this study can provide evidence for developing a more appropriate PR program and promoting PR compliance in the future.

Moderating Effect of Dyspnea in the Relationship Between Death Anxiety and Self-Management in COPD: A Structural Equation Modeling Analysis

The study was conducted to examine the moderating effect of dyspnea (according to Modified Medical Research Council-mMRC scale) on the relationship between death anxiety (DA) and self-management (SM) levels in patients suffering from chronic obstructive pulmonary disease (COPD) (n = 313). Model fit indices are within appropriate limits (χ2/DF = 2.284, GFI = .855, CFI = .796, RMSEA = .064). In mMRC 2, females had 33 times more DA than males. In mMRC 3, DA increased 36 times with increasing age and 14 times with comorbidity. It decreased 15-fold in those with past exacerbation experience. The second model explained DA by 18% while the moderating effect of severe dyspnea contributed 28% to this association. In this group of patients, a one unit increase in DA led to a 53-fold increase in SM. Age, gender, comorbidity and previous exacerbation history affect DA in patients with COPD. Increased DA decreases self-management. Severe dyspnea has a moderating effect between DA and SM.

Comparative effectiveness of eHealth interventions on the exercise endurance and quality of life of patients with COPD: A systematic review and network meta-analysis

AIMS

To compare the effectiveness of different types of eHealth interventions in improving exercise endurance and quality of life in chronic obstructive pulmonary disease (COPD) patients.

BACKGROUND

COPD is a chronic airway disease characterized by persistent respiratory symptoms and airflow limitation. eHealth interventions have been accepted and recognized by healthcare professionals and COPD patients as an effective alternative to pulmonary rehabilitation. However, it is not clear which eHealth interventions are effective and preferred for exercise endurance and quality of life in COPD patients.

DESIGN

A systematic review and network meta-analysis based on PRISMA-NMA.

METHODS

We searched nine electronic databases to identify randomized controlled trials addressing the effect of eHealth interventions on the exercise endurance and quality of life of COPD patients from their inception to 30 October 2022. First, a random-effects model was chosen to conduct a traditional meta-analysis to directly investigate the efficacy of different eHealth interventions. Next, a network meta-analysis was performed to evaluate the relative efficacy of the eHealth interventions for COPD. The quality of the data was assessed using the Cochrane Risk of Bias tool.

RESULTS

Fifty-one studies containing six eHealth interventions (telemonitoring, application [APP], web-based interventions, phone calls, virtual reality and combined interventions [≥two types]) were included in the final analysis. Network meta-analysis showed that telemonitoring, APP, web-based interventions and combined interventions improved exercise endurance in COPD patients, with telemonitoring being the most effective. Web-based interventions and apps are effective in improving the quality of life, and web-based interventions are the most effective.

CONCLUSIONS

This study confirms that eHealth interventions can improve exercise endurance and quality of life in COPD patients. In the future, healthcare professionals can promote the use of telemedicine in COPD patients to enhance their exercise endurance and quality of life according to their individual needs.

RELEVANCE TO CLINICAL PRACTICE

This evidence suggests that eHealth interventions can improve exercise endurance and quality of life in COPD patients. Therefore, in the future, eHealth interventions could be used to maximize their effectiveness in improving exercise endurance and quality of life in COPD patients.

A survey exploring the needs, preferences, and challenges of the key stakeholders for participating in and developing pulmonary rehabilitation in Pune, India

Considering a huge burden of chronic respiratory diseases (CRDs) in India, there is a need for locally relevant Pulmonary rehabilitation (PR) services. This cross-sectional survey was aimed to explore the interest, needs and challenges among various stakeholders for PR in Pune city, India. At the outpatient respiratory medicine department of a multi-speciality hospital in Pune, India, 403 eligible people with CRDs were invited to participate in the survey, of which 370 (92%) responded and agreed to participate. (220 males, mean ± SD age 56 ± 15 years). Out of the 370, 323 (87%) people with CRDs were keen to attend PR. In a multiple selection question, there was inclination towards paper-based manuals home-based (70%) and web-based (84%) programs. 207 healthcare providers (HCPs), including physicians, pulmonologists and physiotherapists involved in the care of people living with CRDs across Pune city were invited to participate in the survey. Out of the 207, (80%) of the HCPs believed that PR was an effective management strategy and highlighted the lack of information on PR and need for better understanding of PR (48%) and its referral process. The surveyed stakeholders are ready to take up PR, identifying specific needs around further knowledge of PR, modes of delivery, and referral processes, that could potentially feed the development of relevant PR programs in the Indian healthcare settings.

Kinesiophobia and Associated Factors in Patients With Myocardial Infarction

Kinesiophobia is a well-known barrier to positive clinical outcomes among patients with various diseases, but there remain few comprehensive studies of kinesiophobia among patients with myocardial infarction (MI). In this cross-sectional study, we investigated the presence of kinesiophobia and its relationship with clinical outcomes among 42 patients with MI who completed the Tampa Scale of Kinesiophobia Swedish Version for Heart (TSK-SV Heart) the International Physical Activity Questionnaire-Short Form (IPAQ-SF), the Six-Minute Walk Test (6MWT), the Hospital Anxiety and Depression Scale (HADS), the modified Medical Research Council (mMRC) Dyspnea Scale, the Charlson Comorbidity Index (CCI), and the MacNew Heart Disease Health-Related Quality of Life Questionnaire. The participants' mean TSK-SV Heart score was 39.24 (SD = 6.65), and 71.4% of these patients reported a high level of kinesiophobia. The TSK-SV Heart score demonstrated a strong correlation with the IPAQ-SF, 6MWT walking distance, and mMRC score (p < .001), and a moderate correlation with the HADS, CCI, and MacNew Heart Disease HRQoL (p < .05). Patients with a high level of kinesiophobia had lower IPAQ-SF, 6MWT walking distance, and HRQoL and higher mMRC, CCI, and HADS scores than patients with low levels of kinesiophobia (p < .05). Kinesiophobia was common and represented a considerable risk factor for physical-psychosocial dysfunctions in these patients with MI. To maintain functional independence and to increase physical activity level, clinicians should consider kinesiophobia from early to late-stage disease and should add a treatment focus that seeks to eliminate kinesiophobia in cardiac rehabilitation programs.

Investigation of Factors Affecting Shuttle Walking Performance at Increased Speed for Patients with Chronic Obstructive Pulmonary Disease

The aim of this study was to examine the factors affecting the shuttle walking test (SWT) in patients with chronic obstructive pulmonary disease (COPD). A total of 29 patients with COPD (the COPD group) and a healthy group (HG) of 34 women aged between 55 and 74 years were included in the study. After the pulmonary function profiles of the participants were assessed, and the SWT was performed. Walking distances, walking speeds, and SWT levels (SWT-L) were determined with the SWT. Before and after the SWT, the heart rate (HR), oxygen saturation level (SPO2), and Borg scale (perceived exertion (BSe) and dyspnea (BSd)) results were analyzed with a paired sample t-test. The dyspnea levels during activity of daily living were determined with the Medical Research Council (MRC) dyspnea scale, and the relationship between MRC dyspnea (MRCD) and walking distance, speed, and SWT-L was tested using multiple linear regression and Pearson correlation analysis. The walking distance, speed, and SWT-L were lower in the COPD group (p < 0.001) than in the HG. The HR values before and after the SWT changed significantly in the COPD group and the HG (p< 0.001), and the effect size was higher in the COPD group. Although the BSe and BSd results before and after the SWT in the COPD group increased significantly (p < 0.001), they did not change in the HG. There was a highly negative correlation between MRCD and walking distance, speed, and SWT-L in the COPD group (p = 0.002, p = 0.000, and p = 0.001, respectively), but no correlation was found in the HG. The results showed that the HR, perceived exertion, and dyspnea levels of women with COPD whose respiratory functions were lower than the HG were significantly affected on the SWT.

Effect of Perceived Dyspnea on Attitude Toward Death From the Perspective of COPD Patients

In this study, it was aimed to examine attitudes toward dyspnea and death from the perspective of Chronic Obstructive Pulmonary Disease (COPD) patients and to determine the relationship between them. This descriptive research was carried out in the chest diseases clinic of a public hospital and with the participation of COPD patients (n = 124). The data were obtained from the Personal Information Form, Death Attitude Profile-Revised, and Medical Research Council Scale. The neutral acceptance and approach acceptance subscale is explained as believing that death is an inevitable part of life and a transition to life after death. The escape acceptance subscale is explained as believing that life will save from physical or psychological harms. It was determined that the Neutral Acceptance and Approach Acceptance sub-dimension of the predictors of dyspnea, comorbid diseases, and COPD had a significant effect at a rate of 33% (p = 0.000). Dyspnea, Comorbid diseases, and the predictors of the severity of COPD affect the Escape Acceptance sub-dimension by 57% (p = 0.000). This research has shown that fear of death is high in COPD patients with high perceived dyspnea. The psychological support provided to patients with COPD should be considered to relieve the fear of death. New studies are needed in which these should be reevaluated in the same context.

Correlation of symptoms and physical activity level in chronic obstructive pulmonary disease patients: results from the observational SPACE study

OBJECTIVES

Chronic obstructive pulmonary disease (COPD) is characterized by persistent airflow limitation and high symptom burden that interferes with physical activity and results in a vicious cycle of inactivity and symptom worsening. The aim of this multicenter, observational study was to determine the prevalence and severity of morning, daytime and night-time symptoms as well as patterns of physical activity levels (PALs) and their interrelation in Belgian COPD patients, enrolled in the multinational SPACE study (NCT03031769).

METHODS

Socio-demographic, socio-economic and disease characteristics data were collected from patients' medical records as part of a routine visit to their primary care practice or pulmonologist. Dedicated questionnaires were used to evaluate respiratory symptoms for each part of the day. PAL was assessed by means of self- and interview-reported tools, and physician's judgment. Patients were also classified according to GOLD recommendations 2013 and 2017.

RESULTS

Overall, 102 Belgian patients participated in the study (mean age 67 years, 60.8% males). Over 85% of patients experienced respiratory symptoms throughout the day and about one-third were considered as 'active' (PAL ≥150 minutes/week). Physician-assessed PALs were higher than self-reported PALs, categorizing fewer patients as 'inactive' (17.6% versus 42.2%, respectively). PALs and symptoms were weakly interrelated. Inactive patients were present in all GOLD classification groups.

CONCLUSION

Stable Belgian COPD patients enrolled in the SPACE study presented 24-hour respiratory symptoms and insufficient PALs. Physicians tended to overestimate patients' physical activity. Inactive patients were present across all GOLD classification groups. New approaches are deemed necessary to objectively identify and activate sedentary patients.

Does Telemedicine Promote Physical Activity?

Exercise capacity and physical activity are different concepts: the former refers to what an individual is capable of performing, while the latter refers to what the individual does in daily life. Low levels of physical activity (PA), which are very common in individuals with COPD, are associated with poor health outcomes, including increased symptoms, a more rapid decline in lung function, increased health care utilization and increased mortality risk. Because of these pervasive negative outcomes, attempts have been made to increase physical activity in individuals with COPD, hoping that success in this area will mitigate the negative effects of inactivity. Based on its ability to increase exercise capacity and reduce dyspnea in COPD and other chronic respiratory diseases, pulmonary rehabilitation (PR) would be expected also increase physical activity in these patients. However, accessibility to pulmonary rehabilitation programs is problematic in some areas, and studies testing its effectiveness in this outcome area have had inconsistent results. Using telehealth interventions using technology to provide medical care conveniently over a distance would have the benefit of reaching a larger proportion of individuals with COPD. A systematic review of clinical trials testing telehealth to promote physical activity had mixed results and low-certainty evidence, resulting in the inability to recommend any single type of intervention. Thus, using telehealth interventions to promote physical activity for individuals with chronic respiratory diseases, while promising, remains an area where future investigations are needed to identify its optimal modalities and clarify its benefits.

An Exploration of the Application of Step Counter-Based Physical Activity Promotion Programs in Patients With Chronic Obstructive Pulmonary Disease: A Systematic Review

Objective: This paper aimed to systematically review the application methods and components of step counter-based physical activity (PA) promotion programs in patients with chronic obstructive pulmonary disease (COPD). The effects of longer-duration (≥12 weeks) programs on PA, exercise capacity, quality of life, and dyspnea were discussed.

Methods: This review was performed in accordance with the preferred reporting items for systematic reviews and meta-analysis. Online data resources PubMed, Web of Science, Embase, and EBSCO were searched. The publication year was limited between January 2000 to August 2020. All randomized controlled trials with ≥12-week duration of step counter-based PA promotion programs of COPD were included. Two researchers independently assessed the quality of the included studies and extracted their characteristics.

Results: Nine studies involving 1,450 participants were included. Step counters, counseling, exercise goals, diaries, and tele-communicational approaches were common components of these programs. The PA feedback tools were mostly pedometers (n = 8), whereas accelerometers were often used as assessment tools of PA (n = 5). All studies implemented counseling: five applied behavioral change theories, and three reported motivational interview techniques simultaneously. Six studies reported detailed exercise goals. The usual exercise goal was to reach a total of 8,000–10,000 steps/day. Three research studies used diaries, and five applied tele-communication approaches to deliver interventions. The programs could be implemented alone (n = 4), in combination with exercise training (n = 2), or with pulmonary rehabilitation (n = 2). All studies showed a significant increase in the PA (≥793 steps/day). Three studies observed a significant improvement in exercise capacity (≥13.4 m), and two reported a significant increase in the quality of life (p < 0.05). No study showed significant between-group differences in dyspnea.

Conclusion: There are a few studies assessing the impact of long-duration (≥12 weeks) step counter-based interventions in COPD, with different methodologies, although all studies included counseling and exercise goal setting. These interventions seem to have a positive effect on PA. A few studies also showed benefit on exercise capacity and quality of life.

Resting Breathing Instability During Wakefulness as a Predictor of Clinical Outcome in COPD

BACKGROUND

Dyspnea is a common symptom in patients with COPD. It causes physical inactivity and impaired health-related quality of life. Although optimal breathing methods alleviate dyspnea, it is unclear whether breathing instability has a clinical impact on patients with COPD. This study aimed to investigate whether resting breathing instability during wakefulness was associated with dyspnea assessed by the modified Medical Research Council (mMRC) dsypnea scale and whether breathing instability can be a novel predictor of clinical outcomes.

METHODS

Forty-four subjects with stable COPD were enrolled (mean age, 71.0 y). Resting breathing was monitored for 15 min by using respiratory inductance plethysmography. Breathing instability was evaluated with the coefficient of variation for breath-by-breath respiratory duration and tidal volume ([Formula: see text]) by using an artifact-free respiratory signal for 5 min. Pulmonary function testing and blood gas analysis were performed (mean FEV₁ percent of predicted, 68.5%). Questionnaires with regard to dyspnea and health-related quality of life were also completed. Exacerbations were recorded prospectively for 1 year after the initial assessment.

RESULTS

The coefficients of variation for [Formula: see text] were significantly higher in the subjects with an mMRC dyspnea scale score ≥ 2 versus those with an mMRC dyspnea scale score < 2 (26.4 ± 7.4% vs 20.3 ± 6.4%, P = .006) . The coefficients of variation for respiratory duration and V_T were not associated with age, body mass index, and pulmonary function variables. In multivariate analysis, FEV₁ percent of predicted and coefficient of variation for [Formula: see text] remained significant predictors for an mMRC dyspnea scale score ≥ 2 (P = .004 and P = .01, respectively). Coefficient of variation values were also correlated with several health-related quality of life domains. The exacerbation frequency was associated with the coefficient of variation for [Formula: see text].

CONCLUSIONS

Resting breathing pattern during wakefulness is a novel assessment tool for severity of dyspnea, which can be one of the predictors for exacerbation in patients with COPD.

Static and dynamic balance impairment and relationship with disease-related factors in patients with chronic obstructive pulmonary disease : A cross-sectional study

BACKGROUND

Disease and aging-related factors may predispose chronic obstructive pulmonary disease (COPD) patients to impaired balance, although the underlying determinants of impaired balance in COPD patients are still unknown. The purpose of this study was to identify the determinants of impaired balance in COPD patients. Also, we aimed to determine which balance measures (clinical or laboratory tests) are more indicative in determining balance impairment in these patients.

METHODS

This cross-sectional study recruited 24 patients with moderate to severe COPD and 24 age-matched healthy subjects. Participants were evaluated regarding demographic and clinical data, previous falls history, lower limb muscle strength, exercise capacity, physical activity and balance level.

RESULTS

COPD patients exhibited significantly a longer test duration on timed up and go test, a higher sway index on the postural stability and lower directional control score on the limit of stability of Biodex balance system (all, p < 0.001) compared to healthy controls, whereas there was no difference in Berg balance scale score between groups (p > 0.05). Balance impairment of the patient group was significantly associated with nonpulmonary conditions, such as physical activity level, exercise capacity, lower limb muscle strength, and with fall history. Also, COPD patients represented significantly lower physical activity level and exercise capacity, weaker lower limb muscle strength than healthy controls (all, p < 0.001).

CONCLUSIONS

Patients with moderate to severe COPD exhibit apparently important reductions in balance control that is directly associated with nonpulmonary consequences and fall history. These results may be extremely important to fall prevention and to guide the development of interventions for this population.

Pulmonary function with expiratory resistive loading in healthy volunteers

Expiratory flow limitation is a key characteristic in obstructive pulmonary diseases. To study abnormal lung mechanics isolated from heterogeneities of obstructive disease, we measured pulmonary function in healthy adults with expiratory loading. Thirty-seven volunteers (25±5 yr) completed spirometry and body plethysmography under control and threshold expiratory loading of 7, 11 cmH2O, and a subset at 20 cmH2O (n = 11). We analyzed the shape of the flow-volume relationship with rectangular area ratio (RAR; Ma et al., Respir Med 2010). Airway resistance was increased (p<0.0001) with 7 and 11 cmH2O loading vs control (9.20±1.02 and 11.76±1.68 vs. 2.53± 0.80 cmH2O/L/s). RAR was reduced (p = 0.0319) in loading vs control (0.45±0.07 and 0.47±0.09L vs. 0.48±0.08). FEV1 was reduced (p<0.0001) in loading vs control (3.24±0.81 and 3.23±0.80 vs. 4.04±1.05 L). FVC was reduced (p<0.0001) in loading vs control (4.11±1.01 and 4.14±1.03 vs. 5.03±1.34 L). Peak expiratory flow (PEF) was reduced (p<0.0001) in loading vs control (6.03±1.67 and 6.02±1.84 vs. 8.50±2.81 L/s). FEV1/FVC (p<0.0068) was not clinically significant and FRC (p = 0.4) was not different in loading vs control. Supra-physiologic loading at 20 cmH2O did not result in further limitation. Expiratory loading reduced FEV1, FVC, PEF, but there were no clinically meaningful differences in FEV1/FVC, FRC, or RAR. Imposed expiratory loading likely leads to high airway pressures that resist dynamic airway compression. Thus, a concave expiratory flow-volume relationship was consistently absent-a key limitation for model comparison with pulmonary function in COPD. Threshold loading may be a useful strategy to increase work of breathing or induce dynamic hyperinflation.

Comorbidity in chronic obstructive pulmonary disease and cardiovascular disease

Comorbidity is one of the most significant problems of modern healthcare. Numerous studies have analyzed the possible pathogenetic mechanisms and relationships between a wide variety of diseases. Cardiovascular (CVD) and pulmonary diseases, in particular chronic obstructive pulmonary disease (COPD), have a number of the same risk factors and pathogenetic links, which aggravate each other's course. Moreover, CVD and COPD are among the most common diseases in the world. This review provides up-to-date information on the prevalence, risk factors and pathophysiological mechanisms underlying this unfavorable combination of diseases. Some problems of diagnosis and treatment of patients with COPD and CVD are also discussed.

Effect of the trajectory of exertional breathlessness on symptom recall and anticipation: A randomized controlled trial

Background

Breathlessness is a major cause of physical limitation. Recalled breathlessness intensity may differ from experienced intensity and be influenced by the intensity trajectory including the ‘peak-end rule’. The primary aim was to test if adding two minutes of low intensity exercise at the end of an exercise test would change the recalled breathlessness. Secondary aims included to analyse the impact of the peak and end exertional breathlessness intensity on breathlessness recall.

Methods

Randomized controlled trial of 92 adults referred for exercise testing who were randomized (1:1), at test end, to 2 minutes of additional low intensity exercise (intervention; n = 47) or stopping at peak exertion (control; n = 45). Experienced breathlessness during the test and recalled intensity (30 min after the test) was assessed using the Borg CR10 scale.

Results

Participants were aged a mean 59 years; 61% men; 79% reported a mMRC ≥1. There was no between-group difference in recalled breathlessness intensity, 5.51 ([95% CI] 5.00 to 6.01) vs. 5.73 (5.27 to 6.20; p = 0.52) in controls, even though the intervention group had a significantly lower end breathlessness (mean difference 0.96; 0.24 to 1.67; p = 0.009). Recalled exertional breathlessness was most strongly related to peak breathlessness (r² = 0.43). When analyzed together, end breathlessness did not add any explanatory value above that of peak breathlessness.

Conclusion

Adding an episode of two minutes of lower exercise and breathlessness intensity at the end of an exercise test did not affect symptom recall, which was most strongly related to peak breathlessness intensity.

Trial registration

ClinicalTrials.gov (NCT03468205).

COMBORIDITY OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE AND CARDIOVASCULAR DISEASES: GENERAL FACTORS, PATHOPHYSIOLOGICAL MECHANISMS AND CLINICAL SIGNIFICANCE

Currently, the comorbidity (combination) of chronic obstructive pulmonary disease (COPD) and cardiovascular diseases (CVD) is an relevant problem for health care. This is due to the high prevalence and continued growth of these pathologies. CVD and COPD have common risk factors and mechanisms underlying their development and progression: smoking, inflammation, sedentary lifestyle, aging, oxidative stress, air pollution, and hypoxia. In this review, we summarize current knowledge relating to the prevalence and frequency of cardiovascular diseases in people with COPD and the mechanisms that underlie their coexistence. The implications for clinical practice, in particular the main problems of diagnosis and treatment of COPD/CVD comorbidity, are also discussed.

The difference in risk of chronic pulmonary disease morbidity and mortality between former elite athletes and ordinary men in Finland

The impact of a history of competitive sports on later smoking behaviour and occurrence of chronic pulmonary diseases is poorly known. We investigated how a history of elite level sports predicted later pulmonary disease morbidity and mortality. Chronic pulmonary disease incidence was assessed from national hospital and cause-of-death registers from 1970 to 2015 among Finnish male former elite athletes (n = 2078) and matched controls (n = 1453) alive in 1970 (mean age 45.0 years). Hazard ratios (HRs) were calculated by Cox proportional hazards model. In 1985, cohort members reported on their smoking habits, engagement in physical activity/sports and physician-diagnosed chronic diseases. The risk of any chronic pulmonary disease or death was lower among former athletes than controls (age-adjusted HR 0.61; 95% CI 0.46-0.83). The risk was significantly lower among endurance (HR 0.54), mixed (HR 0.61), and power sports athletes (HR 0.66) compared to controls. The age- and smoking pack-year-adjusted HRs of incident diseases from the time of the 1985 questionnaire until the end of follow-up in former athletes was 0.58 (95% CI 0.37-0.93) compared to controls. In 1985 athletes smoked less and their cumulative smoking quantity was lower than that of controls. Former athletes were more physically active and self-reported less physician-diagnosed emphysema. The risk of any chronic pulmonary disease was lower among former athletes than controls even after considering smoking status and cumulative smoking quantity. Ability to compete at the highest level of sports in young adulthood associated with a reduced risk of pulmonary disease in later life.

Consistency and reliability of smoking-related variables: longitudinal study design in asthma and COPD

Introduction: Smoking has a significant impact on the development and progression of asthma and chronic obstructive pulmonary disease (COPD). Self-reported questionnaires and structured interviews are usually the only way to study patients' smoking history. In this study, we aim to examine the consistency of the responses of asthma and COPD patients to repeated standardised questions on their smoking habits over the period of 10 years. Methods: The study population consisted of 1329 asthma and 959 COPD patients, who enrolled in the study during years 2005-2007. A follow-up questionnaire was mailed to the participants 1, 2, 4, 6, 8, and 10 years after the recruitment. Results: Among the participants who returned three or more questionnaires (N = 1454), 78.5 % of the patients reported unchanged smoking status (never smoker, ex-smoker or current smoker) across the time. In 4.5% of the answers, the reported smoking statuses were considered unreliable/conflicting (first never smoker and, later, smoker or ex-smoker). The remainder of the patients changed their status from current smoker to ex-smoker and vice versa at least once, most likely due to struggling with quitting. COPD patients were more frequently heavy ex- or current smokers compared to the asthma group. The intraclass coefficient correlations between self-reported starting (0.85) and stopping (0.94) years as well as the consumption of cigarettes (0.74) over time showed good reliability among both asthma and COPD patients. Conclusion: Self-reported smoking data among elderly asthma and COPD patients over a 10-year follow-up is reliable. Pack years can be considered a rough estimate for their comprehensive consumption of tobacco products over time. We also observed that the questionnaire we used was not designed for dynamic changes in smoking which are rather common among heavy smokers especially when the follow-up time is several years, as in our study.

Subterranean Pulmonary Rehabilitation in Chronic Obstructive Pulmonary Disease

Pulmonary rehabilitation (PR) has been recommended as an integral part of treatment for patients with chronic obstructive pulmonary disease (COPD). Climate therapy in salt mine chambers has been found of benefit in chronic respiratory diseases. The study compares long-term effects of underground PR in the Wieliczka Salt Mine with that conducted on the surface. There were 42 COPD patients enrolled in the study, with FEV₁/FVC <0.7 predicted and post-bronchodilator reversibility <12%, randomized into pulmonary rehabilitation in the mine (Group I, n = 23) and PR on the surface (Group II, n = 19). The outcomes consisted of lung function variables, exercise performance (6-min walk test - 6MWT), dyspnea (mMRC), and compliance with the disease and quality of life (COPD Assessment Test - CAT) and BODE index, compared at baseline (P0), end (P1), and 6 months after pulmonary rehabilitation (P2). The findings were that subterranean pulmonary rehabilitation significantly reduced CAT score (p < 0.001), BODE index (p = 0.004), and dyspnea (mMRC) (p = 0.001) and increased distance in 6MWT (p < 0.001), compared with its equivalent conducted on the surface. Further, beneficial effect of subterranean treatment was sustained during the following half a year as opposed to the effect noticed on patients treated on the surface. We conclude that subterranean pulmonary rehabilitative treatment reduces symptoms and improves exercise tolerance to a greater and sustained extent, compared to a similar treatment on the surface, in patients suffering from COPD.

The relationship between fear of movement, pain and fatigue severity, dyspnea level and comorbidities in patients with chronic obstructive pulmonary disease

Purpose: Dyspnea, sedentary lifestyle, and comorbid diseases may reduce the desire to engage in physical movement in chronic obstructive pulmonary disease (COPD). The aims of this study were to assess levels of kinesiophobia among stable COPD patients and evaluate the relationship between kinesiophobia and pain and fatigue severity, dyspnea level, and comorbidities in this patient group. Material and Methods: Thirty-one patients with moderate/severe COPD and thirty-one age- and sex-matched healthy controls participated in the study. All participants were assessed using Visual Analog Scale for pain severity, Fatigue Severity Scale, modified Medical Research Council Dyspnea Scale, Charlson Comorbidity Index, and Tampa Scale of Kinesiophobia. Results: Ninety-three percent of the patients with COPD had a high degree of kinesiophobia (Tampa Scale of Kinesiophobia score >37). The modified Medical Research Council Dyspnea Scale, Charlson Comorbidity Index, and Tampa Scale of Kinesiophobia scores of patients with COPD was significantly higher than those of healthy subjects (p < 0.001). Tampa Scale of Kinesiophobia score was significantly associated with modified Medical Research Council Dyspnea Scale score (r = 0.676, p < 0.001), Charlson Comorbidity Index score (r = 0.746, p < 0.001) and fatigue severity level (r = 0.524, p = 0.005). Conclusion: Most moderate/severe COPD patients express fear of movement. Kinesiophobia is strongly associated with dyspnea perception, fatigue severity, multisystemic comorbidities in COPD. Further studies are needed to determine the effects of kinesiophobia on the success of pulmonary rehabilitation. Implications for rehabilitation Most of moderate-to-severe chronic obstructive pulmonary disease patients have fear of movement. Increase fear of movement in moderate-severe chronic obstructive pulmonary disease is associated with increased dyspnea perception and fatigue severity and multisystemic comorbidities.

Estimating the effectiveness of pulmonary rehabilitation for COPD exacerbations: reduction of hospital inpatient days during the following year

AIMS

To study the short- and long-term results of pulmonary rehabilitation (PR) given in the Helsinki University Heart and Lung Center and to understand the hospital resources used to treat severe COPD exacerbations in the city of Helsinki.

MATERIALS AND METHODS

Seventy-eight inactive patients with severe COPD were recruited for a PR course; three of them did not finish the course. The course took 6-8 weeks and included 11-16 supervised exercise sessions. Using electronic medical records, we studied all COPD patients with hospital admission in the city of Helsinki in 2014, including COPD diagnosis, criteria for exacerbation, and potential exclusion/inclusion criteria for PR.

RESULTS

Seventy-five of the patients finished the PR course and 92% of those patients showed clinically significant improvement. Their hospital days were reduced by 54% when compared to the year before. At 1 year after the course, 53% of the patients reported that they have continued with regular exercise training. In the city of Helsinki, 437 COPD patients were treated in a hospital due to exacerbation during 2014. On the basis of their electronic medical records, 57% of them would be suitable for PR. According to a rough estimate, 10%-20% hospital days could be saved annually if PR was available to all, assuming that the PR results would be as good as those shown here.

CONCLUSIONS

The study showed that in a real-world setting, PR is efficient when measured by saved hospital days in severe COPD. Half of the patients could be motivated to continue exercising on their own.

Reliability and validity of the Chinese version of the Breathlessness Beliefs Questionnaire

The aim of this article is to evaluate the reliability and validity of the Chinese version of the Breathlessness Beliefs Questionnaire (BBQ) for use among patients with respiratory diseases in China. The BBQ is an instrument for assessing specific dyspnoea-related fears and may have predictive value for chronic obstructive pulmonary disease outcomes beyond general anxiety measures. This instrument has not previously been translated into Chinese or tested in mainland China. This was a cross-sectional validation study with a 1-week test of reproducibility. A total of 252 Chinese patients with respiratory diseases recruited from pulmonary outpatient and inpatient departments completed the BBQ. Demographic characteristics, pulmonary function and degree of dyspnoea were also measured. Cronbach's α was 0.82 for the total BBQ score; 0.72 for the somatic focus subscale and 0.73 for the activity avoidance subscale. Test-retest reliability was satisfactory, with intraclass correlation coefficient scores for the BBQ overall and for each subscale ranging from 0.96 to 0.98 ( p < 0.001). After exploratory factor analyses, the Chinese version of the BBQ was found to be similar to the original Dutch version. The Chinese version of the BBQ is a reliable tool to assess dyspnoea-related fear in patients with respiratory diseases in mainland China.

Self-reported daily walking time in COPD: relationship with relevant clinical and functional characteristics

Background

Quantifying physical activity in chronic obstructive pulmonary disease (COPD) is important as physical inactivity is related to poor health outcomes. This study analyzed the relationship between patients’ self-reported daily walking time and relevant characteristics related to COPD severity.

Methods

Pooled analysis was performed on data from four observational studies on which daily walking time was gathered from a personal interview. Patients were classified as physically inactive if walking time was <30 min/day. Walking times were described and compared according to several markers of disease severity.

Results

The mean daily walking time of 5,969 patients was 66 (standard deviation [SD] 47) min/day; 893 (15%) patients were inactive. A linear dose–response relationship was observed between walking time and the modified Medical Research Council (mMRC) dyspnea score, admissions, COPD assessment test (CAT), body mass index, airway obstruction, dyspnea, exacerbation (BODEx) index, and Charlson index (P<0.001). Daily walking times were lower in patients classified as Global Initiative for Chronic Obstructive Lung Disease (GOLD) B and D (P<0.001). Often, inactive patients had mMRC or Charlson index >3, post-bronchodilator forced expiratory volume in the first second <30% predicted, at least one hospitalization for COPD, classified as GOLD B or D, BODEx >4, and CAT score >30.

Conclusion

Lower self-reported walking times are related to worse markers of disease severity in COPD.

Association between morning symptoms and physical activity in COPD: a systematic review

Morning symptoms are common in chronic obstructive pulmonary disease (COPD). Many COPD patients consider the morning as the most troublesome part of the day, in which they experience more symptoms and physical activity limitations.To systematically report evidence of the association between morning symptoms and physical activity in COPD patients, a literature search was conducted using relevant MESH terms and text words in PubMed, Embase, Web of Science, COCHRANE, CINAHL and PsycINFO. Quality of the articles was assessed with validated checklists.Eight studies were included. Morning symptoms were present in 39.8-94.4%. In 37.0-90.6% of all COPD patients, there was an association between physical activity and morning symptoms. However, causality could not be proved. Morning symptoms were associated with a sedentary lifestyle (p<0.05). Treatment in line with the guidelines improved the degree of activity limitations due to morning symptoms (p<0.0001).Across all disease stages, COPD patients experience morning symptoms which are negatively associated with physical activity. Physicians should consider morning symptoms as a treatment goal. Pharmacotherapy may improve the degree of activity limitations due to morning symptoms. More objective research should focus on symptoms, activity limitations and physical inactivity of COPD patients, especially in the morning.

Occupational Risk Factors for COPD: A Case-Control Study

OBJECTIVES

The aim of this research was to examine the occupational risk factors for Chronic Obstructive Pulmonary Diseases (COPD) in a range of occupations.

METHODS

Eleven occupations involving different types of exposure were observed in this multicenter case-control study. Controls and cases were matched for sex, age and smoking. Multiple logistic regression analyses were used to estimate odds ratios (ORs).

RESULTS

A total of 1,519 participants were initially recruited between September 2004 and September 2012. After matching, 547 pairs were obtained. The mean age was 56.3 +/- 10.4 years. Smelter workers were the only ones with an increased risk of COPD in this study (OR = 7.6, p < 0.0001, 95% CI [4.5, 12.9]). Physical activity was protective (OR = 0.7), while living in the city was a risk (OR = 1.6). The main used metals were cast iron, aluminum and alloys. Molds and cores were mainly made from sand and synthetic resins. Machine maintenance (65.2%), molding (49.6%), finishing (41.1%) and casting (41.0%) were the most common activities. Almost all workers (95.1%) cleaned the floors and machines with a brush or compressed air.

CONCLUSIONS

This study demonstrates the importance of occupational factors in the genesis of COPD, especially among smelter workers. As with the fight against smoking-related disease, the removal or substitution of recognized hazardous agents is the best way of preventing the onset of COPD. This is why it is essential to continue research on its occupational risk factors.

Individual FEV1 Trajectories Can Be Identified from a COPD Cohort

OBJECTIVE

We aim to make use of clinical spirometry data in order to identify individual COPD-patients with divergent trajectories of lung function over time.

STUDY DESIGN AND SETTING

Hospital-based COPD cohort (N = 607) was followed on average 4.6 years. Each patient had a mean of 8.4 spirometries available. We used a Hierarchical Bayesian Model (HBM) to identify the individuals presenting constant trends in lung function.

RESULTS

At a probability level of 95%, one third of the patients (180/607) presented rapidly declining FEV1 (mean -78 ml/year, 95% CI -73 to -83 ml) compared to that in the rest of the patients (mean -26 ml/year, 95% CI -23 to -29 ml, p ≤ 2.2 × 10(-16)). Constant improvement of FEV1 was very rare. The rapid decliners more frequently suffered from exacerbations measured by various outcome markers.

CONCLUSION

Clinical data of unique patients can be utilized to identify diverging trajectories of FEV1 with a high probability. Frequent exacerbations were more prevalent in FEV1-decliners than in the rest of the patients. The result confirmed previously reported association between FEV1 decline and exacerbation rate and further suggested that in clinical practice HBM could improve the identification of high-risk individuals at early stages of the disease.

Low bone mineral density in COPD patients with osteoporosis is related to low daily physical activity and high COPD assessment test scores

COPD patients have an increased prevalence of osteoporosis (OP) compared with healthy people. Physical inactivity in COPD patients is a crucial risk factor for OP; the COPD assessment test (CAT) is the newest assessment tool for the health status and daily activities of COPD patients. This study investigated the relationship among daily physical activity (DPA), CAT scores, and bone mineral density (BMD) in COPD patients with or without OP. This study included 30 participants. Ambulatory DPA was measured using actigraphy and oxygen saturation by using a pulse oximeter. BMD was measured using dual-energy X-ray absorptiometry. OP was defined as a T-score (standard deviations from a young, sex-specific reference mean BMD) less than or equal to −2.5 SD for the lumbar spine, total hip, and femoral neck. We quantified oxygen desaturation during DPA by using a desaturation index and recorded all DPA, except during sleep. COPD patients with OP had lower DPA and higher CAT scores than those of patients without OP. DPA was significantly positively correlated with (lumbar spine, total hip, and femoral neck) BMD (r=0.399, 0.602, 0.438, respectively, all P<0.05) and T-score (r=0.471, 0.531, 0.459, respectively, all P<0.05), whereas CAT scores were significantly negatively correlated with (total hip and femoral neck) BMD (r=−0.412, −0.552, respectively, P<0.05) and (lumbar spine, total hip, and femoral neck) T-score (r=−0.389, −0.429, −0.543, respectively, P<0.05). Low femoral neck BMD in COPD patients was related to high CAT scores. Our results show no significant difference in desaturation index, low SpO₂, and inflammatory markers (IL-6, TNF-α, IL-8/CXCL8, CRP, and 8-isoprostane) between the two groups. Chest physicians should be aware that COPD patients with OP have low DPA and high CAT scores.

Improvements in patient-reported outcomes: A prospective, non-interventional study with aclidinium bromide for treatment of COPD

BACKGROUND

The inhaled long-acting muscarinic antagonist aclidinium bromide has been shown to significantly improve lung function parameters and symptom severity in patients with COPD in randomised placebo- and active-controlled clinical studies. To obtain a comprehensive view of the treatment effects, patient-reported outcomes were investigated in a real-life COPD population in routine clinical practice in Austria.

METHODS

Multicentre, prospective, non-interventional study in patients with COPD who were newly initiated on treatment with Eklira® Genuair® (aclidinium bromide; recommended dose 400 μg twice daily) as first-line or add-on therapy. Patients were either treatment naïve or switched from other COPD medications. Health-related quality of life by means of the COPD Assessment Test™ (CAT) and symptom-related variables were evaluated at the first visit (baseline) and after approximately 12 weeks of treatment. Features of the inhaler were assessed by patients and physicians at the follow-up visit.

RESULTS

A total of 795 COPD patients (56% male; median age: 64 years) were enrolled and treated. During the observational period, the proportion of patients with at least moderate nighttime symptoms, early-morning symptoms, and limitations in morning activities decreased from 45.0% to 21.4%, from 57.7% to 26.0%, and from 49.9% to 25.3%, respectively. All improvements from baseline in symptom severity and activity limitation were statistically significant (p < 0.0001, all tests). The mean (±SD) frequency of nocturnal awakenings decreased from 1.2 (±1.4) to 0.7 (±1.2) times per night (p < 0.0001). Quality of life improved significantly in patients treated with aclidinium bromide over 3 months compared to baseline (p < 0.0001; mean CAT total score: 18.5 ± 7.5 vs. 13.8 ± 7.3). Up to 90% of the patients and up to 91% of the physicians assessed individual features of the inhaler as 'very good' or 'good'. Aclidinium bromide was well tolerated; 6.9% of the patients reported adverse drug reactions, none of which were serious.

CONCLUSIONS

This non-interventional study indicated beneficial effects of Eklira® Genuair® in the treatment of COPD with regard to nighttime and early-morning symptoms, limitation of morning activities, and quality of life under routine conditions. The acceptance of the inhaler device was high, which is a prerequisite to ensure adherence in long-term therapy.

An official European Respiratory Society statement on physical activity in COPD

This European Respiratory Society (ERS) statement provides a comprehensive overview on physical activity in patients with chronic obstructive pulmonary disease (COPD). A multidisciplinary Task Force of experts representing the ERS Scientific Group 01.02 "Rehabilitation and Chronic Care" determined the overall scope of this statement through consensus. Focused literature reviews were conducted in key topic areas and the final content of this Statement was agreed upon by all members. The current knowledge regarding physical activity in COPD is presented, including the definition of physical activity, the consequences of physical inactivity on lung function decline and COPD incidence, physical activity assessment, prevalence of physical inactivity in COPD, clinical correlates of physical activity, effects of physical inactivity on hospitalisations and mortality, and treatment strategies to improve physical activity in patients with COPD. This Task Force identified multiple major areas of research that need to be addressed further in the coming years. These include, but are not limited to, the disease-modifying potential of increased physical activity, and to further understand how improvements in exercise capacity, dyspnoea and self-efficacy following interventions may translate into increased physical activity. The Task Force recommends that this ERS statement should be reviewed periodically (e.g. every 5-8 years).

COPD is associated with cognitive dysfunction and poor physical fitness in heart failure

OBJECTIVE

To examine the associations among chronic obstructive pulmonary disease (COPD), cognitive function, and physical fitness in heart failure (HF).

BACKGROUND

Cognitive impairment in HF in part stems from medical comorbidities and poor physical fitness. COPD, a frequent co-existing condition in HF, is a risk factor for cognitive impairment and a known cause of poor physical fitness. Yet, the interplay among COPD, cognition, and physical fitness has never been examined in HF.

METHODS

191 HF patients completed a cognitive test battery and brief physical fitness assessment. Diagnostic history of COPD was ascertained via medical chart review.

RESULTS

Regression analyses showed HF patients with COPD exhibited worse attention/executive function and poorer fitness relative to their non-COPD counterparts. Worse fitness correlated with cognitive dysfunction.

CONCLUSIONS

COPD is associated with reduced cognition and worse fitness in HF. Longitudinal work that employs objective assessments of COPD is needed to determine directionality and clarify mechanisms.

Physical Activity Monitoring in Patients with Chronic Obstructive Pulmonary Disease

Reduced physical activity (PA) in patients with chronic obstructive pulmonary disease (COPD) is associated with increased morbidity and mortality (e.g. exacerbations) and eventually leads to disability, depression, and social and physical isolation. Measuring PA in this population is important to accurately characterize COPD and to help clinicians during a baseline evaluation and patient follow-up. Also, it may help increase adherence to PA programs. There are reliable objective and subjective methods available to measure PA. Recently, several new monitors have been developed that have improved accuracy of such measurements. Because these devices provide real-time feedback, they may help to improve participant self-motivation strategies and reinforce daily lifestyle modifications, one of the main goals in COPD management. This review focuses on describing available instruments to measure PA, specifically in patients with COPD. The reliability, validity, advantages, limitations, and clinical applications of questionnaires, pedometers, and accelerometers are discussed. Finally, based on current published literature, we propose recommendations about which methods may be most useful in different research or clinical settings.

[Chronic obstructive pulmonary disease: Morbimortality and healthcare burden]

Chronic obstructive pulmonary disease (COPD) is an enormous public health problem and of growing importance due to its high prevalence, elevated morbimortality, and socioeconomic costs. Many Spanish epidemiological studies report a prevalence of 10% of the adult population, with its growth appearing to have stabilised. Nevertheless, over 75% of cases are still underdiagnosed. The diagnosis of mild and moderate obstruction is associated with a higher survival and lower costs (14 years and €9,730) compared to 10 years survival and €43,785 of patients diagnosed in the severe obstruction phase. COPD was the fourth cause of death in Spain in 2011, although the adjusted mortality rates have decreased more than 20% in the last decade, particularly in males. Patients with advanced COPD die from it, but patients with mild or moderate COPD die due to cardiovascular diseases or cancer (mainly of the lung). It is estimated that the annual cost of the disease is around 3,000 million Euros. These increase with the spirometric severity, and is mainly associated with exacerbations (almost 60% of the direct costs). Comorbidity, that is the presence of diseases that coexist with the studied disease, is higher in patients with COPD than in the general population and affects health results.

Motivational cues as real-time feedback for changing daily activity behavior of patients with COPD

OBJECTIVE

To investigate how COPD patients respond to motivational cues that aim to improve activity behavior and how these responses are related to cue- and context characteristics. In addition, to explore whether activity can be increased and better distributed over the day by providing such cues.

METHODS

Fifteen COPD patients participated. Patients used an activity sensor with a smartphone for four weeks, at least four days/week. Patients received motivational cues every 2h with advice on how to improve their activity, on top of real-time visual feedback. The response was calculated by the amount of activity 30 min before and after a cue.

RESULTS

In total, 1488 cues were generated. The amount of activity significantly decreased in the 30 min after a discouraging cue (p<0.001) and significantly increased (p<0.05) in the 10 min after an encouraging cue. The activity level increased with 13% in the intervention period compared to corrected baseline (p=0.008). The activity was not more balanced over the day.

CONCLUSIONS

COPD patients significantly change their activity level in response to motivational cues, based on continuous ambulatory assessment of activity levels.

PRACTICE IMPLICATIONS

Motivational cues could be a valuable component of telemedicine interventions that aim to improve activity behavior.

A 1-year follow-up study exploring the associations between perception of illness and health-related quality of life in persons with chronic obstructive pulmonary disease

Chronic obstructive pulmonary disease (COPD) is a progressive respiratory disease with an increasing prevalence worldwide. Its potential consequences, including reduced function and reduced social participation, are likely to be associated with decreased health-related quality of life (HRQoL). However, illness perceptions and self-efficacy beliefs may also play a part in determining HRQoL in persons with COPD. The aim of this study was to explore the relationships between illness perceptions, self-efficacy, and HRQoL in a sample of persons with COPD in a longitudinal perspective. The context of the study was a patient education course from which the participants were recruited. Data concerning sociodemographic variables, social support, physical activity, illness perceptions, general self-efficacy, and HRQoL were collected before the course started and 1 year after completion. Linear regression was used in the analyses. The results showed that less consequences and less symptoms (identity) were associated with higher physical HRQoL (PCS) at baseline and at 1-year follow-up. Less emotional response was similarly associated with higher mental HRQoL (MCS) at both time points. Lower self-efficacy showed a borderline significant association with higher PCS at baseline, but was unrelated to MCS at both time points. Self-efficacy showed no influence on the associations between illness perceptions and HRQoL. In conclusion, the study showed that specific illness perceptions had a stable ability to predict HRQoL in persons with COPD, whereas self-efficacy did not. The associations between illness perceptions and HRQoL were not mediated by self-efficacy.

A telerehabilitation intervention for patients with Chronic Obstructive Pulmonary Disease: a randomized controlled pilot trial

OBJECTIVE

First, to investigate the effects of a telerehabilitation intervention on health status and activity level of patients with Chronic Obstructive Pulmonary Disease (COPD), compared to usual care. Second, to investigate how patients comply with the intervention and whether compliance is related to treatment outcomes.

DESIGN

a randomized controlled pilot trial

SUBJECTS

Thirty-four patients diagnosed with COPD.

INTERVENTION

The telerehabilitation application consists of an activity coach (3D-accelerometer with smartphone) for ambulant activity registration and real-time feedback, complemented by a web portal with a symptom diary for self-treatment of exacerbations. The intervention group used the application for 4 weeks. The control group received usual care.

MAIN MEASURES

Activity level measured by a pedometer (in steps/day), health status by the Clinical COPD Questionnaire at baseline and after intervention. Compliance was expressed as the time the activity coach was worn.

RESULTS

Fourteen intervention and 16 control patients completed the study. Activity level (steps/day) was not significantly affected by the intervention over time. There was a non-significant difference in improvement in health status between the intervention (-0.34±0.55) and control group (0.02±0.57, p=0.10). Health status significantly improved within the intervention group (p=0.05). The activity coach was used more than prescribed (108%) and compliance was related to the increase in activity level for the first two feedback weeks (r=0.62, p=0.03).

CONCLUSIONS

This pilot study shows the potential of the telerehabilitation intervention: compliance with the activity coach was high, which directly related to an improvement in activity levels.

Helping COPD patients change health behavior in order to improve their quality of life

Chronic obstructive pulmonary disease (COPD) is one of the most prevalent and debilitating diseases in adults worldwide and is associated with a deleterious effect on the quality of life of affected patients. Although it remains one of the leading causes of global mortality, the prognosis seems to have improved in recent years. Even so, the number of patients with COPD and multiple comorbidities has risen, hindering their management and highlighting the need for futures changes in the model of care. Together with standard medical treatment and therapy adherence--essential to optimizing disease control--several nonpharmacological therapies have proven useful in the management of these patients, improving their health-related quality of life (HRQoL) regardless of lung function parameters. Among these are improved diagnosis and treatment of comorbidities, prevention of COPD exacerbations, and greater attention to physical disability related to hospitalization. Pulmonary rehabilitation reduces symptoms, optimizes functional status, improves activity and daily function, and restores the highest level of independent physical function in these patients, thereby improving HRQoL even more than pharmacological treatment. Greater physical activity is significantly correlated with improvement of dyspnea, HRQoL, and mobility, along with a decrease in the loss of lung function. Nutritional support in malnourished COPD patients improves exercise capacity, while smoking cessation slows disease progression and increases HRQoL. Other treatments such as psychological and behavioral therapies have proven useful in the treatment of depression and anxiety, both of which are frequent in these patients. More recently, telehealthcare has been associated with improved quality of life and a reduction in exacerbations in some patients. A more multidisciplinary approach and individualization of interventions will be essential in the near future.