Association between blood eosinophil count and risk of readmission for patients with asthma: Historical cohort study.

BACKGROUND: Recent studies have demonstrated an association between high blood eosinophil counts and greater risk of asthma exacerbations. We sought to determine whether patients hospitalized for an asthma exacerbation were at greater risk of readmission if they had a high blood eosinophil count documented before the first hospitalization. METHODS: This historical cohort study drew on 2 years of medical record data (Clinical Practice Research Datalink with Hospital Episode Statistics linkage) of patients (aged ≥5 years) admitted to hospital in England for asthma, with recorded blood eosinophil count within 1 baseline year before admission. We analyzed the association between high blood eosinophil count (≥0.35x109 cells/L) and readmission risk during 1 year of follow-up after hospital discharge, with adjustment for predefined, relevant confounders using forward selection. RESULTS: We identified 2,613 eligible patients with asthma-related admission, of median age 51 years (interquartile range, 36-69) and 76% women (1,997/2,613). Overall, 835/2,613 (32.0%) had a preadmission high blood eosinophil count. During the follow-up year, 130/2,613 patients (5.0%) were readmitted for asthma, including 55/835 (6.6%) with vs. 75/1,778 (4.2%) without high blood eosinophil count at baseline (adjusted hazard ratio [HR] 1.49; 95% CI 1.04-2.13, p = 0.029). The association was strongest in never-smokers (n = 1,296; HR 2.16, 95% CI 1.27-3.68, p = 0.005) and absent in current smokers (n = 547; HR 1.00, 95% CI 0.49-2.04, p = 0.997). CONCLUSIONS: A high blood eosinophil count in the year before an asthma-related hospitalization is associated with increased risk of readmission within the following year. These findings suggest that patients with asthma and preadmission high blood eosinophil count require careful follow-up, with treatment optimization, after discharge.

Posttraumatic Stress Disorder Among Older Patients with Chronic Obstructive Pulmonary Disease.

This study explored (1) the incidence of posttraumatic stress disorder (PTSD) resulting from past trauma among older patients with COPD and (2) whether PTSD and COPD severity would relate to psychiatric co-morbidity and health-related quality of life. Eighty-five older patients completed the Hospital Anxiety and Depression Scale, the Chronic Respiratory Questionnaire, the Posttraumatic Stress Diagnostic Scale and the Medical Outcomes Short Form 12. The results showed that 55, 39 and 6 % had no, partial and full-PTSD respectively. Partial least squares showed that PTSD was significantly correlated with COPD severity which in turn was significantly correlated with health-related quality of life and psychiatric co-morbidity. Mediational analysis showed that the emotional symptoms of COPD mediated between PTSD and the mental health functioning of health-related quality of life and between PTSD and depression. To conclude, PTSD from past trauma was related to the severity of COPD for older patients. In particular, it impacted on the elevated emotional arousal of COPD severity. In turn, COPD severity impacted on older patients' general psychological well-being and depression.

Opportunities to diagnose chronic obstructive pulmonary disease in routine care in the UK: a retrospective study of a clinical cohort.

BACKGROUND: Patterns of health-care use and comorbidities present in patients in the period before diagnosis of chronic obstructive pulmonary disease (COPD) are unknown. We investigated these factors to inform future case-finding strategies. METHODS: We did a retrospective analysis of a clinical cohort in the UK with data from Jan 1, 1990 to Dec 31, 2009 (General Practice Research Database and Optimum Patient Care Research Database). We assessed patients aged 40 years or older who had an electronically coded diagnosis of COPD in their primary care records and had a minimum of 3 years of continuous practice data for COPD (2 years before diagnosis up to a maximum of 20 years, and 1 year after diagnosis) and at least two prescriptions for COPD since diagnosis. We identified missed opportunites to diagnose COPD from routinely collected patient data by reviewing patterns of health-care use and comorbidities present before diagnosis. We assessed patterns of health-care use in terms of lower respiratory consultations (infective and non-infective), lower respiratory consultations with a course of antibiotics or oral steroids, and chest radiography. If these events did not lead to a diagnosis of COPD, they were deemed to be missed opportunities. This study is registered with ClinicalTrials.gov, number NCT01655667. FINDINGS: We assessed data for 38,859 patients. Opportunities for diagnosis were missed in 32,900 (85%) of 38,859 patients in the 5 years immediately preceding diagnosis of COPD; in 12,856 (58%) of 22,286 in the 6-10 years before diagnosis, in 3943 (42%) of 9351 in the 11-15 years before diagnosis; and in 95 (8%) of 1167 in the 16-20 years before diagnosis. Between 1990 and 2009, we noted decreases in the age at diagnosis (0·05 years of age per year, 95% CI 0·03-0·07) and yearly frequency of lower respiratory prescribing consultations (rate ratio 0·982 opportunities per year, 95% CI 0·979-0·985). Prevalence of all comorbidities present at COPD diagnosis increased except for asthma and bronchiectasis, which decreased between 1990 and 2007, from 281 (33·4%) of 842 patients to 451 of 1465 (30·8%) for asthma, and from 53 of 842 (6·3%) to 53 of 1465 (3·6%) for bronchiectasis. In the 2 years before diagnosis, of 6897 patients who had had a chest radiography, only 2296 (33%) also had spirometry. INTERPRETATION: Opportunities to diagnose COPD at an earlier stage are being missed, and could be improved by case-finding in patients with lower respiratory tract symptoms and concordant long-term comorbidities. FUNDING: UK Department of Health, Research in Real Life.

Primary care COPD patients compared with large pharmaceutically-sponsored COPD studies: an UNLOCK validation study.

BACKGROUND: Guideline recommendations for chronic obstructive pulmonary disease (COPD) are based on the results of large pharmaceutically-sponsored COPD studies (LPCS). There is a paucity of data on disease characteristics at the primary care level, while the majority of COPD patients are treated in primary care. OBJECTIVE: We aimed to evaluate the external validity of six LPCS (ISOLDE, TRISTAN, TORCH, UPLIFT, ECLIPSE, POET-COPD) on which current guidelines are based, in relation to primary care COPD patients, in order to inform future clinical practice guidelines and trials. METHODS: Baseline data of seven primary care databases (n=3508) from Europe were compared to baseline data of the LPCS. In addition, we examined the proportion of primary care patients eligible to participate in the LPCS, based on inclusion criteria. RESULTS: Overall, patients included in the LPCS were younger (mean difference (MD)-2.4; p=0.03), predominantly male (MD 12.4; p=0.1) with worse lung function (FEV1% MD -16.4; p<0.01) and worse quality of life scores (SGRQ MD 15.8; p=0.01). There were large differences in GOLD stage distribution compared to primary care patients. Mean exacerbation rates were higher in LPCS, with an overrepresentation of patients with ≥ 1 and ≥ 2 exacerbations, although results were not statistically significant. Our findings add to the literature, as we revealed hitherto unknown GOLD I exacerbation characteristics, showing 34% of mild patients had ≥ 1 exacerbations per year and 12% had ≥ 2 exacerbations per year. The proportion of primary care patients eligible for inclusion in LPCS ranged from 17% (TRISTAN) to 42% (ECLIPSE, UPLIFT). CONCLUSION: Primary care COPD patients stand out from patients enrolled in LPCS in terms of gender, lung function, quality of life and exacerbations. More research is needed to determine the effect of pharmacological treatment in mild to moderate patients. We encourage future guideline makers to involve primary care populations in their recommendations.

Improving the differential diagnosis of chronic obstructive pulmonary disease in primary care.

Chronic obstructive pulmonary disease (COPD) and asthma represent a substantial portion of primary care practice. In adults, differentiating asthma from COPD can be difficult but is important because of the marked differences in treatment, disease progression, and outcomes between the 2 conditions. Currently, clinical COPD is often misdiagnosed or undiagnosed until late in the disease. Earlier diagnosis could markedly reduce morbidity and improve quality of life. Establishing a diagnosis of COPD requires spirometry testing, interpreted in the context of the patient's symptoms, smoking status, age, and comorbidities. Additional tests and tools may be helpful in the differential diagnosis, including questionnaires specifically developed to discriminate between COPD and asthma and, in special cases, imaging studies. Follow-up and monitoring of asthma and COPD are always necessary and provide additional benefit in patients in whom only continued care and reassessment can confirm the final diagnosis, such as younger individuals with fixed airway obstruction, smokers with asthma, and patients with both disorders. Key areas for improvement include enhanced case identification, improved quality and interpretation of findings on spirometry, and increased use of tools such as differential diagnosis questionnaires and algorithms to guide the diagnostic and monitoring process. To achieve optimal outcomes, the primary care team should make every effort to establish a firm diagnosis. For this review, we conducted a PubMed search with no time limits using the Medical Subject Headings chronic obstructive pulmonary disease or COPD and asthma, in association with the following search terms: diagnosis, differential diagnosis, mixed or comorbid disease, diagnostic techniques, spirometry, questionnaires, and primary care.

A pilot study of identification and case management of high-risk COPD patients in a general practice.

BACKGROUND: A variety of individual therapeutic interventions have been shown to reduce hospital admissions and improve quality of life in patients with chronic obstructive pulmonary disease (COPD). However, there is a paucity of data of looking at the effect of case management in primary care (i.e. using an integrated care approach) of people at higher risk of mortality from COPD. OBJECTIVE: To examine the effect of case management in primary care of patients with COPD at high risk of hospital admission, identified using a novel multidimensional index of disease severity (DOSE index). METHODS: Observational pilot study in a single general practice. High-risk patients were identified using the DOSE index and case managed using an IT system according to British National Guidelines over a 6-month period. RESULTS: Eleven patients entered and completed the study. There was no improvement in health status, but there was a non-significant reduction in total hospital admissions (three versus zero) and total bed days (16 versus 0) compared to the same reference period in the previous year. There was an increase in self-management knowledge. CONCLUSIONS: Case management of high-risk patients in primary care may reduce hospital admissions. This needs to be tested in a randomized controlled trial.

Emphysema on imaging is associated with quality of life in elderly patients with chronic obstructive pulmonary disease.

BACKGROUND: Limited data are available on the association between the severity of emphysema or airway narrowing, and health-related quality of life (HRQOL) in patients with chronic obstructive pulmonary disease (COPD), which has been seen to be more prevalent among elderly subjects. The aim of this study was to examine the association between HRQOL, physical parameters and structural alterations in lung of COPD patients. METHODS: Stable COPD patients (n = 125; mean age 71.0) were studied. Both the severity of emphysema, which was expressed as the extent of the low-attenuation area (LAA%), and percentage of the large airway wall area (WA%) on high-resolution computed tomography (HRCT) were compared with various parameters of the generic and HRQOL, respectively, together with pulmonary function tests and exercise capacity. RESULTS: The predicted value of forced expiratory volume in 1 s was significantly associated with both LAA% and WA%, but the diffusion capacity was strongly correlated with LAA% alone. Parameters of the generic and HRQOL, and almost all other parameters appeared to be significantly associated with LAA% alone, whereas no association was observed between WA% and QOL. CONCLUSION: We concluded that the severity of emphysema, but not that of large airway narrowing on HRCT, is associated with both generic and health-related QOL and reduced diffusion capacity. This notion might provide useful information in practice among elderly subjects who are unable to perform a spirometry.

Spirometry in primary care case-identification, diagnosis and management of COPD.

Chronic obstructive pulmonary disease (COPD) is an important cause of morbidity and mortality worldwide, yet it remains significantly under-diagnosed. Systematic and opportunistic case-identification efforts in primary care, using questionnaires, careful assessment to identify symptoms, and follow-up spirometry, might improve diagnosis rates and enable earlier detection and management of COPD. The aims of spirometry performed for case-identification purposes are to exclude those patients with symptoms but normal lung function and identify those who require more complete investigation for COPD, including 'diagnostic standard' spirometry. Among patients with a confirmed diagnosis of COPD, spirometry monitoring is useful in identifying those with rapid deterioration in lung function who require further assessment. Spirometry in primary care can also support patient education and may encourage smoking cessation and treatment adherence.

Extent of emphysema on HRCT affects loss of fat-free mass and fat mass in COPD.

BACKGROUND: Although muscle loss is thought to be a prognostic factor in chronic obstructive pulmonary disease (COPD), its determinants remain unclear. AIM: To verify the hypothesis that fat-free mass (FFM) and fat mass (FM) are associated with the extent of emphysema in COPD patients. PATIENTS AND METHODS: A total of 112 stable, male current or ex-smokers with or without COPD attending a secondary care specialist COPD clinic were studied. FFM and FM were measured by bioelectrical impedance analysis. We also assessed the nutrition status, muscle strength by the handgrip test, exercise tolerance by the 6-minute walking test, airflow limitation and diffusion capacity, the extent of emphysema by high-resolution CT scan, systemic inflammation status using C-reactive protein, and a lipid-related hormone (adiponectin). RESULTS: The FFM index (FFMI), which was defined as the FFM divided by the square of the body height, was significantly correlated with age, the total number of lymphocytes, handgrip strength, distance on 6-minute walking, airflow limitation, diffusion capacity, extent of emphysema, and C-reactive protein. On multivariate analysis, the FFMI was associated with handgrip strength and inversely correlated with the extent of emphysema. The FM index (FMI) was positively correlated with pack-years, and was inversely correlated with the extent of emphysema and concentrations of adiponectin. CONCLUSION: The extent of emphysema was correlated with skeletal muscle loss and also the FM.

The prevalence of posttraumatic stress disorder in patients undergoing pulmonary rehabilitation and changes in PTSD symptoms following rehabilitation.

PURPOSE: Posttraumatic stress disorder (PTSD) is a common serious condition, which, although treatable, is often undetected. We investigated the prevalence of PTSD in patients with chronic obstructive pulmonary disease (COPD) referred to pulmonary rehabilitation and the impact of rehabilitation on PTSD symptoms. METHODS: Patients with COPD attending pulmonary rehabilitation programs in South West England completed cross-sectional and longitudinal surveys. Outcome measures included the Posttraumatic Diagnostic Scale, Impact of Events scale, Incremental Shuttle Walking Test, Medical Outcomes Short Form 12, Hospital Anxiety and Depression scale (HADS), and Chronic Respiratory Questionnaire. Questionnaires were completed at face-to-face interviews with participants 1 week before commencing pulmonary rehabilitation and at the end of the program. RESULTS: Patients (N = 100), mean age 68 years, 65% men, served as subjects. Seventy-four participants reported traumatic experiences (37 related to lung disease) and 70 completed the pulmonary rehabilitation program. Eight of 100 participants met diagnostic criteria for PTSD. Participants with PTSD reported worse health status than those without PTSD. After pulmonary rehabilitation, exercise capacity and quality of life scores improved significantly, but PTSD symptom severity did not change. CONCLUSIONS: PTSD was present in 8% of COPD patients referred for pulmonary rehabilitation. After rehabilitation, participants with PTSD improved more in respect to anxiety and disease-specific health status than those without PTSD. PTSD symptoms did not improve following rehabilitation, despite its positive effects on HADS scores, exercise, and health status in this cohort.

Accuracy of diagnostic registers and management of chronic obstructive pulmonary disease: the Devon primary care audit.

BACKGROUND: Guidelines on COPD diagnosis and management encourage primary care physicians to detect the disease at an early stage and to treat patients according to their condition and needs. Problems in guideline implementation include difficulties in diagnosis, using spirometry and the disputed role of reversibility testing. These lead to inaccurate diagnostic registers and inadequacy of administered treatments. This study represents an audit of COPD diagnosis and management in primary care practices in Devon. METHODS: Six hundred and thirty two patients on COPD registers in primary care practices were seen by a visiting Respiratory Specialist Nurse. Diagnoses were made according to the NICE guidelines. Reversibility testing was carried out either routinely or based on clinical indication in two sub-samples. Dyspnoea was assessed. Data were entered into a novel IT-based software which computed guideline-based treatment recommendations. Current and recommended treatments were compared. RESULTS: Five hundred and eighty patients had spirometry. Diagnoses of COPD were confirmed in 422 patients (73%). Thirty nine patients were identified as asthma only, 94 had normal spirometry, 23 were restrictive and 2 had a cardiac disorder. Reversibility testing changed diagnosis of 11% of patients with airflow obstruction, and severity grading in 18%. Three quarters of patients with COPD had been offered practical help with smoking cessation. Short and long-acting anticholinergics and long acting beta-2 agonists had been under-prescribed; in 15-18% of patients they were indicated but not received. Inhaled steroids had been over-prescribed (recommended in 17%; taken by 60%), whereas only 4% of patients with a chronic productive cough were receiving mucolytics. Pulmonary rehabilitation was not available in some areas and was under-used in other areas. CONCLUSION: Diagnostic registers of COPD in primary care contain mistakes leading to inaccurate prevalence estimates and inappropriate treatment decisions. Use of pre-bronchodilator readings for diagnosis overestimates the prevalence and severity in a significant minority, thus post bronchodilator readings should be used. Management of stable COPD does often not correspond to guidelines. The IT system used in this study has the potential to improve diagnosis and management of COPD in primary care.

Educational impact of pulmonary rehabilitation: Lung Information Needs Questionnaire.

INTRODUCTION: The Lung Information Needs Questionnaire (LINQ) assesses, from the patient's perspective, their need for education. This questionnaire yields a total score and scores in six domains: disease knowledge, medicine, self-management, smoking, exercise and diet. The aim of this study was to assess the sensitivity of the LINQ to change before and after pulmonary rehabilitation (PR). METHOD: PR programmes across the UK recruited 158 patients (male=94; 59%). The participants completed the LINQ and other measures as used by the individual sites pre- and post-PR, including the Shuttle Walking Test, Chronic Respiratory Disease Questionnaire, the Hospital Anxiety and Depression Scale. RESULTS: Data were analysed on 115 patients who completed data collection pre- and post-PR. The LINQ total scores, and subscales scores across all sites improved significantly with large effect sizes, except for the smoking domain as information needs about smoking were well met prior to PR. There were similar patterns of information needs at baseline and after PR in all sites. DISCUSSION: This study shows that the LINQ is a practical tool for detecting areas where patients need education and is sensitive to change after PR. The quality of the education component of PR can be assessed using the LINQ, which could be considered as a routinely collected outcome measure in PR. The LINQ may also be a useful tool for general practitioners to assess their patients' educational needs.

'Am I going to see the next morning?' A qualitative study of patients' perspectives of sleep in COPD.

AIM: To investigate patients' perspectives of sleep in COPD. METHOD: Patients with moderate to severe COPD underwent semi-structured interviews about their sleep experiences. Contextual questionnaire data were collected. RESULTS: Ten patients were studied. Six reported bad sleep, but all described some sleep problems. Nocturnal anxiety and fears of breathlessness and dying were common features; these impacted on existing sleep problems related to exacerbations, medications, and habitual behaviours that can disrupt sleep. Poor sleep was associated with poorer health status. Patients reported a lack of support from their GPs and few had received advice for sleep problems. CONCLUSION: Anxiety about breathlessness affects the sleep experience of patients with COPD, and sleep quality impacts on physical and emotional functioning. Education about behaviours that can disrupt sleep offers potential benefits to the patient. COPD patients' sleep issues are complex and should be addressed at the clinical consultation.

A pilot study of pulmonary rehabilitation in primary care.

Pulmonary rehabilitation is an effective intervention for patients with chronic obstructive pulmonary disease (COPD). It is usually available only through selected hospitals. A pilot study was undertaken to see if pulmonary rehabilitation performed by the primary health care team in one practice was feasible. Fourteen patients were recruited; 13 completed the programme and one year of follow-up. The programme was well received by patients and staff. There were not enough suitable patients among a practice list of 10,500 to justify the running of this programme for a single practice; one primary care group would suffice

The role of the practice nurse in the management of chronic obstructive pulmonary disease (COPD).

AIMS: To assess the range of activities performed by practice nurses in COPD management and their training for these tasks. METHODS: A postal questionnaire was sent to the nurse with prime responsibility for respiratory care in 179 practices in Cornwall and Southwest Devon. RESULTS: The response rate was 64%. Spirometers were available in 64% of practices (range 0-6 per practice). Of these, spirometry was performed by nurses alone in 72%; in 44% spirometry was performed less than once a week. Spirometry was used for diagnosis in 91%; monitoring in 87% and screening asymptomatic smokers in 45%. Reversibility testing was performed by 61% of the practices. Formal training in spirometry had been undertaken by 52%, informal training in 41% and none in 7%. They would like to see the development of one-stop COPD clinics, support from specialist nurses and pulmonary rehabilitation, preferably based in the community. CONCLUSION: Nurses face many problems managing COPD in general practice including equipment, training and professional support.

The role of the practice nurse in the management of asthma.

BACKGROUND: The role of the practice nurse may include diagnosis and management of asthma, this study examines the range of activities performed by nurses and their training. AIMS: To ascertain the role and confidence levels of the practice nurse in diagnosis and management of asthmatic patients. METHODS: A postal questionnaire sent to the named respiratory nurse in 179 practices in Cornwall and Southwest Devon, to assess the number of practice nurses offering asthma management, extent of services and confidence level of nurses in this role. RESULTS: The response rate was 64%: Dedicated asthma clinics operated in 47% of practices, 87% undertaken by the nurse alone. Responsibilities undertaken by nurses alone included: instruction of inhaler technique 93%, supervising self-management plans 87%, changing medication dosage 71%, withdrawing treatment 53%, diagnosing asthma 45% and managing acute exacerbations 29%. Nurses initiated treatment alone, without consulting a doctor, as follows; inhaled bronchodilators 55%, long acting bronchodilators 54%, inhaled steroids 56%, oral steroids 15%, anti-leukotrienes 5% and theophyllines 3%. The confidence level of the nurses performing these tasks was high. Formal training had been undertaken by 74% of respondents. There were statistically significant associations between performance of organisational tasks and training, but surprisingly no apparent statistical associations with training and independent initiation of treatments. CONCLUSIONS: Practice nurses are performing activities previously undertaken by doctors. A minority have not had formal training and performing these activities, without well-defined shared care protocols, may be outside current legal frameworks.