Should the diagnosis of COPD be based on a single spirometry test?

Clinical guidelines indicate that a chronic obstructive pulmonary disease (COPD) diagnosis is made from a single spirometry test. However, long-term stability of diagnosis based on forced expiratory volume in 1 s over forced vital capacity (FEV1/FVC) ratio has not been reported. In primary care subjects at risk for COPD, we investigated shifts in diagnostic category (obstructed/non-obstructed). The data were from symptomatic 40+ years (ex-)smokers referred for diagnostic spirometry, with three spirometry tests, each 12±2 months apart. The obstruction was based on post-bronchodilator FEV1/FVC < lower limit of normal (LLN) and <0.70 (fixed ratio). A total of 2,352 subjects (54% male, post-bronchodilator FEV1 76.5% predicted) were studied. By LLN definition, 32.2% were obstructed at baseline, but 32.2% of them were no longer obstructed at years 1 and/or 2. By fixed ratio, these figures were 46.6 and 23.8%, respectively. Overall, 14.3% of subjects changed diagnostic category by 1 year and 15.4% by 2 years when applying the LLN cut-off, and 15.1 and 14.6% by fixed ratio. Change from obstructed to non-obstructed was more likely for patients with higher body mass index (BMI) and baseline short-acting bronchodilator (SABA) users, and less likely for older subjects, those with lower FEV1% predicted, baseline inhaled steroid users, and current smokers or SABA users at year 1. Change from non-obstructed to obstructed was more likely for males, older subjects, current smokers and patients with lower baseline FEV1% predicted, and less likely for those with higher baseline BMI. Up to one-third of symptomatic (ex-)smokers with baseline obstruction on diagnostic spirometry had shifted to non-obstructed when routinely re-tested after 1 or 2 years. Given the implications for patients and health systems of a diagnosis of COPD, it should not be based on a single spirometry test.

Effectiveness of personalised support for self-management in primary care: a cluster randomised controlled trial.

BACKGROUND: Self-management support is an important component of the clinical management of many chronic conditions. The validated Self-Management Screening questionnaire (SeMaS) assesses individual characteristics that influence a patient's ability to self-manage. AIM: To assess the effect of providing personalised self-management support in clinical practice on patients' activation and health-related behaviours. DESIGN AND SETTING: A cluster randomised controlled trial was conducted in 15 primary care group practices in the south of the Netherlands. METHOD: After attending a dedicated self-management support training session, practice nurses in the intervention arm discussed the results of SeMaS with the patient at baseline, and tailored the self-management support. Participants completed a 13-item Patient Activation Measure (PAM-13) and validated lifestyle questionnaires at baseline and after 6 months. Data, including individual care plans, referrals to self-management interventions, self-monitoring, and healthcare use, were extracted from patients' medical records. Multilevel multiple regression was used to assess the effect on outcomes. RESULTS: The PAM-13 score did not differ significantly between the control (n = 348) and intervention (n = 296) arms at 6 months. In the intervention arm, 29.4% of the patients performed self-monitoring, versus 15.2% in the control arm (effect size r = 0.9, P = 0.01). In the per protocol analysis (control n = 348; intervention n = 136), the effect of the intervention was significant on the number of individual care plans (effect size r = 1.3, P = 0.04) and on self-monitoring (effect size r = 1.0, P = 0.01). CONCLUSION: This study showed that discussing SeMaS and offering tailored support did not affect patient activation or lifestyle, but did stimulate patients to self-monitor and use individual care plans.

Effect of an evidence-based website on healthcare usage: an interrupted time-series study.

OBJECTIVES: Healthcare costs and usage are rising. Evidence-based online health information may reduce healthcare usage, but the evidence is scarce. The objective of this study was to determine whether the release of a nationwide evidence-based health website was associated with a reduction in healthcare usage. DESIGN: Interrupted time series analysis of observational primary care data of healthcare use in the Netherlands from 2009 to 2014. SETTING: General community primary care. POPULATION: 912 000 patients who visited their general practitioners 18.1 million times during the study period. INTERVENTION: In March 2012, an evidence-based health information website was launched by the Dutch College of General Practitioners. It was easily accessible and understandable using plain language. At the end of the study period, the website had 2.9 million unique page views per month. MAIN OUTCOMES MEASURES: Primary outcome was the change in consultation rate (consultations/1000 patients/month) before and after the release of the website. Additionally, a reference group was created by including consultations about topics not being viewed at the website. Subgroup analyses were performed for type of consultations, sex, age and socioeconomic status. RESULTS: After launch of the website, the trend in consultation rate decreased with 1.620 consultations/1000 patients/month (p<0.001). This corresponds to a 12% decline in consultations 2 years after launch of the website. The trend in consultation rate of the reference group showed no change. The subgroup analyses showed a specific decline for consultations by phone and were significant for all other subgroups, except for the youngest age group. CONCLUSIONS: Healthcare usage decreased by 12% after providing high-quality evidence-based online health information. These findings show that e-Health can be effective to improve self-management and reduce healthcare usage in times of increasing healthcare costs.

Validation of Self-Management Screening (SeMaS), a tool to facilitate personalised counselling and support of patients with chronic diseases.

BACKGROUND: A rising number of people with chronic conditions is offered interventions to enhance self-management. The responsiveness of individuals to these interventions depends on patient characteristics. We aimed to develop and validate a tool to facilitate personalised counselling and support for self-management in patients with chronic diseases in primary care. METHODS: We drafted a prototype of the tool for Self-Management Screening (SeMaS), comprising 27 questions that were mainly derived from validated questionnaires. To reach high content validity, we performed a literature review and held focus groups with patients and healthcare professionals as input for the tool. The characteristics self-efficacy, locus of control, depression, anxiety, coping, social support, and perceived burden of disease were incorporated into the tool. Three items were added to guide the type of support or intervention, being computer skills, functioning in groups, and willingness to perform self-monitoring. Subsequently, the construct and criterion validity of the tool were investigated in a sample of 204 chronic patients from two primary care practices. Patients filled in the SeMaS and a set of validated questionnaires for evaluation of SeMaS. The Patient Activation Measure (PAM-13), a generic instrument to measure patient health activation, was used to test the convergent construct validity. RESULTS: Patients had a mean age of 66.8 years and 46.6 % was female. 5.9 % did not experience any barrier to self-management, 28.9 % experienced one minor or major barrier, and 30.4 % two minor or major barriers. Compared to the criterion measures, the positive predictive value of the SeMaS characteristics ranged from 41.5 to 77.8 % and the negative predictive value ranged from 53.3 to 99.4 %. Crohnbach's alpha for internal consistency ranged from 0.56 to 0.87, except for locus of control (α = 0.02). The regression model with PAM-13 as a dependent variable showed that the SeMaS explained 31.7 % (r(2) = 0.317) of the variance in the PAM-13 score. CONCLUSIONS: SeMaS is a short validated tool that can signal potential barriers for self-management that need to be addressed in the dialogue with the patient. As such it can be used to facilitate personalised counselling and support to enhance self-management in patients with chronic conditions in primary care.

[The NHG guidelines 'Adult asthma' and 'COPD']. / NHG-standaarden 'Astma bij volwassenen' en 'COPD'.

The Dutch College of General Practitioners (NHG) guidelines 'Adult asthma' and 'COPD' have been revised. New spirometry reference values from the Global Lung Function Initiative are recommended. Airway obstruction is defined as a FEV1/FVC ratio below the 5th percentile for the reference population. Spirometry for diagnosis takes place without use of patients' inhaled medication and consists of measurements before and after standardized bronchodilation. In monitoring spirometry, patients continue using inhaled medication and standardized bronchodilation is not indicated. The goal of asthma management is optimal asthma control, tailored to individual goals. The most important non-drug intervention in asthma and COPD is to recommend stopping smoking. The goal of COPD management is to limit symptoms, improve exercise capacity and quality of life, and reduce the burden of disease. Inhaled corticosteroids are usually not indicated in COPD treatment. Patients with comorbid asthma and COPD are treated with non-drug interventions according to the COPD guideline and with medication according to the asthma guideline.

[What do you think of Thuisarts.nl? Experiences after 3 years of www.Thuisarts.nl]. / Thuisarts.nl, hoe bevalt dat? Ervaringen na 3 jaar Thuisarts.nl.

Many people need information on health and disease, but the internet is a maze of medical information. In order to offer patients reliable medical information, and to support general practitioners, the Dutch College of General Practitioners (NHG) set up the public website Thuisarts.nl in 2011, which was later followed by an app. The NHG members survey amongst general practitioners from June 2013 showed that 90% of the general practitioners used Thuisarts.nl. The number of visitors was on average 60,000 a day. Information is also available from questionnaires filled in by the NIVEL Health Care Consumer Panel (n = 2846) and participants in a study on information technology and independence (n = 25). Thuisarts.nl meets an important need and is highly valued by doctors and patients. There are plans for the further development of Thuisarts.nl including short videos, illustrations, searchable anatomical structures and information from other reliable organisations such as associations of specialist doctors.

Impact of switching to new spirometric reference equations on severity staging of airflow obstruction in COPD: a crosssectional observational study in primary care.

BACKGROUND: Severity of airflow obstruction in chronic obstructive pulmonary disease (COPD) is based on forced expiratory volume in one second expressed as percentage predicted (FEV1%predicted) derived from reference equations for spirometry results. AIMS: To establish how switching to new spirometric reference equations would affect severity staging of airflow obstruction in the Dutch primary care COPD patient population. METHODS: Spirometry tests of 3,370 adults aged >40 years with obstruction (postbronchodilator FEV1/forced vital capacity (FVC) <0.70) were analysed. The presence and severity of obstruction were defined using Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria. Postbronchodilator FEV1%predicted was calculated using three reference equations: corrected European Community of Steel and Coal (ECSC) (currently recommended in Dutch primary care), Swanney et al., and Global Lung Initiative (GLI). Discordances between severity classifications based on these equations were analysed. RESULTS: We studied 1,297 (38.5%) females and 2,073 males. Application of contemporary reference equations (i.e. Swanney and GLI) changed the GOLD severity stages obtained with the ECSC equations, mostly into milder stages. Severity of airflow obstruction was staged differently in 14.0% and 6.3%, respectively, when the Swanney et al. and GLI reference equations were applied. CONCLUSIONS: Compared with the (corrected) ECSC equations, switching to more contemporary reference equations would result in lower FEV1 predicted values and affect interpretation of spirometry by reclassifying 6-14% of primary care COPD patients into different (mostly milder) severity stages. If and how this will affect GPs' treatment choices in individual patients with COPD requires further investigation.

Implementation of personalized self-management support using the self-management screening questionnaire SeMaS; a study protocol for a cluster randomized trial.

BACKGROUND: The number of patients with one or more chronic diseases is rising. In several standards of care there is a focus on enhancing self-management. We applied the concept of personalization on self-management support and developed a self-management screening questionnaire (SeMaS). The main research objective is to assess the effectiveness of the SeMaS questionnaire and subsequent personalized self-management on patients' self-management behaviors. METHODS/DESIGN: A cluster randomized controlled trial will be set up in 15 general practices in the Netherlands. The practices are all group practices, and member of one care group. The practices will be assigned to the control or intervention arms by stratified randomization. The strata are determined by the participation of the practice nurses in a course for behavioral change, and the nurse's workload. Patients can be included if they are over 18 years of age, have at least one chronic condition and have a checkup appointment with the practice nurse in the inclusion period. The intervention consists of screening patients with the SeMaS questionnaire, producing a graphic profile with the abilities or barriers for self-management. Patients will receive tailored feedback. Practice nurses are trained in using the profile to enhance self-management of the patient and provide personalized self-management support. The use of individual care plans and self-management interventions is stimulated. In the control arm patients will receive care as usual. Patients of both trial arms will be asked to fill in the SeMaS questionnaire and additional questionnaires at inclusion and after 6 months. The primary outcome is the difference in the level of patient activation (PAM-13) between baseline and 6 months. Secondary outcomes include patient measures for lifestyle factors (exercise, diet, smoking), and process measures from medical record data analysis. DISCUSSION: This manuscript presents the protocol for a cluster randomized clinical trial of personalized self-management support using the SeMaS questionnaire in chronically ill patients in primary care. By carrying out this study, scientific evidence is built for the effectiveness of personalized self-management support. TRIAL REGISTRATION: The Netherlands National Trial Register: NTR3960.

Diagnostic accuracy of primary care asthma/COPD working hypotheses, a real life study.

UNLABELLED: Misdiagnoses are inevitable when working hypotheses of asthma/COPD of General Practitioners (GPs) are not checked by spirometry. To reduce misdiagnoses, Asthma/COPD-support services (AC-services) offer support by performing spirometry assessed together with written medical history by consulting pulmonologists. RESEARCH QUESTIONS: Which criteria do GPs use to justify their asthma/COPD working hypotheses? How do diagnostic assessments by an AC-service change GPs' working hypotheses? Do GPs' justifications for their working hypotheses influence the extent to which working hypotheses correspond with diagnoses given by an AC-service? METHOD: We investigated the working hypotheses of 17 GPs for 284 patients with respiratory problems and their justifications: "clinical symptoms", "office spirometry", or "specialist's correspondence". Working hypotheses were compared with diagnoses given by an AC-service, and the influence of the different justifications categories on diagnostic accuracy of the working hypotheses was described. RESULTS: 49% of the working hypothesis were only based on clinical information, 21% were also based on office spirometry. For 30% additional specialist information was available. 50% of the working hypotheses were confirmed by the AC-service. The working hypothesis asthma was confirmed more frequently (62%) than the working hypothesis COPD (40%). The justifications for the working hypotheses given by GPs did not influence these results. CONCLUSION: Diagnostic assessments of the AC-service differed significantly from the working hypotheses of GPs, even when these were based on previous specialists' correspondence or on office spirometry. To optimize the diagnoses in primary care, diagnostic support of an AC-service is recommended for all primary care patients with respiratory problems.

Lung function decline in relation to diagnostic criteria for airflow obstruction in respiratory symptomatic subjects.

BACKGROUND: Current COPD guidelines advocate a fixed < 0.70 FEV1/FVC cutpoint to define airflow obstruction. We compared rate of lung function decline in respiratory symptomatic 40+ subjects who were 'obstructive' or 'non-obstructive' according to the fixed and/or age and gender specific lower limit of normal (LLN) FEV1/FVC cutpoints. METHODS: We studied 3,324 respiratory symptomatic subjects referred to primary care diagnostic centres for spirometry. The cohort was subdivided into four categories based on presence or absence of obstruction according to the fixed and LLN FEV1/FVC cutpoints. Postbronchodilator FEV1 decline served as primary outcome to compare subjects between the respective categories. RESULTS: 918 subjects were obstructive according to the fixed FEV1/FVC cutpoint; 389 (42%) of them were non-obstructive according to the LLN cutpoint. In smokers, postbronchodilator FEV1 decline was 21 (SE 3) ml/year in those non-obstructive according to both cutpoints, 21 (7) ml/year in those obstructive according to the fixed but not according to the LLN cutpoint, and 50 (5) ml/year in those obstructive according to both cutpoints (p = 0.004). CONCLUSION: This study showed that respiratory symptomatic 40+ smokers and non-smokers who show FEV1/FVC values below the fixed 0.70 cutpoint but above their age/gender specific LLN value did not show accelerated FEV1 decline, in contrast with those showing FEV1/FVC values below their LLN cutpoint.

[Increased multimorbidity in patients in general practice in the period 2003-2009]. / Toename multimorbiditeit bij patiënten in de huisartsenpraktijk in de periode 2003-2009.

OBJECTIVE: To determine the prevalence of chronic multimorbidity and its increase in primary care. DESIGN: Descriptive longitudinal study. METHOD: We selected patients suffering from chronic pulmonary disease, chronic cardiovascular disease, or diabetes from a national representative general practice research database (LINH). For each year in the period 2003-2009, we calculated the prevalence of these separate conditions. We subsequently assessed the prevalence of multimorbidity and its increase for 4 different age groups (0-14, 15-44, 45-64, ≥ 65 years). RESULTS: The percentage of all patients suffering from at least 1 of these chronic conditions increased from 12.6% in 2003 to 15.0% in 2009, an increase of almost 20%. The multimorbidity among these patients rose from 15.9% in 2003 to 18.3% in 2009. This increase in multimorbidity was found in all 3 chronic conditions under study and in all adult age groups. To what extent this increase was caused by improvements in morbidity registration could not be identified. CONCLUSION: There appears to be a considerable increase in recent years in the prevalence of chronic diseases; multimorbidity appears also to have increased. If this trend continues, in 2015 the multimorbidity among patients over 65 years of age with diabetes, chronic pulmonary and/or cardiovascular disease will be more than 30%.

Low body mass index, airflow obstruction, and dyspnoea in a primary care COPD patient population.

AIM: The objective of our study was to explore the existence/co-existence of factors - as per American Thoracic Society (ATS)/European Respiratory Society (ERS) standards - for staging patients in a primary care COPD population. METHOD: A representative sample of COPD patients in primary care was studied. Cross-sectional information on airflow obstruction, body mass index (BMI), and dyspnoea (Modified Medical Research Council [MMRC] score) were collected. The existence/co-existence of these prognostic factors is described. RESULTS: The study sample consisted of 2,023 patients. BMI was low in 11.7%, MMRC score > or =2 was found in 28.7%, and 53.9% fulfilled the criteria of relevant airflow obstruction. Only 3.4% of this population scored on all three prognostic factors. CONCLUSION: Moderate dyspnoea and moderate airflow obstruction were rather prevalent in this primary care population, but coexistence of factors was low. Therefore, it seems that the assessment of BMI and dyspnoea represent additional information on primary care COPD patients.