Perceived Control Of Asthma Questionnaire Research Articles

Turkish validity and reliability study for the perceived control of asthma questionnaire

Rationale The prevalence of asthma is high in Turkish people. however, there is no measurement tool that evaluates the patient’s perception that affects asthma management. Aim In this study, the aim was to test the validity and reliability of the Perceived Control of Asthma Questionnaire (PCAQ) among adults with asthma and to investigate the psychometric features. Method A total of 152 people aged 18 and over, who were diagnosed with asthma at least 1 year ago by a pulmonologist and volunteered to participate in the study were included in the study. The validity of the scale was investigated with exploratory factor analysis, confirmatory factor analysis and criterion validity, while the reliability of the scale was investigated with the Cronbach alpha coefficient and test-repeat test method. Item analysis, corrected item-total point correlations and mean item points for lower-upper 27% groups were investigated. Results According to exploratory factor analysis results, the Turkish form of the PCAQ appeared to explain 53.093% of total variance related to the feature measured. The results of confirmatory factor analysis calculated the goodness-of-fit values for the scale as χ2/sd = 1.507, RMSEA = 0.058, GFI = 0.928, IFI = 0.958, and NFI = 0.886. Additionally, factor loads were ranked from 0.46 to 0.79. The Cronbach alpha internal consistency coefficient was 0.85. The corrected item-total coefficient correlations varied from 0.48 to 0.69. Conclusion All these results show the Perceived Control of Asthma Questionnaire (PCAQ) is a valid and reliable scale tool that can be used for Turkish adults with asthma.

Impact of educational intervention by community pharmacists on asthma clinical outcomes, quality of life and medication adherence: A systematic review and meta-analysis.

Community pharmacists can play an important role in controlling chronic diseases. This study aimed to evaluate the effects of pharmacists' educational interventions in the community pharmacy settings on asthma control and severity, quality of life (QOL) and medication adherence. Databases PubMed, Scopus and Web of Science were searched for evidence regarding asthma severity and control, QOL, and medication adherence after pharmacists' interventions in community pharmacy settings. Twenty-one studies were eligible for qualitative and quantitative analysis. Indices and questionnaires were used in the studies, such as Asthma-related quality of life (IAQLQ), Asthma Control Test (ACT), Perceived Control of Asthma Questionnaire (PCAQ), inhaler technique (IT), Asthma Control Questionnaire (ACQ), 36-Item Short Form survey (SF-36) and peak expiratory flow rate (PEFR). The outcomes were extracted, pooled and analysed as percentages, means, standard deviations and errors, and 95% confidence intervals (CIs). Community pharmacists in all studies educated and followed up the asthmatic patients, addressing the outcome measures. Pharmacists underwent training courses of at least a day. Standardized mean differences for the indices were pooled as follows: IAQLQ -0.241 (95% CI, -0.362 to -0.121), ACT 0.14 (95% CI, 0.02 to 0.27), PCAQ -0.15 (95% CI, -0.28 to 0.01), IT 0.79 (95% CI, 0.05 to 1.54), ACQ -0.50 (95% CI, -0.69 to -0.30), SF-36 0.39 (95% CI, 0.16 to 0.62), PEFR 0.13 (95% CI, 0.01 to 0.26) and asthma symptoms score -0.34 (95% CI, -0.49 to -0.18). Pharmacists' educational interventions in community pharmacy settings could significantly improve asthma severity and control, QOL and medication adherence.

Reliability and validity of Chinese version of Perceived Control of Asthma Questionnaire

Objective We aimed to translate the English version of Perceived Control of Asthma Questionnaire (PCAQ) into Chinese and to test the reliability and validity of the Chinese version of PCAQ in asthma patients. Methods Totally 125 patients with asthma were recruited and were investigated by the Chinese version of PCAQ. The results underwent reliability and validity test. Results The Cronbach's α coefficient of the Chinese version of PCAQ ranged from 0.815 to 0.904, higher than 0.7. The split half coefficient was 0.647; the test-retest reliability was 0.818, which showed that internal consistency of Chinese version of PCAQ was good. The content validity index was 0.952. Factor analysis got 3 factors, which explained 46.079% of the total variance; the factor loading of each item was >0.4. Conclusions The Chinese version of PCAQ has been proved to be reliable and valid. It can be used as a valid tool for the measurement of perceived control in asthma patients. Key words: Perceived Control of Asthma Questionnaire; Asthma; Validity; Reliability

Psychosocial Outcomes Are Related to Asthma Control and Quality of Life in Pregnant Women with Asthma

Background. Little is known about the psychosocial impact and perceived teratogenic (fetal harm due to medication) risks of asthma treatment (inhaled/oral corticosteroids and β-agonist) during pregnancy. Aims. To assess the perception of asthma control, quality of life (QoL), and perceived risks of therapy in pregnant women with asthma. Methods. Pregnant women with asthma (n = 125) were recruited between 12 and 20 weeks gestation. QoL (generic: Short Form-12 Health Survey v1, and asthma specific: Asthma Quality of Life Questionnaire-Marks (AQLQ-M)) and psychological variables were assessed using the Perceived Control of Asthma Questionnaire (PCAQ), the Brief Illness Perception Questionnaire, and the Six-Item Short-Form State Trait Anxiety Inventory (STAI-6). Women’s perceptions of the teratogenic risks of asthma therapy were also assessed and analyzed for adherence to maintenance inhaled corticosteroids (ICSs), poor asthma control, and QoL. Results. Women reported good QoL (median AQLQ-M total score/maximum score = 0.88/10), moderate ability to deal with asthma symptoms (mean PCAQ score = 42.6/55), positive beliefs about their asthma and low anxiety (median STAI score = 26.7/80). Perceived teratogenic risks for asthma drugs were excessive and class dependent. Women perceived there was a 42% teratogenic risk for oral corticosteroid, a 12% risk for ICSs, and a 5% risk with short-acting β-agonist. Illness beliefs, emotional response to illness (p = .030), age ≥ 30 years (p = .046), and maintenance ICS use (p = .045) were significantly associated with uncontrolled asthma, while maintenance ICS use (p = .023), illness beliefs, consequences (p = .044), timeline (p = .016), and emotional response (p = .015) and anxiety (p ≤ .0001) were significantly associated with reduced QoL. Conclusions. In pregnancy, women with asthma experience good QoL but overestimate teratogenic risks of asthma medication. Maintenance ICS use, illness beliefs, and anxiety are associated with impaired QoL and asthma control.

A 6-item brief measure for assessing perceived control of asthma in culturally diverse patients

A concise yet accurate measurement tool is needed for use in research and practice in asthma self-management perceptions across culturally diverse patient populations. To evaluate the psychometric properties of the 11-item Perceived Control of Asthma Questionnaire (PCAQ) and to derive a brief, psychometrically sound, and culturally sensitive measure using item response theory. The PCAQ was administered as one of a battery of measures to 375 adults with asthma as part of an ongoing larger project studying asthma disparities. Analyses of differential item functioning (DIF) were conducted to detect the effects of sex, race/ethnicity, and health literacy on psychometric properties. Forty-eight percent of the sample was non-Hispanic white and 44% was African American. The mean +/- SD age was 43.7 +/- 13.7 years. The derived 6-item version, with 5 DIF items not scored, correlated highly with its full version (r = 0.903; P < .001). The 6-item PCAQ short form has the potential to maintain scale integrity while reducing administration time and lessening survey fatigue in studies using multiple questionnaires. DIF analyses also enabled us to understand the unique aspects of perceived asthma control in demographic groups most affected by asthma.

The Influence of Perceived Control of Asthma on Health Outcomes

Psychosocial factors play an important role in outcomes of asthma. Perceived control, a measure of patients' beliefs about their ability to control their disease, has not been studied in association with asthma health outcomes We used data from a prospective cohort study of patients who were hospitalized for asthma (n = 865). After hospital discharge, we conducted structured telephone interviews to obtain demographic characteristics, asthma history, and psychological variables. Interviews included administration of the Perceived Control of Asthma Questionnaire (PCAQ). We then prospectively measured emergency department (ED) visits and hospitalizations for asthma over time, with a median follow-up time of 1.9 years Greater perceived control was associated with better physical health status (mean score increment per 2-point change in PCAQ score, 1.13; 95% confidence interval [CI], 0.79 to 1.47), better asthma-related quality of life (mean score increment, -2.24; 95% CI, -2.6 to -1.83), fewer days of restricted activity due to asthma (mean increment, -1.23; 95% CI, -1.62 to -0.83), and lower asthma severity scores (mean score increment, -0.40; 95% CI, -0.53 to -0.27). In a multivariate model, greater perceived control was associated with a significantly decreased prospective risk of ED visits (hazard ratio [HR], 0.92; 95% CI, 0.86 to 0.98; p = 0.008) and hospitalizations for asthma (HR, 0.84; 95% CI, 0.78 to 0.90; p < 0.0001). There was no association found between perceived control and most aspects of preventive care or self-management Greater perceived control is associated with improved asthma-related health status as well as with a decreased prospective risk of severe asthma attacks resulting in emergency health-care utilization. This difference does not appear to be mediated by changes in preventive care or asthma self-management practices.

Perceived Control and Quality of Life in Asthma: Impact of Asthma Education

The purpose of this study was to determine the relationship between patients' perception of asthma control and generic and asthma-specific quality of life (QOL) post-completion of a behavior modification–based adult asthma education program. A secondary objective was to examine associations between changes in perceived control of asthma and generic and asthma-specific QOL. Outcome measures were collected via an asthma management questionnaire (AMQ), generic (SF-36) and asthma-specific (AQLQ) QOL questionnaires, and a perceived control of asthma questionnaire (PCAQ). The cohort (n = 55) consisted of predominately female (75%), married (56%), middle income (46%) patients with severe asthma (65%) who had completed a university or college education (20%) and were working full-time (42%). The mean age was 45.2 (SD = 17.5) years. Perceived control of asthma and generic and asthma-specific quality of life significantly improved after completing the behavior modification–based adult asthma education program. Significant associations were found between perceived control of asthma (PCAQ) and both generic (SF-36) and asthma-specific QOL (AQLQ). Baseline PCAQ was related to all four domains and the total score of the AQLQ and 5 of the 8 domains of the SF-36. PCAQ was related to 3 of the 4 AQLQ domains at 3 months and total AQLQ score at both 1 and 3 months post-education. PCAQ was related to all 8 domains of the SF-36 at 1 month; and 4 of 8 domains at 3 months. Change in PCAQ (ΔPCAQ) was related to change in symptom score, emotional functioning, and total AQLQ score from baseline to 1 month and change in symptom score from baseline to 3 months. In conclusion, perceived control of asthma in patients participating in a behavior modification–based asthma education program was related to generic and disease-specific QOL. An improvement in PCAQ was associated with improved QOL following asthma education. Using the PCAQ as part of an asthma educational needs assessment may be a quick, simple way to identify and target education towards asthma patients with low perceived control.

Perceived control of asthma: development and validation of a questionnaire.

Psychological factors can play a role in asthma symptoms and may play a role in how individuals manage asthma. Because poor self-management of asthma has been linked to poor outcomes, it is important to understand perceived control of asthma--the individual's perceived ability to deal with asthma and its exacerbations effectively. This study used data from an ongoing panel study of adults with asthma (n = 601). The 11-item Perceived Control of Asthma Questionnaire (PCAQ) demonstrated internal consistency (Cronbach's alpha = 0.74) and excellent construct validity, correlating strongly with asthma severity, quality of life, and Medical Outcomes Study Short Form (SF-36) measures of health status (p < 0.05). After controlling for demographics and asthma severity, each 6-point decrement in PCAQ score was significantly associated with increased risk of hospitalization (OR = 1.4 [95% CI: 1.1 to 1.8]), frequent activity restriction (OR = 1.5 [1.2 to 1.8]), and, among those with labor force participation (n = 551), asthma-related cessation of employment (OR = 1.7 [1.1 to 2.4]). The PCAQ is a short, easy to administer, reliable, and valid measure of perceived control of asthma. It is strongly associated with adverse asthma outcomes even taking into account demographic characteristics and asthma severity, suggesting that patient-centered interventions focusing on perceived control might improve asthma outcomes.