SEARCH · PubMed Health

Results for “construct validity”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,027 records · Page 57Linked to original sources

PubMed1995

Perceived social support: psychometric properties of the MSPSS in normal and pathological groups in a developing country.

The factorial structure, reliability and construct validity of the Multidimensional Scale of Perceived Social Support (MSPSS) were investigated in Turkey to check the generality of some of the previous findings from Western samples. Using samples consisting of normals and subjects with medical or mental health problems, the original three factors (subscales) were obtained. The internal consistencies of the MSPSS and its subscales were high. In general, the scales correlated significantly in the expected direction with measures of depression and anxiety, thus supporting the construct validity of the MSPSS. Among the samples, subjects with psychiatric/psychological problems perceived, in general, the least social support. This result further contributed to the construct validity of the scale.

Adolescent↗

PubMed2001

Establishing the minimal number of items for a responsive, valid, health-related quality of life instrument.

Reducing the number of items in a health-related quality of life instrument will enhance efficiency. However, it is important to maintain measurement properties. We determined the effect of reducing items from each domain (dyspnea, fatigue, emotion and mastery) of the 20-item Chronic Respiratory Questionnaire (CRQ). Three randomized trials of respiratory rehabilitation provided data. We removed items one at a time from each domain in three orders: by item impact, item responsiveness, and at random. Responsiveness, test-retest reliability and construct validity were evaluated at each step. Responsiveness and reliability, evaluated by intraclass correlation coefficients (ICC), were reduced marginally as the number of items was reduced to two items per domain. The deterioration was greatest when reducing from two items to one. To detect a particular effect, sample size would increase by about 10% when reducing the number of items in a domain to 2. Construct validity showed a more marked deterioration. Reducing to two items per domain would maintain responsiveness and reliability of the CRQ at an acceptable level, with a trade-off of reduced construct validity and increase in sample size requirements.

Factor Analysis, Statistical↗

PubMed1991

The Health Knowledge Inventory-Alpha: a personal health knowledge test for high school seniors.

This study assessed validity and reliability of the Health Knowledge Inventory-Alpha (HKI-Alpha) in a sample of high school seniors. The HKI-Alpha, a general health knowledge test, consists of 110 multiple choice items covering 11 health content areas. All seniors attending one of four high schools completed HKI-Alpha twice, one week apart. A secondary sample of college students also was tested. Descriptive analysis revealed the test discriminated among examinees and avoided ceiling and floor effects. Test-retest reliability was .81 (n = 355). Internal consistency reliability (KR20) was .85 (n = 418). A sample of college students scored significantly higher than the high school students, demonstrating construct validity. Other estimates of content validity, criterion-related validity, and construct validity were high.

Adolescent↗

PubMedDate not supplied

Developing a measure of sense of belonging.

The purpose of this study was to develop and test psychometrically a self-report instrument designed to measure sense of belonging in adults. The Sense of Belonging Instrument (SOBI) is a 27-item, self-report instrument consisting of two separately scored scales, SOBI-P (psychological state) and SOBI-A (antecedents). Content validity was assessed by a panel of experts. Construct validity, internal consistency, and retest reliability were examined through a series of studies with three subject groups: community college students, patients in treatment for major depression, and Roman Catholic nuns. Results suggest that SOBI-P is a valid and reliable measure of sense of belonging. SOBI-A appears to reflect an individual's motivation for sense of belonging but requires additional study regarding its construct validity and internal consistency.

Adult↗

PubMed2005

Proxy completion of EQ-5D in patients with dementia.

There are measurement difficulties associated with the assessment of health-related quality of life (HRQL) in older people with dementia. The use of proxies is a commonly employed approach to overcome such problems. The research reported in this paper sought to identify, specifically for the EuroQol EQ-5D HRQL instrument, whether construct validity is greater for 'family caregivers' or 'clinicians' as two alternative sources of proxy information for patients with a diagnosis of dementia. This involved the exploration of the strength of the associations between clinical measures of illness severity and EQ-5D data. The data appear to reveal a pattern suggesting that the viewpoint of the proxy (i.e., clinician or family caregiver) is important. The findings suggest that the data provided by clinicians (when compared to data from carers) had higher construct validity for the more observable dimensions of the EQ-5D instrument (i.e., 'mobility' and 'self-care'). Conversely, the data from family carers had higher construct validity for the less observable dimensions (i.e., 'usual activities' and 'anxiety/depression'). Previous research on proxy provision of HRQL data has tended to focus on trying to identify a single proxy. The results of this study suggest that using carefully matched sets of measures and assessment perspectives may produce more valid EQ-5D health state descriptions.

Activities of Daily Living↗

PubMed1999

Measuring the effectiveness of cataract surgery: the reliability and validity of a visual function outcomes instrument.

AIMS: To assess test-retest reliability and validity of the "TyPE" patient self assessed visual function questionnaire, as part of a study in two hospitals measuring the effectiveness of cataract surgery. The American TyPE questionnaire had minor adaptations made for use in Britain. METHODS: Test-retest reliability was assessed on 63 out of 378 adult cataract surgery patients in the study, using Spearman correlation coefficients and kappa coefficients of agreement. "Construct" validity was evaluated by comparing the association between changes in visual function questionnaire scores after surgery, with patients' perception of change in visual function obtained by independent interview of 24 patients. RESULTS: The TyPE questionnaire items showed very good test-retest reliability. Average Spearman and kappa coefficients for 39 patients from hospital 1 were 0.93 and 0.84 respectively. Spearman and kappa coefficients of 0.9 and 0.81 were obtained for those nine patients in hospital 2 where both the test and retest questionnaires were filled in by the same people. However, for the 15 patients from hospital 2, where the questionnaire was filled in by different people in the retest, reliability was less good: the Spearman coefficients were still high, average 0.72, but the kappa coefficients were poor, 0.27. Good construct validity was exhibited, with a correlation of 0.79 between change in distance vision score from the questionnaires and the independent interview. CONCLUSIONS: The adapted TyPE questionnaire is both very reliable and has good construct validity. The kappa coefficient should be used wherever possible to evaluate reliability. The test-retest reliability and validity and practicability of other visual function questionnaires have not been assessed adequately, and further development should be carried out of all such questionnaires, so that they may be introduced into routine clinical care.

Activities of Daily Living↗

PubMed2004

Validation and clinical significance of the Childhood Myositis Assessment Scale for assessment of muscle function in the juvenile idiopathic inflammatory myopathies.

OBJECTIVE: To examine the measurement characteristics of the Childhood Myositis Assessment Scale (CMAS) in children with juvenile idiopathic inflammatory myopathy (juvenile IIM), and to obtain preliminary data on the clinical significance of CMAS scores. METHODS: One hundred eight children with juvenile IIM were evaluated on 2 occasions, 7-9 months apart, using various measures of physical function, strength, and disease activity. Interrater reliability, construct validity, and responsiveness of the CMAS were examined. The minimum clinically important difference (MID) and CMAS scores corresponding to various degrees of physical disability were estimated. RESULTS: The intraclass correlation coefficient for 26 patients assessed by 2 examiners was 0.89, indicating very good interrater reliability. The CMAS score correlated highly with the Childhood Health Assessment Questionnaire (C-HAQ) score and with findings on manual muscle testing (MMT) (r(s) = -0.73 and 0.73, respectively) and moderately with physician-assessed global disease activity and skin activity, parent-assessed global disease severity, and muscle magnetic resonance imaging (r(s) = -0.44 to -0.61), thereby demonstrating good construct validity. The standardized response mean was 0.81 (95% confidence interval 0.53, 1.09) in patients with at least 0.8 cm improvement on a 10-cm visual analog scale for physician-assessed global disease activity, indicating strong responsiveness. In bivariate regression models predicting physician-assessed global disease activity, MMT remained significant in models containing the CMAS (P = 0.03) while the C-HAQ did not (P = 0.4). Estimates of the MID ranged from 1.5 to 3.0 points on a 0-52-point scale. CMAS scores corresponding to no, mild, mild-to-moderate, and moderate physical disability, respectively, were 48, 45, 39, and 30. CONCLUSION: The CMAS exhibits good reliability, construct validity, and responsiveness, and is therefore a valid instrument for the assessment of physical function, muscle strength, and endurance in children with juvenile IIM. Preliminary data on MID and corresponding levels of disability should aid in the clinical interpretation of CMAS scores when assessing patients with juvenile IIM.

Adolescent↗

PubMed2006

Reliability and validity of the ESRD Symptom Checklist--Transplantation Module in Norwegian kidney transplant recipients.

BACKGROUND: The aim of the study was to validate the Norwegian version of a self-administered 43-item questionnaire designed to assess quality of life in kidney transplant recipients, the End-Stage Renal Disease Symptom Checklist--Transplantation Module (ESRD-SCL). METHODS: In total, 53 kidney transplant recipients from one university-affiliated hospital responded to a questionnaire including the ESRD-SCL and the Short Form 36 (SF-36). We assessed internal consistency reliability and test-retest reliability with 2 weeks between assessments. Construct validity was assessed by correlations of the ESRD-SCL subscales with related and unrelated SF-36 scales, demographic, and clinical characteristics. RESULTS: Subscales of the ESRD-SCL showed good internal consistency reliability (Cronbach's = 0.72-0.81) and for the aggregate total scale alpha was 0.94. Test-retest reliability median 14 days apart was excellent with intraclass coefficients ranging from 0.87 to 0.95. The pattern of correlations of the ESRD-SCL scales with related and unrelated scales SF-36 scales and demographic and clinical characteristics gave support to the construct validity of the ESRD-SCL. CONCLUSION: The Norwegian translation of the ESRD-SCL showed satisfactory internal consistency reliability, test-retest reliability and construct validity, at the level of the original German version.

Adult↗

PubMed1998

Measuring satisfaction among low-income women: a prenatal care questionnaire.

OBJECTIVE: To evaluate the reliability and construct validity of a prenatal care satisfaction scale. METHOD: A prenatal care satisfaction scale that included six dimensions of care based on the literature was tested during a telephone interview with 101 first-time African-American and Mexican-American mothers 18 and over who receive Medicaid. RESULTS: The scale exhibited high reliability (Cronbach's alpha = 0.95), as well as good construct validity. The correlation between the scale and rating of the quality of care overall was 0.74 (p < 0.001); the correlation between the scale and whether the women would recommend this provider to a friend was 0.67 (p < 0.001). Results from correlation and factor analysis suggested a different set of dimensions than those described in the literature. CONCLUSION: The 22-question satisfaction with prenatal care scale has excellent reliability and construct validity and taps six established dimensions of satisfaction, including the art of care, technical quality, access, physical environment, availability, and efficacy. The multidimensional scale allows for alternative groupings of the domains of satisfaction as our understanding of prenatal care satisfaction increases.

Adolescent↗

PubMed1998

Multidimensionality of oral health in dentate adults.

OBJECTIVES: An understanding of the validity and usefulness of self-reported measures (as distinct from clinically determined measures) of oral health is emerging. These self-reported measures include self-rated oral health (SROH). Three objectives were to: (1) describe self-rated oral health in dentate adults, (2) quantify associations between self-rated oral health and other measures of oral health (oral disease and tissue damage, pain and discomfort, functional limitation, and disadvantage), and (3) assess the construct validity of a model of oral health proposed herein. METHODS: The Florida Dental Care Study is a longitudinal study of oral health, which included at baseline 873 subjects who had at least one tooth, were 45 years or older, and who participated for an interview and clinical examination. RESULTS: The prevalence of self-rated oral health decrements was substantial; approximately one fourth of subjects reported their oral health as only fair or poor. Bivariate and multivariate results provided consistent evidence of the construct validity of the proposed model of oral health. Additionally, the salience of one measure of dental appearance suggests that persons may use esthetic cues when rating their oral health. CONCLUSIONS: The proposed multidimensional model of oral health has construct validity. Self-rated oral health is affected by oral disease and tissue damage, oral pain and discomfort, oral functional limitation, and oral disadvantage. These self-reported measures and the proposed model should provide useful information for dental care effectiveness research. General health status has been disaggregated into the "physical" and the "mental;" an additional separation into the "oral" aspects of health seems warranted.

Aged↗

PubMed1999

Self-administered joint counts in rheumatoid arthritis: comparison with standard joint counts.

OBJECTIVE: To test the reliability and validity of a self-administered 36 joint count developed after the Rapid Assessment of Disease Activity in Rheumatology (RADAR) questionnaire for assessing pain/tenderness. METHODS: Two self-administered formats (mannequin and text) were evaluated in 60 patients with rheumatoid arthritis (RA). Reliability between both formats was tested by Spearman rank correlation. Criterion validity/accuracy was tested by Spearman correlation coefficient between each self-report format and a joint count performed by a physician. Construct validity was ascertained by correlation of each format with other variables of disease activity. RESULTS: Reliability between the 2 formats was high (R = 0.94). Correlations between each format and the physician's joint count were also high (R = 0.77 for mannequin, 0.75 for text). Patients consistently rated their joint pain/tenderness higher than the physician (means 29, 27, and 12 for text, mannequin, and physician, respectively; p < 0.01). Construct validity of the text, mannequin, and physician formats compared with the modified Health Assessment Questionnaire showed R = 0.61, 0.65, 0.63; with Steinbrocker functional class R = 0.41, 0.46, 0.56; with pain R = 0.59, 0.61, 0.62; with global evaluation R = 0.66, 0.71, 0.84; and with morning stiffness R = 0.64, 0.59, 0.60, respectively. CONCLUSION: Although both self-administered formats exhibited adequate reliability and construct validity, a systematic difference between patient and physician/trained assistant performed joint counts was observed, with patients consistently rating their pain/tenderness higher. We thus do not believe they can replace standard physician/trained assistant evaluation in obtaining clinical research data in rheumatology.

Acute Disease↗

PubMed1997

Head and neck cancer-specific quality of life: instrument validation.

BACKGROUND: The disfigurement and dysfunction associated with head and neck cancer affect emotional well-being and some of the most basic functions of life. Most cancer-specific quality-of-life assessments give a single composite score for head and neck cancer-related quality of life. OBJECTIVE: To develop and evaluate an improved multidimensional instrument to assess head and neck cancer-related functional status and well-being. METHODS: The item selection process included literature review, interviews with health care workers, and patient surveys. A survey with 37 disease-specific questions and the SF-12 survey were administered to 253 patients in 3 large medical centers. Factor analysis was performed to identify disease-specific domains. Domain scores were calculated as the standardized score of the component items. These domains were assessed for construct validity based on clinical hypotheses and test-retest reliability. RESULTS: Four relevant domains were identified: Eating (6 items), Communication (4 items), Pain (4 items), and Emotion (6 items). Each had an internal consistency (Cronbach alpha value) of greater than 0.80. Construct validity was demonstrated by moderate correlations with the SF-12 Physical and Mental component scores (r=0.43-0.60). Test-retest reliability for each domain demonstrated strong reliability between the 2 time points. Correlations were strong for each individual question, ranging from 0.53 to 0.93. Construct validity testing demonstrated that the direction of differences for each domain were as hypothesized. CONCLUSION: The Head and Neck Quality of Life questionnaire is a promising multidimensional tool with which to assess head and neck cancer-specific quality of life.

Factor Analysis, Statistical↗

PubMedDate not supplied

Development of a standardized instrument to assess computer task performance.

OBJECTIVE: The purpose of this study was to determine the psychometric properties of the Assessment of Computer Task Performance, specifically, the test-retest reliability, internal consistency, construct validity, and ability to discriminate between known groups. METHOD: This assessment comprises 14 standardized and timed tasks. It was administered to 24 persons with upper-extremity impairments and 30 with no impairments by a trained occupational therapist. To assess the test-retest reliability, participants in the impaired group were retested within 2 to 7 days. Intraclass correlation coefficients were calculated to determine test-retest reliability. Internal consistency was assessed with Cronbach's alpha, and factor analysis was conducted to examine construct validity. The Mann Whitney U Test was used to assess the test's ability to discriminate between the groups. RESULTS: Results indicated that the tool has excellent reliability and internal consistency, can discriminate between groups, and has appropriate construct validity. CONCLUSION: The Assessment of Computer Task Performance provides occupational therapists with an accurate test to measure computer performance and can assist them in providing computer access services.

Adolescent↗

PubMed2006

Construct and ecological validity of the Occupational Therapy Adult Perceptual Screening Test (OT-APST).

This paper reports on the construct validity (scale design and convergent validity) and ecological validity of the Occupational Therapy Adult Perceptual Screening Test (OT-APST). The performance of 208 participants following stroke on the OT-APST and a reference tool (either the Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) or the LOTCA-Geriatric version (LOTCA-G)) was compared. The OT-APST performance of the stroke sample was compared with a healthy normative sample (n = 356). The relationship between the OT-APST performance and the Functional Independence Measure (FIM) score of the participants following stroke was also examined. Factor analysis and internal consistency results supported the scale design of the OT-APST. Significant correlations between the performance of the participants following stroke on the OT-APST and the reference tool supported the convergent validity of the OT-APST. The ability of the OT-APST to separate the two participant groups provided further evidence of its construct validity. Significant correlations between OT-APST and FIM scores supported the ecological validity of this tool. This study shows that the OT-APST is an ecologically valid tool with demonstrated construct validity in the assessment of visual perception.

Adult↗

PubMed2006

A self-rating scale for patient-perceived side effects of inhaled corticosteroids.

BACKGROUND: Patient-reported side effect questionnaires offer a simple method for the systematic measurement of drug-related side effects. In order to measure patients' inhaled corticosteroids (ICS) related side effect perceptions the 14-day retrospective Inhaled Corticosteroid Questionnaire (ICQ) was developed. In this research we aim to assess the construct validity and reliability of the ICQ and test its responsiveness to dose changes in adult asthma patients. METHODS: In a cross-sectional study, current inhaler users with asthma completed the ICQ (27 with non ICS inhaler; 61 BDP equivalent daily ICS low dose < or =400 microg; 62 mid dose 401-800 microg; and 105 with high dose >800 microg). We generated 3 construct validity hypotheses: 1) a hierarchical dose-response pattern for scoring of the individual items on the ICQ, and statistically significant differences in the scores of each of the 15 ICQ domains by ICS dose group 2) an association between ICS dose and ICQ scoring after adjusting for appropriate confounders in multiple regression; 3) greater convergence between local side effect domains than between systemic and local domains of the scale. Test-retest reliability was assessed on a randomly selected subgroup of patients (n = 73) who also completed the ICQ a second time after 7 days. In a separate longitudinal study, 61 patients with asthma completed the ICQ at baseline and after changing their daily ICS dose, at 2- and 6- months, in order to test the ICQ's responsiveness. RESULTS: All three construct validity hypotheses were well supported: 1) a statistically significant difference existed in scores for 14 domains, the high ICS dose group scoring highest; 2) ICS dose independently predicted ICQ scoring after adjusting for confounders; 3) greater convergence existed between local ICQ domains than between local and systemic domains. The ICQ had good reproducibility: test-retest intraclass correlation coefficients were > or =0.69 for all but the 'Facial Oedema' domain. In the longitudinal study, ICQ scores for 'Voice Problems' changed significantly at 2- and 6-months from baseline and other ICQ domains displayed trends in scoring change accordant with dose modulation at 6-months. CONCLUSION: The ICQ has good dose-related discriminative properties, is valid, reliable, and shows potential responsiveness to ICS dose change.

Administration, Inhalation↗

PubMed2005

Identifying palliative care patients with symptoms of depression: an algorithm.

INTRODUCTION: Even though depression has serious and wide-ranging effects on outcomes in palliative care, errors in the identification of depressed patients are common. OBJECTIVES: To examine the clinical validity of widely publicised one- and two-question screening tools for depression in two palliative care settings. Also, to examine the construct validity and acceptability of a new empirically derived algorithm. METHOD: Participants were Australian palliative care patients in an inpatient hospice (n=22) or the community (n=69). Patients completed an unstructured interview about their feelings, questions relevant to three reference standards, two screening questions for depression and questions about the acceptability of the screening questions. RESULTS: The clinical validity of the one- and two-question screening tools did not generalise across the two care settings. In contrast, the algorithm met stringent criteria for clinical validity for two reference standards in both settings. The algorithm also selectively identified patients whose unstructured interviews referred to themes consistent with depression. The algorithm includes potentially sensitive questions about anhedonia and depressed affect. However, almost all patients and staff reported that asking such questions soon after referral was acceptable. CONCLUSIONS: A four-question algorithm designed to identify patients who warrant follow-up for depression showed clinical validity, generalizability and construct validity, and the content was acceptable to patients and clinicians.

Adult↗

PubMed2006

Cross-cultural adaptation and validation of Singapore English and Chinese versions of the Knee injury and Osteoarthritis Outcome Score (KOOS) in Asians with knee osteoarthritis in Singapore.

OBJECTIVE: To cross-culturally adapt and validate Singapore English and Chinese versions of the Knee injury and Osteoarthritis Outcome Score (KOOS) in patients with knee osteoarthritis (OA) in Singapore. METHODS: Singapore English and Chinese versions were cross-culturally adapted from the source English KOOS following standard guidelines (including cognitive debriefing). Patients were asked to complete identical questionnaires containing the KOOS, Short Form 36 Health Survey, and EQ-5D twice within 6 days. Reliability was assessed using Cronbach's alpha and intraclass correlation coefficients (ICC), dimensionality using item-to-domain correlations and convergent and divergent construct validity using 14 and 13 a priori hypotheses, respectively. RESULTS: Singapore English and Chinese KOOS versions were well accepted by patients in pilot testing and were therefore administered to a consecutive sample of 127 English and 131 Chinese-speaking Singaporeans with knee OA. Cronbach's alpha exceeded 0.7 for all domains except for Chinese pain and symptoms domains. ICC exceeded 0.7 for all domains except for English sport and recreation and Chinese knee-related QoL domains. Hypothesized item-to-domain correlations (Spearman's rho>or=0.4) were observed for 38 items in English and 29 in Chinese versions. Convergent construct validity was supported by the presence of hypothesized moderate/strong correlations (rho=0.37-0.65) for 13 and 11 a priori hypotheses in the English and Chinese KOOS, respectively. Divergent construct validity was supported by the presence of weak correlations (rho=0.02-0.34) for 12 and 11 a priori hypotheses in the English and Chinese KOOS, respectively. CONCLUSION: The Singapore English and Chinese KOOS were well accepted and demonstrated acceptable reliability and validity in Asian patients with knee OA in Singapore.

Aged↗

PubMed2006

The Chronic Pain Coping Inventory: confirmatory factor analysis of the French version.

BACKGROUND: Coping strategies are among the psychosocial factors hypothesized to contribute to the development of chronic musculoskeletal disability. The Chronic Pain Coping Inventory (CPCI) was developed to assess eight behavioral coping strategies targeted in multidisciplinary pain treatment (Guarding, Resting, Asking for Assistance, Task Persistence, Relaxation, Exercise/Stretch, Coping Self-Statements and Seeking Social Support). The present study had two objectives. First, it aimed at measuring the internal consistency and the construct validity of the French version of the CPCI. Second, it aimed to verify if, as suggested by the CPCI authors, the scales of this instrument can be grouped according to the following coping families: Illness-focused coping and Wellness-focused coping. METHOD: The CPCI was translated into French with the forward and backward translation procedure. To evaluate internal consistency, Cronbach's alphas were computed. Construct validity of the inventory was estimated through confirmatory factor analysis (CFA) in two samples: a group of 439 Quebecois workers on sick leave in the sub-acute stage of low back pain (less than 84 days after the work accident) and a group of 388 French chronic pain patients seen in a pain clinic. A CFA was also performed to evaluate if the CPCI scales were grouped into two coping families (i.e. Wellness-focused and Illness-focused coping). RESULTS: The French version of the CPCI had adequate internal consistency in both samples. The CFA confirmed the eight-scale structure of the CPCI. A series of second-order CFA confirmed the composition of the Illness-focused family of coping (Guarding, Resting and Asking for Assistance). However, the composition of the Wellness-focused family of coping (Relaxation, Exercise/Stretch, Coping Self-Statements and Seeking Social Support) was different than the one proposed by the authors of the CPCI. Also, a positive correlation was observed between Illness and Wellness coping families. CONCLUSION: The present study indicates that the internal consistency and construct validity of the French version of the CPCI were adequate, but the grouping and labeling of the CPCI families of coping are debatable and deserve further analysis in the context of musculoskeletal and pain rehabilitation.

Adaptation, Psychological↗