22 results on '"Van der Kloot, Willem A."'
Search Results
2. Confirmatory Analysis of Exploratively Obtained Factor Structures.
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van Prooijen, Jan-Willem and van der Kloot, Willem A.
- Abstract
Assessed the extent to which results in exploratory factor analysis (EFA) studies can be replicated by confirmatory factor analysis in the same sample. Used 10 factor structures drawn from the literature. Results show that confirmatory factor models in which all low EFA pattern coefficients were fixed to zero fitted especially poorly. (SLD)
- Published
- 2001
3. Meanings of basic values for women and men: a cross-cultural analysis
- Author
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Struch, Naomi, Schwartz, Shalom H., and van der Kloot, Willem A.
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Values -- Social aspects ,Sex differences (Psychology) -- Research ,Social perception -- Research ,Psychology and mental health - Abstract
Do men and women construe basic values in the same way? The authors investigate possible gender differences in value meaning at three levels: 2 dimensions that organize value systems, 10 motivationally distinct values, and 45 value items. They assess differences across and within diverse cultures and perform multidimensional scaling analysis (MDS) and Procrustes analyses on responses to a value survey by 11,244 respondents in eight cultural regions (Chinese East Asia, Eastern Europe, Finland, France, Israel, Japan, Latin America, and the United States). Statistical fit indices and inspection of graphic representations reveal neither cross-culturally consistent gender effects on value meaning nor Gender x Culture interactions. The implications of these findings for theories of gender effects and for the cross-cultural study of gender differences in value importance are discussed.
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- 2002
4. Linking nursing care to medical diagnoses: Heterogeneity of patient groups
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van Beek, Lisanne, Goossen, William T.F., and van der Kloot, Willem A.
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- 2005
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5. Instability of Hierarchical Cluster Analysis Due to Input Order of the Data: The PermuCLUSTER Solution
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van der Kloot, Willem A., Spaans, Alexander M. J., and Heiser, Willem J.
- Published
- 2005
6. Reviews
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Andrich, David and van der Kloot, Willem A.
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- 1991
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7. The psychological burden of an initially unexplained illness: patients with sternocostoclavicular hyperostosis before and after delayed diagnosis
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Chotkan Sadhna A, den Dulk Femke MC, Hafkemeijer Laurian CS, Hamdy Neveen AT, van der Kloot Willem A, van Emmerik Arnold AP, and Kaptein Ad A
- Subjects
Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract Background Sternocostoclavicular hyperostosis (SCCH) is a rare, debilitating, chronic inflammatory disorder of the anterior chest wall due to a chronic sterile osteomyelitis of unknown origin. SCCH is largely underdiagnosed and often misdiagnosed. In individual cases it can remain unrecognized for years. The purpose of this study is twofold. Firstly, to evaluate the psychological condition of SCCH patients, both in the sometimes quite extended pre-diagnostic period between first manifestations and confirmed diagnosis of the disease, and in the current situation. Secondly, to investigate the relationships between the pre-diagnostic and the current psychological conditions of confirmed SCCH patients. Methods Structured interviews were held with 52 confirmed SCCH patients. Questionnaires were included to assess posttraumatic stress symptoms, social support, aspects of pain, illness perceptions, self-reported health status, and quality of life. Results SCCH patients reported stronger posttraumatic stress symptoms, more unfavorable illness perceptions, lower health status, and poorer quality of life than healthy individuals and patients with other diseases or traumatic experiences. Psychological distress in the pre-diagnostic period was associated with unfavorable conditions in the current situation. Conclusion SCCH is an illness with serious psychological consequences. Psychological monitoring of patients with unexplained complaints is recommended as long as a diagnosis has not been reached.
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- 2010
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8. Predictors of Mood Response to Acute Tryptophan Depletion: A Reanalysis
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Booij, Linda, Van der Does, Willem, Benkelfat, Chawki, Bremner, J.Douglas, Cowen, Philip J, Fava, Maurizio, Gillin, Christian, Leyton, Marco, Moore, Polly, Smith, Katharine A, and Van der Kloot, Willem A
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- 2002
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9. External analysis with three-mode principal component models
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van der Kloot, Willem A. and Kroonenberg, Pieter M.
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- 1985
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10. Summarizing the Fifteen Scales of the EORTC QLQ-C30 Questionnaire by Five Aggregate Scales with Two Underlying Dimensions: A Literature Review and an Empirical Study.
- Author
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van der Kloot, Willem A., Kobayashi, Kunihiko, Yamaoka, Kazue, Inoue, Kenichi, Nortier, Hans W. R., and Kaptein, Ad A.
- Subjects
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BREAST tumors , *CANCER patients , *STATISTICAL correlation , *FACTOR analysis , *LIFE skills , *LUNG cancer , *QUALITY of life , *QUESTIONNAIRES , *WELL-being , *DATA analysis software , *DESCRIPTIVE statistics , *KARNOFSKY Performance Status - Abstract
The intercorrelations among the 15 scales of the 30-item Core version of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire suggest that one may combine (1) the physical functioning and role functioning scales, (2) the emotional functioning and cognitive functioning scales, and (3) the nine symptom scales. Together with the global health/quality of life scale and the social functioning scale, five measures remain. Principal component analysis of those five measures, using data from Japanese and Dutch breast and lung cancer patients, yielded two dimensions: (1) generalized health related quality of life and (2) health-independent psychological well-being. The correlations of these dimensions with the Brief Illness Perception Questionnaire and Karnofsky performance substantiated this interpretation. [ABSTRACT FROM PUBLISHER]
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- 2014
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11. Illness Perceptions and Quality of Life in Japanese and Dutch Women with Breast Cancer.
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Kaptein, Adrian A., Yamaoka, Kazue, Snoei, Lucia, Van Der Kloot, Willem A., Inoue, Kenichi, Tabei, T., Kroep, Judith R., Krol-Warmerdam, Elly, Ranke, Gemma, Meirink, Corrie, Does, Aukje, and Nortier, Hans
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PSYCHOLOGICAL adaptation ,ANALYSIS of variance ,ASTHMA ,ATTITUDE (Psychology) ,BREAST tumors ,CONFIDENCE intervals ,DISEASES ,LIFE skills ,MATHEMATICAL models ,TYPE 2 diabetes ,SENSORY perception ,PROBABILITY theory ,QUALITY of life ,QUESTIONNAIRES ,RESEARCH ,RESEARCH funding ,SELF-management (Psychology) ,WOMEN'S health ,ETHNOLOGY research ,PILOT projects ,THEORY ,REPEATED measures design - Abstract
Knowledge on cross-cultural quality of life (QOL) and illness perceptions may help women with breast cancer cope more effectively. The self regulation model (SRM) guided the current exploratory longitudinal pilot-study. Central to SRM is the perception of health threats and their effects on QOL. Illness perceptions and QOL were assessed in 22 Dutch and 21 Japanese patients with breast cancer who filled out questionnaires before, 1 week, and 8 weeks after the first chemotherapy course. The questionnaires assessed QOL and illness perceptions. Patients’ scores were compared with groups of patients with other chronic somatic illnesses (asthma, diabetes). Patients in both samples reported major impact of chemotherapy on global health status, physical functioning, role functioning, emotional functioning, constipation and diarrhea. Differences between Japanese and Dutch patients were limited to social functioning and financial problems. Japanese patients expressed stronger concerns about their illness than Dutch patients. Results of the Japanese and Dutch patients with breast cancer differed from data in patients with asthma on consequences, timeline, concern and emotional response. Results of Japanese patients differed from patients with type 2 diabetes on timeline and concern, whereas Dutch patients differed on timeline and consequences. Japanese and Dutch breast cancer patients have—overall—similar illness perceptions and QOL responses and are aware of the typical characteristics of their disease. The results support the feasibility of cross-cultural psychosocial research in oncology and offer implications for clinical interventions which impact on self-efficacy to empower patients with breast cancer. [ABSTRACT FROM PUBLISHER]
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- 2013
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12. The psychological burden of an initially unexplained illness: patients with sternocostoclavicular hyperostosis before and after delayed diagnosis.
- Author
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van der Kloot, Willem A., Hamdy, Neveen A. T., Hafkemeijer, Laurian C. S., den Dulk, Femke M. C., Chotkan, Sadhna A., van Emmerik, Arnold A. P., and Kaptein, Ad A.
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EXOSTOSIS , *BONE diseases , *QUALITY of life , *PSYCHOLOGICAL stress , *MENTAL health , *PATIENTS - Abstract
Background: Sternocostoclavicular hyperostosis (SCCH) is a rare, debilitating, chronic inflammatory disorder of the anterior chest wall due to a chronic sterile osteomyelitis of unknown origin. SCCH is largely underdiagnosed and often misdiagnosed. In individual cases it can remain unrecognized for years. The purpose of this study is twofold. Firstly, to evaluate the psychological condition of SCCH patients, both in the sometimes quite extended prediagnostic period between first manifestations and confirmed diagnosis of the disease, and in the current situation. Secondly, to investigate the relationships between the pre-diagnostic and the current psychological conditions of confirmed SCCH patients. Methods: Structured interviews were held with 52 confirmed SCCH patients. Questionnaires were included to assess posttraumatic stress symptoms, social support, aspects of pain, illness perceptions, self-reported health status, and quality of life. Results: SCCH patients reported stronger posttraumatic stress symptoms, more unfavorable illness perceptions, lower health status, and poorer quality of life than healthy individuals and patients with other diseases or traumatic experiences. Psychological distress in the pre-diagnostic period was associated with unfavorable conditions in the current situation. Conclusion: SCCH is an illness with serious psychological consequences. Psychological monitoring of patients with unexplained complaints is recommended as long as a diagnosis has not been reached. [ABSTRACT FROM AUTHOR]
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- 2010
- Full Text
- View/download PDF
13. Confirmatory Analysis of Exploratively Obtained Factor Structures.
- Author
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Van Prooijen, Jan-Willem and Van Der Kloot, Willem A.
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PSYCHOLOGICAL tests , *FACTOR analysis - Abstract
Factor structures obtained by exploratory factor analysis (EFA) often turn out to fit poorly in confirmative follow-up studies. In the present study, the authors assessed the extent to which results obtained in EFA studies can be replicated by confirmatory factor analysis (CFA) in the same sample. More specifically, the authors used CFA to test three different factor models on several correlation matrices of exploratively obtained factor structures that were reported in the literature. The factor models varied with respect to the role of the smaller factor pattern coefficients. Results showed that confirmatory factor models in which all low EFA pattern coefficients were fixed to zero fitted especially poorly. The authors conclude that it may be justified to use a less constrained model when testing a factor model by allowing some correlation among the factors and some of the lower factor pattern coefficients to differ from zero. [ABSTRACT FROM AUTHOR]
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- 2001
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14. THE USE OF GRAMMATICAL INFORMATION IN LEARNERS' DICTIONARIES.
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Bogaards, Paul and van der Kloot, Willem A.
- Abstract
Much has been written about the role of grammar in the dictionary, and in particular the place and the nature of grammatical information in learners' dictionaries have been extensively debated. However, most of the debate has been about the completeness and the consistency of the grammatical information provided; very little has been said about the usefulness or the usability of the various systems that can be found in learners' dictionaries. After a brief Introduction, Part 2 of this paper discusses the evolution of the grammatical indications that are provided for verbs. The third part of the paper contains the report of an experimental investigation into the use foreign learners make of the grammatical information in three learners' dictionaries. [ABSTRACT FROM PUBLISHER]
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- 2001
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15. The implicit structure of influence strategies and social relationships.
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Poppe, Mattijs, van der Kloot, Willem, and Valkenberg, Huib
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SOCIAL influence , *INTERPERSONAL relations - Abstract
Research on the implicit structure of influence strategies and research on the implicit structure of relationships were combined. Forty respondents rated how (un)common each of 26 influence strategies was in each of 24 relationships. By means of multiple correspondence analysis the implicit structure of relationships and the implicit structure of influence strategies were established simultaneously. A three-dimensional structure was found with the dimensions of cooperation versus competition, more powerful versus less powerful, and social-emotional versus task-oriented. It is concluded that relationships and influence strategies are aspects of the same cognitive schema of social influence. [ABSTRACT FROM AUTHOR]
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- 1999
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16. Multidimensional Scaling of Sorting Data: A Comparison of Three Procedures.
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Van der Kloot, Willem A. and Van Herk, Hester
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MULTIDIMENSIONAL scaling , *PSYCHOLOGICAL research - Abstract
Dissimilarity measures (D) derived from sortings of stimuli can be submitted to multidimensional scaling (MDS) either directly, or after transforming them to profile distances (Δ) computed on the rows of the D matrix. The latter procedure was criticized by Drasgow and Jones (1979) who performed two simulation studies, which are criticized here in turn. In the present article two sets of real sorting data were used for comparing the results of MDS on D and Δ, both with each other and with the results of two other procedures: multiple correspondence analysis (by means of HOMALS) on the raw sorting data, and MDS on the pairwise similarity ratings of the same stimuli by the same subjects. The three procedures were compared both with respect to the final configurations and with regard to the fit of the corresponding distances to the data. These comparisons suggested that MDS on D is slightly superior to MDS on Δ. The latter analysis, however, yields results that are similar to those of the much more efficient HOMALS program. The differences, however, are on the average very small. [ABSTRACT FROM AUTHOR]
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- 1991
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17. Implicit Theories of Personality: Further Evidence of Extreme Response Style.
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Van der Kloot, Willem A., Kroonenberg, Pieter M., and Bakker, Dini
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PERSONALITY , *PRINCIPAL components analysis - Abstract
Five groups of 19 subjects made ratings on 11 personality trait scales of overlapping subsets of 59 artificial stimulus persons who were described by one to five personality trait adjectives. The data were analyzed per group of subjects (blockwise) and per type of stimulus person (questionnaire-wise) by means of three-mode principal component analyses. This yielded highly similar structures for the scales, and in the blockwise analyses, for the stimulus persons. This similarity was substantiated by external three-mode analyses, which showed that all stimulus persons can be mapped into one overall configuration. In all analyses it was found that differences between subjects consisted of differences in extremity of judgment, which suggests the operation of response style. [ABSTRACT FROM AUTHOR]
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- 1985
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18. GROUP AND INDIVIDUAL IMPLICIT THEORIES OF PERSONALITY: AN APPLICATION OF THREE-MODE PRINCIPAL COMPONENT ANALYSIS.
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Van der Kloot, Willem A. and Kroonenberg, Pieter M.
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PRINCIPAL components analysis , *PERSONALITY - Abstract
Data produced by 60 subjects rating 31 artificial persons on 11 personality trait scales were analyzed by three-mode principal component analysis. The subjects shared a circular configuration of stimuli and scales. Individuals tended to depart from this pattern in extremity of judgement rather than configuration, suggesting the operation of a response style. The advantages of including "artificial subjects," and of partitioning the residual sums of squares are discussed. [ABSTRACT FROM AUTHOR]
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- 1982
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19. The perceived structure of 176 pain descriptive words
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Verkes, Robbert-Jan, Van der Kloot, Willem A., and Van der Meij, John
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- 1989
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20. Illness perceptions and quality of life in Japanese and Dutch patients with non-small-cell lung cancer
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Kaptein, Ad A., Yamaoka, Kazue, Snoei, Lucia, Kobayashi, Kunihiko, Uchida, Yuka, van der Kloot, Willem A., Tabei, Toshio, Kleijn, Wim Chr., Koster, Mariska, Wijnands, Giel, Kaajan, Hans, Tran, Tommy, Inoue, Kenichi, van Klink, Rik, van Dooren-Coppens, Eva, Dik, Hans, Hayashi, Fumi, Willems, Luuk, Annema-Schmidt, Dunja, and Annema, Jouke
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LUNG cancer patients , *QUALITY of life , *PSYCHOSOCIAL factors , *CANCER chemotherapy , *JAPANESE people , *DUTCH people , *CROSS-cultural studies , *DISEASES - Abstract
Abstract: This study examined quality of life (QOL) and illness perceptions in Dutch and Japanese patients with non-small-cell lung cancer, thereby extending the body of knowledge on cultural differences and psychosocial aspects of this illness. 24 Dutch and 22 Japanese patients with non-small-cell lung cancer filled out questionnaires on three occasions: immediately before chemotherapy, 1 week later, and 8 weeks after the initial chemotherapy. The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) assessed QOL, and the Brief Illness Perception Questionnaire (B-IPQ) illness perceptions. Scores on several QOL measures indicated (a) major impact of first chemotherapy sessions, and (b) some tendency to returning to baseline measures at 8 weeks. Differences between Japanese and Dutch samples were found on five EORTC QLQ-C30 dimensions: global health status, emotional functioning, social functioning, constipation, and financial difficulties, with the Dutch patients reporting more favorable scores. Regarding illness perceptions, Japanese patients had higher means on perceived treatment control and personal control, expressing a higher sense of belief in the success of medical treatment than Dutch patients. In both Japanese and Dutch patients, impact of chemotherapy on QOL was evident. Some differences in illness perceptions and QOL between the two samples were observed, with implications for integral medical management. Both samples reported illness perceptions that reflect the major consequences of non-small-cell lung cancer. Incorporating symptom reports, illness perceptions, and QOL into medical management may have positive consequences for patients with non-small-cell lung cancer. [Copyright &y& Elsevier]
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- 2011
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21. The effects of illness beliefs and chemotherapy impact on quality of life in Japanese and Dutch patients with breast or lung cancer.
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van der Kloot WA, Uchida Y, Inoue K, Kobayashi K, Yamaoka K, Nortier HW, and Kaptein AA
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- Attitude to Health, Breast Neoplasms drug therapy, Breast Neoplasms epidemiology, Carcinoma, Non-Small-Cell Lung drug therapy, Carcinoma, Non-Small-Cell Lung epidemiology, Cross-Cultural Comparison, Culture, Female, Follow-Up Studies, Health Status, Humans, Lung Neoplasms drug therapy, Lung Neoplasms epidemiology, Male, Middle Aged, Netherlands epidemiology, Perception, Prognosis, Surveys and Questionnaires, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Breast Neoplasms psychology, Carcinoma, Non-Small-Cell Lung psychology, Lung Neoplasms psychology, Quality of Life
- Abstract
Background: Responses to diagnosis and treatment of cancer are mediated by a patient's illness perceptions. Such perceptions, though different among individuals, may be culturally dependent, and act upon health related quality of life (HRQOL). Over time, individual patients show different types of response trajectories. Four issues were investigated: (I) country and disease differences in illness beliefs between Japanese and Dutch patients with lung or breast cancer; (II) country and disease differences in HRQOL in early chemotherapy; (III) individual, country, and disease differences among HRQOL trajectories; (IV) the impact of illness beliefs on HRQOL trajectories., Methods: A total of 89 Japanese and Dutch patients with lung or breast cancer cooperated immediately before, one week after, and eight weeks after the start of chemotherapy. Data included the EORTC QLQ-C30 quality of life (QL) questionnaire and the Brief Illness Perception Questionnaire (B-IPQ). EORTC QLQ-C30 scales were summarized by two dimensions: generalized quality of life (GENQOL) and psychological well-being (PSYQOL)., Results: (I) Japanese patients had higher means on B-IPQ's concern and time line than Dutch patients. Japanese lung cancer patients had a higher mean on treatment control than all other patients; (II) no differences between country and cancer type occurred on the two HRQOL dimensions. First assessment HRQOL differed significantly from the second and third assessments without differences between the latter two. Between the first two assessments, a decrease in GENQOL occurred, together with an improvement in PSYQOL; (III) individual differences dominated the trajectories; (IV) negative beliefs usually coincided with lower scores on GENQOL and PSYQOL. Patients initially lower on PSYQOL generally showed larger improvement., Conclusions: Individual differences in HRQOL dominate differences between culture and cancer type, and illness beliefs influence HRQOL changes in individual patients. Clinical application is possible through influencing the patient's illness beliefs to create an optimal starting position for chemotherapy.
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- 2016
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22. Diagnostic delay in sternocostoclavicular hyperostosis: impact on various aspects of quality of life.
- Author
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van der Kloot WA, Chotkan SA, Kaptein AA, and Hamdy NA
- Subjects
- Adult, Aged, Female, Humans, Hyperostosis, Sternocostoclavicular complications, Hyperostosis, Sternocostoclavicular psychology, Hyperostosis, Sternocostoclavicular therapy, Interviews as Topic, Male, Medicine, Middle Aged, Pain physiopathology, Physical Therapy Modalities, Physicians, Family, Psoriasis complications, Radionuclide Imaging, Socioeconomic Factors, Tomography, X-Ray Computed, Young Adult, Delayed Diagnosis economics, Hyperostosis, Sternocostoclavicular diagnosis, Hyperostosis, Sternocostoclavicular physiopathology, Quality of Life
- Abstract
Objective: Sternocostoclavicular hyperostosis (SCCH) is a rare, debilitating, chronic inflammatory disorder of the anterior chest wall due to a chronic sterile osteomyelitis of unknown origin, often associated with characteristic skin lesions of palms and soles: pustulosis palmoplantaris. SCCH goes often unrecognized for years before the diagnosis is established and treatment instituted. The objective of this study was to trace the diagnostic paths of patients with SCCH and to investigate the consequences associated with diagnostic delay., Methods: Data were collected through structured interviews of 52 patients with a clinically, scintigraphically, and radiologically established diagnosis of SCCH., Results: The majority of patients presented with swelling and/or pain in the sternocostoclavicular region and/or limited movement of the shoulder girdle. Pustulosis palmoplantaris was present in approximately 30% of patients. The disease went unrecognized for a median of 3.5 years. Patients were often seen by at least 3 members of the medical profession before the diagnosis was suspected and eventually established. Lack of recognition of the clinical manifestations of the disease and delay in diagnosis were associated with important physical, psychological, and socioeconomic consequences affecting quality of life., Conclusion: SCCH remains an ill-recognized disease despite its characteristic clinical features. A low level of awareness of the disorder leads to a delay in diagnosis, which has a significant impact on various aspects of quality of life. Awareness should be raised for this disorder, enabling timely diagnosis and initiation of treatment to prevent the irreversible physical and psychological sequelae associated with the protracted untreated state.
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- 2010
- Full Text
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