Thomas Kohlmann
Biographic Data
| ID | 3927596 |
|---|---|
| NAME | Thomas Kohlmann |
| GIVEN NAMES | Thomas |
| FAMILY NAME | Kohlmann |
| SIGNATURE | KOHLMANN T |
| AFFILIATIONS | Medical University of Lübeck, Germany |
| VERIFIED | No |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 0 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1988 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 0 |
Scoring the EQ-HWB-S: Can we do it without value sets? A non-parametric item response theory analysis
As EQ-HWB-S items formed a strong scale and subscales based on Mokken analysis, LSS is a promising weighting-free approach to scoring
Fluctuations of health states in dementia diseases and their impact on the assessment of health today using the EQ-5D-5L: Protocol of a mixed-methods study
Introduction: The EQ-5D is a widely used health-related quality of life (HRQoL) instrument. The recall period "today" may miss out on recurrent health fluctuations often observed in people with dementia (PlwD). Thus, this study aims to assess the frequency of health fluctuations, affected HRQoL dimensions and the impact of the health fluctuations on the assessment of health today using the EQ-5D-5L. Methods and analysis: This mixed-methods study …
Psychometric properties of the EQ-5D-5L: A systematic review of the literature
Combining EQ-5D-5L items into a level summary score: Demonstrating feasibility using non-parametric item response theory using an international dataset
The 5 items of the EQ-5D-5L form a moderate to strong Mokken scale, enabling persons to be ordered using the level summary score. Item ordering suggests that the lower range of the score represents mainly problems with pain and anxiety/depression, the mid-range indicates additional problems with mobility and usual activities, and middle to higher range of scores reveals additional limitations with self-care. Scalability and item ordering are even…
Comparison of online and face-to-face valuation of the EQ-5D-5L using composite time trade-off
Compared to F2F data, TTO tasks conducted online had more inconsistencies and decreased engagement, which contributed to compromised data quality. This study illustrates the challenges of conducting online valuation studies using the TTO approach
Measuring changes in health over time using the EQ-5D 3L and 5L: A head-to-head comparison of measurement properties and sensitivity to change in a German inpatient rehabilitation sample
Evaluating Equivalency Between Response Systems: Application of the Rasch Model to a 3 Level and 5 Level EQ-5D Erratum
Vol. 45, No. 9, pp. 812–819. In the article cited above, Table 3 showing EQ-5D United Kingdom utility weights (coefficients) for pain/discomfort should be switched with anxiety/depression weights in columns 4 and 5. A corrected Table 3 appears below.TABLE 3: Transformation of United Kingdom and Dutch EQ-5D Algorithms to 5 L System
The quality of life questionnaire EQ-5D-5L: Psychometric properties and normative values for the general German population
Interim Scoring for the EQ-5D-5L: Mapping the EQ-5D-5L to EQ-5D-3L Value Sets
Psychometric Comparison of the Standard EQ-5D to a 5 Level Version in Cancer Patients
OBJECTIVE: The objectives of this study were: 1) to determine whether expanding the number of levels (ie, response categories) on the standard 3 level EQ-5D (EQ-5D-3L) to 5-levels (EQ-5D-5L) would improve the descriptive richness and ability of the measure to discriminate among different levels of health, and 2) to examine the psychometric properties of each EQ-5D version in patients with cancer. METHODS: U.S.-based cancer patients self-assessed …
Evaluating Equivalency Between Response Systems: Application of the Rasch Model to a 3-Level and 5-Level EQ-5D
BACKGROUND: Expansion of the EQ-5D health state classifier to 5 levels (EQ-5D-5L) has been proposed to improve discriminative and evaluative properties, but current preference-based algorithms were developed for a 3-level (EQ-5D-3L) structure. The objectives were to examine equivalency of meaning between 3L and 5L response systems, and to psychometrically derive a system of weights that facilitate conversion of 3L preference-based algorithms to a…
International development of the Parents’ Index of Quality of Life in Atopic Dermatitis (PIQoL-AD)
The QoL-AGHDA: An instrument for the assessment of quality of life in adults with growth hormone deficiency
Structural Latent Class Models
Linear logistic latent class analysis (LCA) relates the item latent probabilities of LCA to basic parameters representing the effects of explanatory variables. Applications of this model to dichotomous data comprise paired comparisons (the compared objects are the explanatory variables); the measurement of change due to, for example, therapeutic interventions (the treatments are the explanatory variables); simple scaling models of the Rasch type …
Sociology of hospitals and of patient-physician interaction in West Germany
Nichtlineare Hauptkomponentenanalyse
In der statistischen Auswertung von Fragebatterien wird häufig die Faktoren- oder die Hauptkomponentenanalyse verwendet. Bei der Anwendung dieser Auswertungsverfahren wird davon ausgegangen, daß dem Untersucher die angemessene Quantifizierung der Antwortkategorien bekannt ist. Im Gegensatz zur herkömmlichen Technik kann im Rahmen der nichtlinearen Hauptkomponentenanalyse die optimale Quantifizierung der Antwortkategorien aus den Daten selbst bere…
No prominent works on this page.
Nichtlineare Hauptkomponentenanalyse
In der statistischen Auswertung von Fragebatterien wird häufig die Faktoren- oder die Hauptkomponentenanalyse verwendet. Bei der Anwendung dieser Auswertungsverfahren wird davon ausgegangen, daß dem Untersucher die angemessene Quantifizierung der Antwortkategorien bekannt ist. Im Gegensatz zur herkömmlichen Technik kann im Rahmen der nichtlinearen Hauptkomponentenanalyse die optimale Quantifizierung der Antwortkategorien aus den Daten selbst bere…
Sociology of hospitals and of patient-physician interaction in West Germany
Structural Latent Class Models
Linear logistic latent class analysis (LCA) relates the item latent probabilities of LCA to basic parameters representing the effects of explanatory variables. Applications of this model to dichotomous data comprise paired comparisons (the compared objects are the explanatory variables); the measurement of change due to, for example, therapeutic interventions (the treatments are the explanatory variables); simple scaling models of the Rasch type …
The QoL-AGHDA: An instrument for the assessment of quality of life in adults with growth hormone deficiency
International development of the Parents’ Index of Quality of Life in Atopic Dermatitis (PIQoL-AD)
Psychometric Comparison of the Standard EQ-5D to a 5 Level Version in Cancer Patients
OBJECTIVE: The objectives of this study were: 1) to determine whether expanding the number of levels (ie, response categories) on the standard 3 level EQ-5D (EQ-5D-3L) to 5-levels (EQ-5D-5L) would improve the descriptive richness and ability of the measure to discriminate among different levels of health, and 2) to examine the psychometric properties of each EQ-5D version in patients with cancer. METHODS: U.S.-based cancer patients self-assessed …
Evaluating Equivalency Between Response Systems: Application of the Rasch Model to a 3-Level and 5-Level EQ-5D
BACKGROUND: Expansion of the EQ-5D health state classifier to 5 levels (EQ-5D-5L) has been proposed to improve discriminative and evaluative properties, but current preference-based algorithms were developed for a 3-level (EQ-5D-3L) structure. The objectives were to examine equivalency of meaning between 3L and 5L response systems, and to psychometrically derive a system of weights that facilitate conversion of 3L preference-based algorithms to a…
Interim Scoring for the EQ-5D-5L: Mapping the EQ-5D-5L to EQ-5D-3L Value Sets
The quality of life questionnaire EQ-5D-5L: Psychometric properties and normative values for the general German population
Measuring changes in health over time using the EQ-5D 3L and 5L: A head-to-head comparison of measurement properties and sensitivity to change in a German inpatient rehabilitation sample
Evaluating Equivalency Between Response Systems: Application of the Rasch Model to a 3 Level and 5 Level EQ-5D Erratum
Vol. 45, No. 9, pp. 812–819. In the article cited above, Table 3 showing EQ-5D United Kingdom utility weights (coefficients) for pain/discomfort should be switched with anxiety/depression weights in columns 4 and 5. A corrected Table 3 appears below.TABLE 3: Transformation of United Kingdom and Dutch EQ-5D Algorithms to 5 L System
Comparison of online and face-to-face valuation of the EQ-5D-5L using composite time trade-off
Compared to F2F data, TTO tasks conducted online had more inconsistencies and decreased engagement, which contributed to compromised data quality. This study illustrates the challenges of conducting online valuation studies using the TTO approach
Psychometric properties of the EQ-5D-5L: A systematic review of the literature
Combining EQ-5D-5L items into a level summary score: Demonstrating feasibility using non-parametric item response theory using an international dataset
The 5 items of the EQ-5D-5L form a moderate to strong Mokken scale, enabling persons to be ordered using the level summary score. Item ordering suggests that the lower range of the score represents mainly problems with pain and anxiety/depression, the mid-range indicates additional problems with mobility and usual activities, and middle to higher range of scores reveals additional limitations with self-care. Scalability and item ordering are even…
Fluctuations of health states in dementia diseases and their impact on the assessment of health today using the EQ-5D-5L: Protocol of a mixed-methods study
Introduction: The EQ-5D is a widely used health-related quality of life (HRQoL) instrument. The recall period "today" may miss out on recurrent health fluctuations often observed in people with dementia (PlwD). Thus, this study aims to assess the frequency of health fluctuations, affected HRQoL dimensions and the impact of the health fluctuations on the assessment of health today using the EQ-5D-5L. Methods and analysis: This mixed-methods study …
Scoring the EQ-HWB-S: Can we do it without value sets? A non-parametric item response theory analysis
As EQ-HWB-S items formed a strong scale and subscales based on Mokken analysis, LSS is a promising weighting-free approach to scoring
Medicine (13 works) · Mathematics (10 works) · Statistics (10 works) · Health Systems, Economic Evaluations, Quality of Life (9 works) · EQ-5D (7 works) · Health related quality of life (7 works) · Psychology (7 works) · Psychometrics (7 works) · Computer Science (4 works) · Disease (4 works)