Martin Claussen

Martin Claussen


Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 July 2017 in Respiratory Research
Verified
Journal Article
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MKMichael Kreuter
Michael Kreuter
JSJeff Swigris
Jeff Swigris
DPDavid Pittrow
David Pittrow
SGSilke Geier
Silke Geier
JKJens Klotsche
Jens Klotsche
JBJürgen BEHR
Jürgen BEHR
The INSIGHTS-IPF registry provides one of the largest data sets of clinical data and self-reported patient related outcomes including health related quality of life (QoL) on patients with idiopathic pulmonary fibrosis (IPF). We aimed to describe associations of various QoL instruments between each other and with patient characteristics at baseline. Six hundred twenty-three IPF patients with available QoL data (St George’s Respiratory Questionnaire SGRQ, UCSD Shortness-of-Breath Questionnaire SoB, EuroQol visual analogue scale and index EQ-5D, Well-being Index WHO-5) were analysed. Mean age was 69.6 ± 8.7 years, 77% were males, mean disease duration 2.0 ± 3.3 years, FVC pred was 67.5 ± 17.8%, DLCO pred 35.6 ± 17%. Mean points were SGRQ total 48.3, UCSD SoB 47.8, EQ-5D VAS 66.8, and WHO-5 13.9. These instruments had a high or very high correlation (exception WHO-5 to EQ-5D VAS with moderate correlation). On bivariate analysis, QoL by SGRQ total was statistically significantly associated with clinical symptoms (NYHA; p < 0.001), number of comorbidities (p < 0.05), hospitalisation rate (p < 0.01) and disease severity (as measured by GAP score, CPI, FVC and 6-min walk test; p < 0.05 each). Multivariate analyses showed a significant association between QoL (by SGRQ total) and IPF duration, FVC, age, NYHA class and indication for long-term oxygen treatment. Overall, IPF patients under real-life conditions have lower QoL compared to those in clinical studies. There is a meaningful relationship between QoL and various patient characteristics. The INSIGHTS-IPF registry is registered at Clinicaltrials.gov ( NCT01695408 ).

25 May 2018 in Respiratory Research
Verified
Journal Article
Open access
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BSBoglárka Lilla Szentes
Boglárka Lilla Szentes
MKMichael Kreuter
Michael Kreuter
TBThomas Bahmer
Thomas Bahmer
SBSurinder S. Birring
Surinder S. Birring
MCMartin Claussen
Martin Claussen
LSLarissa Schwarzkopf
Larissa Schwarzkopf
Patients with interstitial lung diseases (ILD) have impaired health-related quality of life (HRQL). Little is known about the applicability of the disease-specific King’s Brief Interstitial Lung Disease questionnaire (K-BILD) and the generic EQ-5D-5L in a German setting. We assessed disease-specific (K-BILD) and generic HRQL (EQ-5D experience based value set (EBVS) and Visual Analog Scale (VAS)) in 229 patients with different ILD subtypes in a longitudinal observational study (HILDA). Additionally, we assessed the correlation of the HRQL measures with lung function and comorbidities. In a linear regression model, we investigated predictors (including age, sex, ILD subtype, FVC percentage of predicted value (FVC%pred), DLCO percentage of predicted value, and comorbidities). Among the 229 patients mean age was 63.2 (Standard deviation (SD): 12.9), 67.3% male, 24.0% had idiopathic pulmonary fibrosis, and 22.3% sarcoidosis. Means scores were as follows for EQ-5D EBVS 0.66(SD 0.17), VAS 61.4 (SD 19.1) and K-BILD Total 53.6 (SD 13.8). K-BILD had good construct validity (high correlation with EQ-5D EBVS (0.71)) and good internal consistency (Cronbach’s alpha 0.89). Moreover, all HRQL measures were highly accepted by patients including low missing items and there were no ceiling or floor effects. A higher FVC % pred was associated with higher HRQL in all measures meanwhile comorbidities had a negative influence on HRQL. K-BILD and EQ-5D had similar HRQL trends and were associated similarly to the same disease-related factors in Germany. Our data supports the use of K-BILD in clinical practice in Germany, since it captures disease specific effects of ILD. Additionally, the use of the EQ-5D-5L could provide comparison to different disease areas and give an overview about the position of ILD patients in comparison to general population.

28 October 2023 in Diagnostics
Verified
Journal Article
Open access
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HEHatice Elmas
Hatice Elmas
BÖBinnur Önal
Binnur Önal
SSStefan Steurer
Stefan Steurer
BHBirgit Hantzsch-Kuhn
Birgit Hantzsch-Kuhn
MCMartin Claussen
Martin Claussen
PWPD Dr. med. Lutz Welker
PD Dr. med. Lutz Welker
Background: This prospective study assesses the use of rapid remote online cytological evaluation for diagnosing endoscopical achieved biopsies. It focuses on its effectiveness in identifying benign and malignant conditions using digital image processing. Methods: The study was conducted between April 2021 and September 2022 and involved analyses of 314 Rapid Remote Online Cytological Evaluations in total (154 imprint cytologies, 143 fine needle aspirations and 17 brush cytologies) performed on 239 patients at the LungenClinic Grosshansdorf. During on-site evaluation via telecytology, the time requirement was recorded and the findings were compared with the cyto-/histological and final diagnoses. Results: By means of rapid remote online evaluation, findings of 86 cytological benign, 190 malignant and 38 unclear diagnoses were recorded (Ø assessment time, 100 s; range, 11–370 s). In 27 of the 37 specimens with unclear diagnoses, the final findings were malignant tumours and only 6 were benign changes. The diagnosis of another 4 of these 37 findings remained unclear. Excluding these 37 specimens, rapid remote online evaluation achieved a sensitivity of 90.5% with a specificity of 98.5% and a correct classification rate of 92.4% with regard to the final diagnosis of all cases. As expected, an increase in the sensitivity rate for the cytological detection of malignant tumours (76.1% vs. 92.5%) was found especially in fine-needle aspirations. Conclusions: Rapid remote online analysis allows the fast quantitative and qualitative evaluation of clinically obtained cytological specimens. With a correct classification rate of more than 93%, sampling deficiencies can be corrected promptly and diagnostic and therapeutic approaches can be derived.

18 October 2023 in Preprints.org
Verified
Preprint
Open access
PDF file
HEHatice Elmas
Hatice Elmas
BÖBinnur Önal
Binnur Önal
SSStefan Steurer
Stefan Steurer
BHBirgit Hantzsch-Kuhn
Birgit Hantzsch-Kuhn
MCMartin Claussen
Martin Claussen
PWPD Dr. med. Lutz Welker
PD Dr. med. Lutz Welker
Background: This prospective study assesses the use of Rapid Remote Online Cytological Evaluation analysis for diagnosing endoscopical achieved biopsies. It focuses on its effectiveness in identifying benign and malignant conditions using digital image processing. Methods: The study was conducted between April 2021 and September 2022 and involved a total of 314 Rapid Remote Online Cytological Evaluations (17 brush, 143 fine needle aspirations and 154 imprint cytologies) analyses performed on 239 patients at the LungenClinic Grosshansdorf. During on-site evaluation via telecytology, the time requirement was determined and the findings were compared with the cyto-/histological and final diagnoses. Results: By means of Rapid Remote Online Evaluation, 86 cytological benign and 190 malignant and 38 findings of unclear diagnosis were recorded (Ø assessment time 100 sec., range 11 - 370sec.). In 27 of the 38 cases with unclear diagnosis, the final findings were malignant tumours and only 6 were benign changes. The diagnosis of another five of these 38 cases remained unclear. Excluding these 38 findings, the Rapid Remote online cytology achieved a sensitivity of 78.6% with a specificity of 99.5% and a correct classification rate of 93.1% with regard to the final diagnosis of all cases. As expected, an increase in the sensitivity rate for the cytological detection of malignant tumours (76.1% vs. 92.5%) was found especially in fine-needle aspirations. Conclusions: Rapid remote online analysis allows fast quantitative and qualitative evaluation of clinically obtained cytological specimens. With a correct classification rate of more than 93%, sampling deficiencies can be corrected promptly and diagnostic and therapeutic approaches can be derived.