Anja Frei
Anja Frei
Senior Researcher, University of Zurich
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Cited by
Cited by
Determinants and outcomes of physical activity in patients with COPD: a systematic review
E Gimeno-Santos, A Frei, C Steurer-Stey, J De Batlle, RA Rabinovich, ...
Thorax 69 (8), 731-739, 2014
Smoking cessation induces profound changes in the composition of the intestinal microbiota in humans
L Biedermann, J Zeitz, J Mwinyi, E Sutter-Minder, A Rehman, SJ Ott, ...
PloS one 8 (3), e59260, 2013
Antibiotics for exacerbations of chronic obstructive pulmonary disease
DJ Vollenweider, A Frei, CA Steurer‐Stey, J Garcia‐Aymerich, MA Puhan
Cochrane Database of Systematic Reviews, 2018
Physical activity is increased by a 12-week semiautomated telecoaching programme in patients with COPD: a multicentre randomised controlled trial
H Demeyer, Z Louvaris, A Frei, RA Rabinovich, C de Jong, ...
Thorax 72 (5), 415-423, 2017
A multicentre validation of the 1-min sit-to-stand test in patients with COPD
S Crook, G Büsching, K Schultz, N Lehbert, D Jelusic, S Keusch, ...
European Respiratory Journal 49 (3), 2017
Self-efficacy instruments for patients with chronic diseases suffer from methodological limitations-a systematic review
A Frei, A Svarin, C Steurer-Stey, MA Puhan
Health and quality of life outcomes 7, 1-10, 2009
Five comorbidities reflected the health status in patients with chronic obstructive pulmonary disease: the newly developed COMCOLD index
A Frei, P Muggensturm, N Putcha, L Siebeling, M Zoller, CM Boyd, ...
Journal of clinical epidemiology 67 (8), 904-911, 2014
Drivers of acceptance of COVID-19 proximity tracing apps in Switzerland: panel survey analysis
V von Wyl, M Höglinger, C Sieber, M Kaufmann, A Moser, M Serra-Burriel, ...
JMIR public health and surveillance 7 (1), e25701, 2021
Corona Immunitas: study protocol of a nationwide program of SARS-CoV-2 seroprevalence and seroepidemiologic studies in Switzerland
EA West, D Anker, R Amati, A Richard, A Wisniak, A Butty, E Albanese, ...
International journal of public health 65, 1529-1548, 2020
Recovery and symptom trajectories up to two years after SARS-CoV-2 infection: population based, longitudinal cohort study
T Ballouz, D Menges, A Anagnostopoulos, A Domenghino, HE Aschmann, ...
Bmj 381, 2023
The PROactive innovative conceptual framework on physical activity
F Dobbels, C de Jong, E Drost, J Elberse, C Feridou, L Jacobs, ...
European Respiratory Journal 44 (5), 1223-1233, 2014
Minimum important difference of the Epworth Sleepiness Scale in obstructive sleep apnoea: estimation from three randomised controlled trials
S Crook, NA Sievi, KE Bloch, JR Stradling, A Frei, MA Puhan, M Kohler
Thorax 74 (4), 390-396, 2019
A mixed-method study to explore patients' perspective of self-management tasks in the early phase after kidney transplant
G Schmid-Mohler, P Schäfer-Keller, A Frei, T Fehr, R Spirig
Progress in Transplantation 24 (1), 8-18, 2014
Patient-reported physical activity questionnaires: a systematic review of content and format
K Williams, A Frei, A Vetsch, F Dobbels, MA Puhan, K Rüdell
Health and quality of life outcomes 10, 1-18, 2012
No association of 25-hydroxyvitamin D with exacerbations in primary care patients with COPD
MA Puhan, L Siebeling, A Frei, M Zoller, H Bischoff-Ferrari, G Ter Riet
Chest 145 (1), 37-43, 2014
Smartphone-based physical activity telecoaching in chronic obstructive pulmonary disease: mixed-methods study on patient experiences and lessons for implementation
M Loeckx, RA Rabinovich, H Demeyer, Z Louvaris, R Tanner, N Rubio, ...
JMIR mHealth and uHealth 6 (12), e9774, 2018
Validity of instruments to measure physical activity may be questionable due to a lack of conceptual frameworks: a systematic review
E Gimeno-Santos, A Frei, F Dobbels, K Rüdell, MA Puhan, ...
Health and Quality of life Outcomes 9, 1-13, 2011
Objectively measured physical activity in patients with COPD: recommendations from an international task force on physical activity
H Demeyer, D Mohan, C Burtin, AW Vaes, M Heasley, RP Bowler, ...
Chronic Obstructive Pulmonary Diseases: Journal of the COPD Foundation 8 (4 …, 2021
Implementation of the chronic care model in small medical practices improves cardiovascular risk but not glycemic control
A Frei, O Senn, C Chmiel, J Reissner, U Held, T Rosemann
Diabetes care 37 (4), 1039-1047, 2014
The Chronic CARe for diAbeTes study (CARAT): a cluster randomized controlled trial
A Frei, C Chmiel, H Schläpfer, B Birnbaum, U Held, J Steurer, ...
Cardiovascular diabetology 9, 1-11, 2010
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