Validity and responsiveness of the daily- and clinical visit-PROactive physical activity in COPD (D-PPAC and C-PPAC) instruments
Open accessAbstract
Background: The Daily-PROactive and Clinical visit-PROactive Physical Activity (D-PPAC and C-PPAC) instruments in chronic obstructive pulmonary disease (COPD) combines questionnaire with activity monitor data to measure patients’ experience of physical activity. Their amount, difficulty and total scores range from 0 (worst) to 100 (best) but require further psychometric evaluation. Objective: To test reliability, validity and responsiveness, and to define minimal important difference (MID), of the D-PPAC and C-PPAC instruments, in a large population of patients with stable COPD from diverse severities, settings and countries. Methods: We used data from seven randomised controlled trials to evaluate D-PPAC and C-PPAC internal consistency and construct validity by sex, age groups, COPD severity, country and language as well as responsiveness to interventions, ability to detect change and MID. Results: We included 1324 patients (mean (SD) age 66 (8) years, forced expiratory volume in 1 s 55 (17)% predicted). Scores covered almost the full range from 0 to 100, showed strong internal consistency after stratification and correlated as a priori hypothesised with dyspnoea, health-related quality of life and exercise capacity. Difficulty scores improved after pharmacological treatment and pulmonary rehabilitation, while amount scores improved after behavioural physical activity interventions. All scores were responsive to changes in self-reported physical activity experience (both worsening and improvement) and to the occurrence of COPD exacerbations during follow-up. The MID was estimated to 6 for amount and difficulty scores and 4 for total score. Conclusions: The D-PPAC and C-PPAC instruments are reliable and valid across diverse COPD populations and responsive to pharmacological and non-pharmacological interventions and changes in clinically relevant variables.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
A recent study reported the effect of physical activity behavioural modification interventions or pulmonary rehabilitation alone on patients' experiences of physical activity using the C-PPAC instrument, indicating clinically important improvements.
“A recent study [24] reported the effect of PA behavioural modification interventions or PR alone on patients' experiences of PA using the C-PPAC instrument, indicating clinically important improvements.”
From Behavioural modification interventions alongside pulmonary rehabilitation improve COPD patients’ experiences of physical activity (2021) · cites this paper as [24]
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
Experimental — accuracy not yet measuredThe effect of adding physical activity behavioural modification interventions to pulmonary rehabilitation compared with pulmonary rehabilitation alone on patient physical activity experiences was not reported in that study.
“The effect of adding PA behavioural modification interventions to PR as compared to PR alone on patient PA experiences was, however, not reported in that study [24].”
From Behavioural modification interventions alongside pulmonary rehabilitation improve COPD patients’ experiences of physical activity (2021) · cites this paper as [24]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Cites
Celli, B. R., MacNee, W., Agustí, A. G. N., Anzueto, A. R., Berg, B., Buist, A. S., Calverley, P. M., Chavannes, N. H., Dillard, T. A., Fahy, B. F., et al. (2004) · European Respiratory Journal · doi:10.1183/09031936.04.00014304 · Cited by 4,414 · see citing works
Jones, P. W., Quirk, F. H., Baveystock, C. M., & Littlejohns, P. (1992) · American Review of Respiratory Disease · doi:10.1164/ajrccm/145.6.1321 · Cited by 3,035 · see citing works
Revicki, D. A., Hays, R. D., Cella, D. F., & Sloan, J. A. (2007) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2007.03.012 · Cited by 2,384 · see citing works
Quantifying physical activity in daily life with questionnaires and motion sensors in COPD
Pitta, F. D. O., Troosters, T., Probst, V. S., Spruit, M. A., Decramer, M., & Gosselink, R. (2006) · European Respiratory Journal · doi:10.1183/09031936.06.00064105 · Cited by 471 · see citing works
Self-citationDeterminants and outcomes of physical activity in patients with COPD: a systematic review
Gimeno‐Santos, E., Frei, A. L., Steurer-Stey, C. A., de Batlle, J., Rabinovich, R., Raste, Y., Hopkinson, N. S., Polkey, M. I., Remoortel, H. V., Troosters, T., et al. (2014) · Thorax · doi:10.1136/thoraxjnl-2013-204763 · Cited by 399 · see citing works
Self-citationLevel of daily physical activity in individuals with COPD compared with healthy controls
Vorrink, S., Kort, H. S. M., Troosters, T., & Lammers, J. J. (2011) · Respiratory Research · doi:10.1186/1465-9921-12-33 · Cited by 273 · see citing works
Self-citationDemeyer, H., Louvaris, Z., Frei, A., Rabinovich, R. A., de Jong, C., Gimeno-Santos, E., Loeckx, M., Buttery, S. C., Rubio, N., Van der Molen, T., et al. (2017) · Thorax · doi:10.1136/thoraxjnl-2016-209026 · Cited by 256 · see citing works
Self-citationGiacomini, M. K., DeJean, D., Simeonov, D., & Smith, A. (2012) · Europe PMC (PubMed Central) · Cited by 157 · see citing works
Gimeno-Santos, E., Raste, Y., Demeyer, H., Louvaris, Z., de Jong, C., Rabinovich, R. A., Hopkinson, N. S., Polkey, M. I., Vogiatzis, I., Tabberer, M., et al. (2015) · European Respiratory Journal · doi:10.1183/09031936.00183014 · Cited by 151 · see citing works
Self-citationPatient's perception of exacerbations of COPD—the PERCEIVE study
Miravitlles, M., Anzueto, A., Legnani, D., Forstmeier, L., & Fargel, M. (2006) · Respiratory Medicine · doi:10.1016/j.rmed.2006.07.010 · Cited by 136 · see citing works
Development and testing of the Pulmonary Functional Status and Dyspnea Questionnaire (PFSDQ).
Lareau, S. C., Carrieri‐Kohlman, V., JANSON-BJERKLIE, S., & Roos, P. J. (1994) · PubMed · Cited by 124 · see citing works
Arbillaga-Etxarri, A., Gimeno-Santos, E., Barberan-Garcia, A., Balcells, E., Benet, M., Borrell, E., Celorrio, N., Delgado, A., Jané, C., Marin, A., et al. (2018) · European Respiratory Journal · doi:10.1183/13993003.00063-2018 · Cited by 124 · see citing works
Self-citationBarisic, A., Leatherdale, S. T., & Kreiger, N. (2011) · Canadian Journal of Public Health · doi:10.1007/bf03404889 · Cited by 113 · see citing works
Troosters, T., Maltais, F., Leidy, N. K., Lavoie, K., Sedeno, M. F., Janssens, W., García‐Aymerich, J., Eržen, D., Sousa, D. D., Korducki, L., et al. (2018) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/rccm.201706-1288oc · Cited by 99 · see citing works
Self-citationHogg, L., Grant, A., Garrod, R., & Fiddler, H. (2012) · Journal of physiotherapy · doi:10.1016/s1836-9553(12)70110-8 · Cited by 93 · see citing works
Koolen, N., van Hees, H. W., van Lummel, R. C., Dekhuijzen, R. P. N., Djamin, R. S., Spruit, M. A., & Hul, A. J. V. ‘. (2019) · Journal of Clinical Medicine · doi:10.3390/jcm8030340 · Cited by 86 · see citing works
Seasonal Variations Affect Physical Activity and Pulmonary Rehabilitation Outcomes
Sewell, L., Singh, S. J., Williams, J. E., & Morgan, M. D. L. (2010) · Journal of Cardiopulmonary Rehabilitation and Prevention · doi:10.1097/hcr.0b013e3181e175f2 · Cited by 74 · see citing works
The PROactive innovative conceptual framework on physical activity
Dobbels, F., de Jong, C., Drost, E., Elberse, J., Feridou, C., Jacobs, L., Rabinovich, R., Frei, A., Puhan, M. A., de Boer, W. I., et al. (2014) · European Respiratory Journal · doi:10.1183/09031936.00004814 · Cited by 67 · see citing works
Self-citationWatz, H., Troosters, T., Beeh, K. M., García‐Aymerich, J., Paggiaro, P., Molins, E., Notari, M., Zapata, A., Jarreta, D., & Gil, E. G. (2017) · International Journal of COPD · doi:10.2147/copd.s143488 · Cited by 64 · see citing works
Self-citationInterval training induces clinically meaningful effects in daily activity levels in COPD
Louvaris, Z., Spetsioti, S., Kortianou, E. A., Vasilopoulou, M., Nasis, I., Kaltsakas, G., Koulouris, N. G., & Vogiatzis, I. (2016) · European Respiratory Journal · doi:10.1183/13993003.00679-2016 · Cited by 29 · see citing works
Self-citationHarvey‐Dunstan, T. C., Radhakrishnan, J., Houchen‐Wolloff, L., Tal‐Singer, R., Polkey, M. I., Morgan, M. D. L., STEINER, M. C., & Singh, S. (2014) · European Respiratory Journal · Cited by 1 · see citing works
Self-citationEfficacy and safety of extrafine glycopyrronium bromide pMDI (CHF 5259) in COPD patients
Hajoł, E., Piccinno, A., Viaud, I., Montagna, I., Guasconi, A., Vezzoli, S., Scuri, M., & Polkey, M. I. (2016) · doi:10.1183/13993003.congress-2016.pa4065 · Cited by 1 · see citing works
Self-citation
Flagged first, then by citations
Cited by
Sorted by citations
Martínez, F. J., Agustí, A., Celli, B. R., Han, M. K., Allinson, J. P., Bhatt, S. P., Calverley, P., Chotirmall, S. H., Badrul, C., Darken, P., et al. (2021) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/rccm.202107-1663so · Cited by 163 · see citing works
Demeyer, H., Mohan, D., Burtin, C., Vaes, A. W., Heasley, M. G., Bowler, R. P., Casaburi, R. H., Cooper, C. B., Corriol‐Rohou, S., Frei, A. L., et al. (2021) · Chronic Obstructive Pulmonary Diseases Journal of the COPD Foundation · doi:10.15326/jcopdf.2021.0213 · Cited by 97 · see citing works
Self-citationLung volume reduction surgery versus endobronchial valves: a randomised controlled trial
Buttery, S. C., BANYA, W. A. S., Bilancia, R., Boyd, E., Buckley, J., Greening, N. J., Housley, K., Jordan, S. J., Kemp, S. V., Kirk, A. J. B., et al. (2023) · European Respiratory Journal · doi:10.1183/13993003.02063-2022 · Cited by 68 · see citing works
Self-citationButtery, S. C., Zysman, M., Vikjord, S. A. A., Hopkinson, N. S., Jenkins, C. R., & Vanfleteren, L. E. G. W. (2021) · Respirology · doi:10.1111/resp.14032 · Cited by 68 · see citing works
Self-citationArmstrong, M., Hume, E., McNeillie, L., Chambers, F., Wakenshaw, L., Burns, G., Marshall, K. H., & Vogiatzis, I. (2021) · Respiratory Medicine · doi:10.1016/j.rmed.2021.106353 · Cited by 64 · see citing works
Self-citationListening to the patients’ voice: a conceptual framework of the walking experience
Delgado‐Ortiz, L., Polhemus, A. M., Keogh, A., Sutton, N., Remmele, W., Hansen, C., Kluge, F., Sharrack, B., Becker, C., Troosters, T., et al. (2023) · Age and Ageing · doi:10.1093/ageing/afac233 · Cited by 41 · see citing works
Self-citationMohan, D., Rossiter, H. B., Watz, H., Fogarty, C. M., Evans, R. A., Man, W. D., Tabberer, M. M., Beerahee, M., Kumar, S., Millns, H., et al. (2022) · Thorax · doi:10.1136/thorax-2021-218360 · Cited by 29 · see citing works
Self-citationButtery, S. C., Williams, P. J., Alghamdi, S. M., Philip, K. E. J., Perkins, A., Kallis, C., Quint, J. K., Polkey, M. I., Breuls, S., Buekers, J., et al. (2023) · European Respiratory Review · doi:10.1183/16000617.0134-2023 · Cited by 27 · see citing works
Self-citationActualización 2021 de la Guía Española de la EPOC (GesEPOC). Tratamiento no farmacológico
Cosío, B. G., Hernández, C., Chiner, E., Gimeno‐Santos, E., Pleguezuelos, E., Seijas, N., Comas, D. R., López-Campos, J. L., Soler‐Cataluña, J. J., Rubio, M. C., et al. (2021) · Archivos de Bronconeumología · doi:10.1016/j.arbres.2021.08.010 · Cited by 24 · see citing works
Self-citationJosa-Culleré, A., Basagaña, X., Koch, S., Etxarri, A. A., Balcells, E., de Basea, M. B., Celorrio, N., Foraster, M., Rodriguez‐Roisin, R., Marín, A., et al. (2024) · Environmental Research · doi:10.1016/j.envres.2024.118195 · Cited by 19 · see citing works
Koreny, M., Etxarri, A. A., de Basea, M. B., Foraster, M., Carsin, A., Cirach, M., Gimeno‐Santos, E., Barberán-García, A., Nieuwenhuijsen, M. J., Vall‐Casas, P., et al. (2022) · Environmental Research · doi:10.1016/j.envres.2022.113956 · Cited by 18 · see citing works
Self-citationSinging for lung health in COPD: a multicentre randomised controlled trial of online delivery
Philip, K. E. J., Buttery, S. C., Bowen, S., Lewis, A. P., Jeffery, E., Alghamdi, S. M., Williams, P. J., Alasmari, A., Alsulayyim, A. S., Orton, C. M., et al. (2024) · BMJ Open Respiratory Research · doi:10.1136/bmjresp-2024-002365 · Cited by 16 · see citing works
Self-citationMekhuri, S., Quach, S., Barakat, C., Sun, W., & Nonoyama, M. L. (2023) · Canadian Journal of Respiratory Therapy · doi:10.29390/001c.90653 · Cited by 16 · see citing works
Real-world walking cadence in people with COPD
Delgado‐Ortiz, L., Ranciati, S., Etxarri, A. A., Balcells, E., Buekers, J., Demeyer, H., Frei, A. L., Gimeno‐Santos, E., Hopkinson, N. S., de Jong, C., et al. (2024) · ERJ Open Research · doi:10.1183/23120541.00673-2023 · Cited by 14 · see citing works
Self-citation[Translated article] Spanish COPD Guidelines (GesEPOC 2021): Non-pharmacological Treatment Update
Cosío, B. G., Hernández, C., Chiner, E., Gimeno‐Santos, E., Pleguezuelos, E., Seijas, N., Comas, D. R., López-Campos, J. L., Soler‐Cataluña, J. J., Rubio, M. C., et al. (2022) · Archivos de Bronconeumología · doi:10.1016/j.arbres.2021.08.024 · Cited by 14 · see citing works
Self-citationMcGagh, D., Song, K., Yuan, H., Creagh, A. P., Fenton, S. A. M., Ng, W., Goldsack, J. C., Dixon, W. G., Doherty, A., & Coates, L. C. (2024) · The Lancet Rheumatology · doi:10.1016/s2665-9913(24)00186-3 · Cited by 13 · see citing works
Carthy, M. M., Burrows, K., Griffiths, P., Black, P. M., Demanuele, C., Karlsson, N., Buenconsejo, J., Patel, N. R., Chen, W.-H., & Cappelleri, J. C. (2023) · Therapeutic Innovation & Regulatory Science · doi:10.1007/s43441-023-00502-8 · Cited by 11 · see citing works
Self-citationUse of Ecological Momentary Assessment to Measure Dyspnea in COPD
Miller, S., Nichols, M. G., Teufel, R. J., Silverman, E. P., & Walentynowicz, M. (2024) · International Journal of COPD · doi:10.2147/copd.s447660 · Cited by 11 · see citing works
How do people with COPD walk? A European study on digitally measured real-world gait
Delgado‐Ortiz, L., Buekers, J., Chynkiamis, N., Demeyer, H., Frei, A. L., Gimeno‐Santos, E., Hansen, C., Hausdorff, J. M., Hopkinson, N. S., Jansen, C.-P., et al. (2025) · European Respiratory Journal · doi:10.1183/13993003.02303-2024 · Cited by 11 · see citing works
Self-citationFactors associated to physical activity in patients with COPD: An ecological approach
Blondeel, A., Hermans, F., Breuls, S., Wuyts, M., Everaerts, S., Gyselinck, I., Maeyer, N. D., Verniest, T., Derom, E., Janssens, W., et al. (2023) · Respiratory Medicine · doi:10.1016/j.rmed.2023.107424 · Cited by 11 · see citing works
Self-citationPhysical activity end-points in trials of chronic respiratory diseases: summary of evidence
Rist, C., Karlsson, N., Necander, S., & Silva, C. A. D. (2022) · ERJ Open Research · doi:10.1183/23120541.00541-2021 · Cited by 11 · see citing works
Self-citationIwakura, M., Kawagoshi, A., Tamaki, A., Oki, Y., Oshima, Y., & Spruit, M. A. (2023) · European Respiratory Review · doi:10.1183/16000617.0165-2022 · Cited by 11 · see citing works
Izmailova, E. S., Middleton, D., Yunis, R., Lakeland, J., Sowalsky, K. L., Kling, J., Ritchie, A., Guo, C. C., Byrom, B., & Kern, S. (2024) · Clinical and Translational Science · doi:10.1111/cts.70054 · Cited by 9 · see citing works
Aryal, S., Bachman, S. L., Lyden, K. A., & Clay, I. (2023) · JCO Clinical Cancer Informatics · doi:10.1200/cci.23.00055 · Cited by 7 · see citing works
Blondeel, A., Hermans, F., Breuls, S., Wuyts, M., Everaerts, S., Maeyer, N. D., Derom, E., Janssens, W., Demeyer, H., & Troosters, T. (2025) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/rccm.202501-0170oc · Cited by 5 · see citing works
Self-citationBlondeel, A., Demeyer, H., Ceulemans, L. J., Coolen, J., Everaerts, S., Geysen, H., Verleden, G. M., Raemdonck, D. E. V., Dooms, C., Troosters, T., et al. (2022) · ERJ Open Research · doi:10.1183/23120541.00150-2022 · Cited by 5 · see citing works
Self-citationSantana, A. V., Fontana1, A. D., Almeida, R. C., Mantoani, L. C., Camillo, C. A., Furlanetto, K. C., Rodrigues, F., Cruz, J., Marques, A. S. P. D. D., Jácome, C. I. O., et al. (2023) · Jornal Brasileiro de Pneumologia · doi:10.36416/1806-3756/e20220372 · Cited by 4 · see citing works
Self-citationTiller, N. B., Kinninger, A., Abbasi, A., Casaburi, R. H., Rossiter, H. B., Budoff, M. J., & Adami, A. (2022) · International Journal of COPD · doi:10.2147/copd.s385000 · Cited by 4 · see citing works
Adami, A., Duan, F., Calmelat, R., Chen, Z., Casaburi, R. H., & Rossiter, H. B. (2026) · Journal of Cachexia Sarcopenia and Muscle · doi:10.1002/jcsm.70178 · Cited by 3 · see citing works
Blondeel, A., Demeyer, H., Alcaraz-Serrano, V., Buttery, S. C., Buekers, J., Chynkiamis, N., Josa-Culleré, A., Delgado‐Ortiz, L., Frei, A. L., Glorie, L., et al. (2024) · Annals of the American Thoracic Society · doi:10.1513/annalsats.202404-432oc · Cited by 3 · see citing works
Self-citationWhat does the future hold for pulmonary rehabilitation?
Rochester, C. L., Langer, D., & Singh, S. J. (2021) · European Respiratory Society eBooks · doi:10.1183/2312508x.10019320 · Cited by 3 · see citing works
Soler‐Cataluña, J. J., Puente‐Maestu, L., Román-Rodríguez, M., Esteban, C., Gea, J., Bernabéu-Mora, R., Pleguezuelos, E., Ancochea, J., & Rio, F. G. (2022) · International Journal of COPD · doi:10.2147/copd.s381427 · Cited by 3 · see citing works
de Müllenheim, P., & Chambellan, A. (2022) · The Journal of Open Source Software · doi:10.21105/joss.04741 · Cited by 1 · see citing works
The construct validity of real-world digital mobility outcomes in people with COPD
Megaritis, D., Long, M., Heras, M. D. L., Alcaraz-Serrano, V., Alvarez, P., Becker, C., Braun, J., Buekers, J., Buttery, S. C., Caulfield, B., et al. (2026) · ERJ Open Research · doi:10.1183/23120541.00993-2025 · Cited by 1 · see citing works
Self-citationJosa-Culleré, A., Koch, S., Rivas, I., Gimeno‐Santos, E., Buekers, J., Delgado‐Ortiz, L., Alcaraz, V., Blanco, I., García-Olivé, I., Rodriguez, D. A., et al. (2026) · Thorax · doi:10.1136/thorax-2025-224411 · Cited by 1 · see citing works
Self-citationEnfermedad pulmonar obstructiva crónica y salud respiratoria
Yordi-León, A. C., Fernández, A. A., Villar-Alvarez, F., Centanaro, G. V., de Miguel‐Díez, J., Ortolá, M. V., & Alonso, T. (2023) · Revista de Patología Respiratoria · doi:10.24875/rpr.23000032 · Cited by 1 · see citing works
Buttery, S. C., BANYA, W. A. S., Bilancia, R., Boyd, E., Buckley, J., Greening, N. J., Housley, K., Jordan, S. J., Kemp, S. V., Kirk, A. J. B., et al. (2022) · SSRN Electronic Journal · doi:10.2139/ssrn.4199206
Self-citationEvaluation von körperlicher Aktivität
Osthoff, A.-K. R. (2022) · Springer eBooks · doi:10.1007/978-3-662-63613-8_26
Drug development for movement disorders
Nobbs, D., & Leyens, L. (2024) · Elsevier eBooks · doi:10.1016/b978-0-323-99494-1.00011-3
Müller, K., Schlesinger, T., & Wagner, P. (2024) · Zeitschrift für Pneumologie · doi:10.1007/s10405-024-00559-8
Gait and mobility assessment in cardio-respiratory conditions
Megaritis, D., Hume, E., Echevarria, C., & Vogiatzis, I. (2025) · Elsevier eBooks · doi:10.1016/b978-0-443-21484-4.00014-4
Self-citationCommunication About Sexuality (COSY) Encourages Physical Activity in COPD: A Randomised Trial
Lana, K. D., Frei, A. L., Radtke, T., Braun, J., Puhan, M. A., & Steurer-Stey, C. A. (2025) · International Journal of COPD · doi:10.2147/copd.s539514
Self-citationInfluence of basal physical activity and air quality on a walking programme in patients with COPD
Martin-Deleon, R., Jurado-García, A., Muñoz-Villanueva, M. C., Feu-Collado, N., Alburquerque‐Sendín, F., & Gámez, B. J. (2026) · BMJ Open Respiratory Research · doi:10.1136/bmjresp-2025-003275
- Authors
- Garcia-Aymerich, J., Puhan, M. A., Corriol-Rohou, S., de Jong, C., Demeyer, H., Dobbels, F., Erzen, D., Frei, A., Gimeno-Santos, E., Hopkinson, N. S., Ivanoff, N., Karlsson, N., Louvaris, Z., Polkey, M. I., Rabinovich, R. A., Scuri, M., Tabberer, M., Vogiatzis, I., & Troosters, T.
- Affiliations
- University of Zurich (CH)
- Universitair Ziekenhuis Leuven (BE)
- KU Leuven (BE)
- Imperial College London (GB)
- Almirall (Spain) (ES)
- AstraZeneca (Sweden) (SE)
- National and Kapodistrian University of Athens (GR)
- Royal Brompton & Harefield NHS Foundation Trust (GB)
- The Queen's Medical Research Institute (GB)
- Chiesi (Italy) (IT)
- GlaxoSmithKline (United Kingdom) (GB)
- ORCID
- Venue
- Thorax
- Publisher
- BMJ
- Published
- 2021-01-21
- Volume
- 76
- Issue
- 3
- Pages
- 228-238
- ISSN
- 0040-6376 (ISSN-L)
- 1468-3296
- PMC
- PMC7892393
- OpenAlex
- W3125972857
- Cited by
- 43
- References
- 22
- Citations by year
- 2026: 4 · 2025: 4 · 2024: 9 · 2023: 10 · 2022: 10 · 2021: 6
- FWCI
- 5.68
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Thorax (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- Northumbria Research Link (Northumbria University) (acceptedVersion)
- Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, cc-by-nc)
- Ghent University Academic Bibliography (Ghent University) (submittedVersion, cc-by-nc)
- Lirias (KU Leuven) (submittedVersion, other-oa)
- University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, cc-by)
- Repositori digital de la UPF (Universitat Pompeu Fabra) (submittedVersion, cc-by-nc)
- Spiral (Imperial College London) (submittedVersion, cc-by-nc)
- Zurich Open Repository and Archive (University of Zurich) (submittedVersion, cc-by-nc)
- University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, cc-by-nc)
- Zurich Open Repository and Archive (University of Zurich)
- Funders
- European Commission (IMI JU # 115011)
- Fonds Wetenschappelijk Onderzoek
- Royal Brompton and Harefield NHS Foundation Trust
- CERCA Programme, Generalitat de Catalunya
- NIHR Respiratory Biomedical Research Unit
- Topics
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Chronic Obstructive Pulmonary Disease (COPD) Research
- Social Sciences › Economics, Econometrics and Finance › Economics and Econometrics › Health Systems, Economic Evaluations, Quality of Life
- Health Sciences › Medicine › Physiology › Physical Activity and Health
- Keywords
- chronic obstructive pulmonary disease, physical activity, physical activity experience, minimal important difference, responsiveness, construct validity, internal consistency, pulmonary rehabilitation, COPD exacerbations, health-related quality of life, dyspnea, exercise capacity
- MeSH terms
- Exercise Therapy, Follow-Up Studies, Forced Expiratory Volume, Humans, Prospective Studies, Psychometrics, Quality of Life, Surveys and Questionnaires, Exercise, Exercise Tolerance, Pulmonary Disease, Chronic Obstructive
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
