• The PROactive instruments to measure physical activity in patients with chronic obstructive pulmonary disease 

      Gimeno-Santos, Elena; Raste, Yogini ; Demeyer, Heleen; Louvaris, Zafeiris; De Jong, Corina; Rabinovich, Roberto Alejandro; Hopkinson, Nicholas; Polkey, Michael I.; Vogiatzis, Ioannis; Tabberer, Maggie; Dobbels, Fabienne; Ivanoff, Nathalie; De Boer, Willem I.; Van der Molen, Thys; Kulich, Karoly; Serra, Ignasi; Basagaña, Xavier; Troosters, Thierry; Puhan, Milo A.; Karlsson, Niklas; Garcia Aymerich, Judith (European respiratory journal, 2015, 46(4):988-1000, 2015-06)
      No current patient-centred instrument captures all dimensions of physical activity in chronic obstructive pulmonary disease (COPD). Our objective was item reduction and initial validation of two instruments ...