“…Markers of shortened survival include low FEV 1 , 6-min walk test (6MWT) distance b400 m, room air hypoxemia (SpO 2 b 88% or P a O 2 b 55 mmHg, at rest or with exertion; at sea level), hypercarbia (P a CO 2 N 50 mmHg, confirmed on arterial blood gas), pulmonary hypertension (PA systolic pressure N 50 mmHg on echocardiogram or evidence of right ventricular dysfunction in the absence of a tricuspid regurgitant jet), BMI b18 kg/m 2 for adults (or BMI less than 5th percentile for children), increased frequency of pulmonary exacerbations (N2 exacerbations per year requiring IV antibiotics or one exacerbation requiring positive pressure ventilation), massive hemoptysis, or pneumothorax [1,[12][13][14][15][16][17][18][19]25,43,44]. Additionally, a low physical functioning score on the CFQ-R questionnaire has been associated with reduced survival and, while there was no consensus recommendation for use of CFQ-R in routine clinical practice, a Physical score b 30 could be considered alongside other markers of shortened survival in the decision to refer for transplant [44,45].…”