Four studies were evaluated regarding the factors affecting body weight, dietary intake and quality of life for patients with COPD. Patients with COPD may have more impairment with activities of daily living. In addition, patients with COPD who are malnourished (as defined by BMI) may have lower lung function measurements, more dyspnea, and lower nutritional intakes.

• Grade I means there is Good/Strong evidence supporting the statement;
• Grade II is Fair;
• Grade III is Limited/Weak;
• Grade IV is Expert Opinion Only;
• Grade V is Not Assignable.
• High (A) means we are very confident that the true effect lies close to that of the estimate of the effect;
• Moderate (B) means we are moderately confident in the effect estimate;
• Low (C) means our confidence in the effect estimate is limited;
• Very Low (D) means we have very little confidence in the effect estimate.
• Ungraded means a grade is not assignable.