Table 2

Missing values

SGRQCRQ
% of missing values per question (range)0–58% 0–10%2-150 0–5.3%
% of missing values per patient2.0% 0.25%2-150 0.54%

  • ↵2-150 When questions 6 and 8 of Part 1 are excluded.

  • SGRQ = St George’s Respiratory Questionnaire; CRQ = Chronic Respiratory Disease Questionnaire.