TABLE 4

Respiratory Symptoms Questionnaire (RSQ) differentiation of physician-assessed severity categories

AsthmaAsthma+COPDCOPDTotal sample
Patients5105105101530
RSQ scores# by physician-assessed severity
 Mild
  Patients with non-missing data18890122400
  Mean±sd3.32±3.275.06±4.134.11±3.713.95±3.67
 Moderate
  Patients with non-missing data186223150559
  Mean±sd4.12±3.745.15±3.955.47±4.044.89±3.94
 Severe
  Patients with non-missing data136197238571
  Mean±sd6.43±3.928.54±4.317.37±4.307.55±4.29
RSQ differentiation by physician-assessed severity
 Standardised mean differences+
  Mild versus moderate0.230.020.350.25
  Mild versus severe0.870.820.790.89
  Moderate versus severe0.600.820.450.64
 Group comparison
  Mild versus moderate0.10420.98400.02490.0017
  Mild versus severe<0.0001<0.0001<0.0001<0.0001
  Moderate versus severe<0.0001<0.0001<0.0001<0.0001
 F-value30.0241.4627.61109.85
 p-value<0.0001<0.0001<0.0001<0.0001

Data are presented as n, unless otherwise stated. COPD: chronic obstructive pulmonary disease. #: range 0–16; : for patients with asthma+COPD, physician-assessed severity was allocated as the higher of the two severity categories assigned by the physician for their asthma and their COPD; +: Cohen's d.