Table 3—

Factor loading for salmeterol patients only

AQLQ activities1111
AQLQ environment1111
AQLQ symptoms1111
AQLQ emotions1111
FEV1 % pred2222
PEF pm2222
PEF am2222
Night-time waking3333
Night-time β2‐agonist use3333
Night-time symptoms3,43,44,34,3
Nights without β2‐agonist %3333
Nights without waking %3333
Short of breath daytime4444
Activity limitation4444
ΔPEF am–pm4NoneNoneNone
Chest tightness daytime4444
Wheeze daytime4444
β2‐agonist use daytime4444
Days without β2‐agonist %None444
  • Factors (1, 2, 3 or 4) onto which each of the 21 items loaded with statistical significance

  • If an item loaded on two factors, the one onto which it loaded most strongly is shown first

  • AQLQ: Asthma Quality of Life Questionnaire

  • FEV1: forced expiratory volume in one second

  • PEF: peak expiratory flow

  • FVC: forced vital capacity

  • FEF: forced expiratory flow