Quick Systemic Lupus Activity Questionnaire (Q-SLAQ): a simplified version of SLAQ for patient-reported disease activity.

Q-SLAQ and the original SLAQ performed equally well, demonstrating that the shorter Q-SLAQ can safely be used to monitor patients' perception of disease impact/activity. We also noted an intriguing discrepancy between physicians' and patients' evaluations of pulmonary/respiratory symptoms, which requires further investigations.