Although outpatient, emergency department, and hospital visits have been used as indicators of sickle cell disease severity,
the relationship between painful episodes and subsequent use of health care is unclear. In this study, 232 patients with sickle
cell disease completed a daily diary for 6 months, providing 31 017 patient-days of observation. Patients reported pain on
56% of total patient-days, crises on 15%, and health care utilization on 4%. Patients usually managed increased pain without
assistance from the health care system.