Table 1.

Frequency of BILAG A, B, or A/B flares by organ system, per person-year.

Organ System	A	B	A or B	Two B Flares
Any organ	0.254	1.637	1.765	0.502
General	0.000	0.016	0.016
Mucocutaneous	0.059	0.370	0.429
Neurologic	0.023	0.016	0.040
Musculoskeletal	0.013	0.313	0.327
Cardiorespiratory	0.003	0.030	0.033
Vasculitis	0.030	0.046	0.076
Renal	0.102	0.469	0.571
Hematologic	0.033	0.868	0.901