Table 2.

Baseline characteristics of the study patients.

Characteristics	Persistent LAC and/or aPL ≥ 40 U, n = 17	LAC and aPL Transiently Positive or Negative, n = 73	p^*
Age at last aPL/LAC, mean (SD) yrs	41 (16)	39 (13)	0.80
Women, n (%)	14 (83)	69 (95)	0.12
Race, n (%) African American^**	3 (27)	41 (64)	0.02
Ethnicity, n (%) Hispanic	12 (75)	32 (46)	0.03
HCQ, n (%)	11 (65)	65 (89)	0.02
Aspirin, n (%)	6 (35)	14 (19)	0.29
Prednisone, n (%)	11 (65)	60 (83)	0.10
Immunosuppressives, n (%)	5 (29)	35 (49)	0.18
Anticoagulation ever for arterial or venous thrombosis or for pregnancy complication, n (%)	7 (41)	13 (18)	0.02
Duration on HCQ, mo, median (IQR)	49 (31, 61)	36 (19, 56)	0.38
Time between first and last aPL/LAC measurement, mo, median (IQR)	18 (9, 42)	25 (13, 38)	0.60
Charlson comorbidity, median (IQR)	4.0 (2.0, 7.0)	5.0 (2.0, 7.0)	0.81

↵* p values in bold type indicate statistical significance.
↵** Race information not available for 15 patients. aPL: antiphospholipid antibodies; LAC: lupus anticoagulant; HCQ: hydroxychloroquine; IQR: interquartile range.