Table 2 Frequencies of fulfilled 1982 ACR criteria

I. Malar rash

55.8% (592/1060)

39.2% (65/166)

< 0.0001

II. Discoid rash

24% (255/1060)

18.7% (31/166)

0.13

III. Photosensitivity

66.7% (707/1060)

43.4% (72/166)

< 0.0001

IV. Oral ulcer

24.7% (262/1060)

15.7% (26/166)

0.01

V. Arthritis

79.2% (840/1060)

69.9% (116/166)

0.007

VI. Serositis

41.1% (436/1060)

56% (93/166)

0.0003

 Pleuritis

36.2% (302/833)

47.1% (57/121)

0.02

 Pericarditis

16.6% (138/833)

27.3% (33/121)

0.004

VII. Renal disorder

29.9% (317/1060)

54.2% (90/166)

< 0.0001

 Proteinuria

22.5% (88/391)

47.2% (25/53)

0.0001

 Cellular casts

16.1% (63/390)

32.1% (17/53)

0.005

VIII. Neurological disorder

9.1% (97/1060)

11.4% (19/166)

0.35

 Seizures

7.2% (61/847)

10.2% (13/127)

0.23

 Psychosis

1.7% (14/847)

3.1% (4/127)

0.24

IX. Hematologic disorder

61.5% (652/1060)

60.2% (100/166)

0.76

 Hemolytic anemia

7.2% (61/846)

5.5% (7/127)

0.48

 Leukopenia

42.7% (362/847)

40.2% (51/127)

0.58

 Lymphopenia

35.6% (301/846)

32.3% (41/127)

0.47

 Thrombocytopenia

17.9% (152/847)

15.7% (20/127)

0.51

X. Immunologic disorder

65.8% (698/1060)

74.1% (123/166)

0.04

 Anti-dsDNA

59.5% (504/847)

66.1% (84/127)

0.15

 Anti-Sm

14% (118/845)

15% (19/127)

0.76

XI. ANA

98.3% (1042/1060)

98.2% (163/166)

0.92

 Number of fulfilled classification criteria (mean ± SD)

5.6 ± 1.5

5.4 ± 1.4

0.18