Table 1 Comparison of clinical manifestations between dermatomyositis patients with acute/subacute interstitial pneumonia and without acute/subacute interstitial pneumonia ^a

Number of patients

17

24

16

Age, yr

54.0 (36 to 65)

54.5 (19 to 78)

36 (15 to 85)

Female, n (%)

14 (82.4)

20 (83.3)

15 (93.8)

Duration, mo

2 (1 to 19)

33 (1 to 148)^***

11 (1 to 237)^**

Muscle weakness, n (%)

4 (23.5)

15 (62.5)^*

15 (94.1)^***

WBCs, count/ml

5,200 (2,900 to 12,300)

8,165 (2,900 to 14,990)

7,590 (3,540 to 11,580)

Hb, g/dl

11.6 (7.9 to 13.9)

12.8 (10 to 15.4)

12.5 (9.8 to 15.3)

Plt, ×10⁵/μl

22.2 (14.9 to 34.5)

23.0 (12 to 38.8)

20.6 (6.2 to 37.7)

CK, IU/L

209 (33 to 866)

1,289 (16 to 12,300)

568 (51 to 2,646)

AST, IU/L

74 (31 to 219)

30 (14 to 657)^**

44 (12 to 132)^*

ALT, IU/L

42 (19 to 111)

20 (11 to 301)^*

31 (10 to 150)

γ-GTP, IU/L

43 (16 to 346)

24 (10 to 131)

26 (10 to 165)

LDH, IU/L

392 (225 to 957)

273 (186 to 1,975)^*

328 (157 to 489)^*

Ferritin, ng/ml

875 (251 to 2,171)

88 (16 to 4,853)^***

105 (39 to 400)^***

KL-6, U/ml

959 (338 to 2,048)

525 (188 to 1,802)^*

224 (125 to 459)^***

PGRN, ng/ml

228 (70 to 586)

75 (43 to 221)^***

79 (31 to 207)^***

CRP, mg/dl

0.86 (0.03 to 2.97)

0.24 (0.03 to 3.66)^**

0.08 (0.01 to 0.9)^***

ANA >160, n (%)

1 (5.9)

2 (8.3)

5 (31.3)

Anti-Jo-1, n (%)

0 (0)

4 (16.7)

0 (0)