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Table 4 Characteristics of the YOFMF, AOFMF, and LOFMF patients in a sensitivity analysis removing patients with mutations in exon 10 or overlapping rheumatic diseases (univariate analyses)

From: Musculoskeletal manifestations occur predominantly in patients with later-onset familial Mediterranean fever: Data from a multicenter, prospective national cohort study in Japan

Variable

YOFMF (n = 91)

AOFMF (n = 74)

LOFMF (n = 61)

p value

YOFMF vs AOFMF vs LOFMF

YOFMF vs others

Others vs LOFMF

Typical FMF

33/91 (36%)

25/74 (34%)

25/61 (41%)

0.68

1.00

0.44

Family history

15/91 (16%)

9/74 (12%)

6/61 (10%)

0.47

0.32

0.51

Exon 1 mutations (+)

11/91 (12%)

6/74 (8%)

0/61 (0%)

0.021

0.041

0.0078

Exon 2 mutations (+)

62/91 (68%)

58/74 (78%)

40/61 (66%)

0.20

0.55

0.32

Exon 3 mutations (+)

22/91 (24%)

14/74 (19%)

12/61 (20%)

0.67

0.41

0.86

More than two MEFV mutations (+)

48/91 (53%)

39/74 (53%)

24/61 (39%)

0.20

0.42

0.10

Thoracic pain

17/91 (19%)

19/74 (26%)

17/61 (28%)

0.36

0.20

0.38

Abdominal pain

55/91 (60%)

34/74 (46%)

13/61 (21%)

< 0.0001

0.0002

< 0.0001

Arthritis

40/91 (44%)

39/74 (53%)

39/61 (64%)

0.053

0.043

0.036

Myalgia

4/76 (5%)

12/56 (21%)

12/42 (29%)

0.0018

0.0007

0.016

  1. Number (percentage) presented. p values established using Fisher’s exact test or Mann–Whitney U test
  2. YOFMF young-onset FMF, AOFMF adult-onset FMF, LOFMF late-onset FMF, FMF familial Mediterranean fever, MEFV Mediterranean fever gene