Table 2 . Characteristic of adult-onset FMF patients.

Age at the onset of symptoms (mean ± SD) yr	29 ± 7.8
Age at diagnosis (mean ± SD) yr	34.5 ± 9.7
Delayed diagnosis (mean ± SD) yr	5 ± 5.9
Duration of follow-up (mean ± SD) mo	20 ± 14.3
Duration of treatment (mean ± SD) mo	17 ± 13.6
Duration of attacks (mean ± SD) day	2 ± 0.76
Interval between attacks (mean ± SD) mo	2.3 ± 2.2
Positive family history of FMF	11 (25%)

SD, standard deviation; yr, year; mo, month