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. 2013;12(1):1–8.

Table 5.

Associations of disease severity and age, disease duration, attack intervals, and number of presenting symptoms

Total Chronic Mild-moderate Advanced - Accelerated Aggressive - Malignant P

Mean ± SD Median (Range) Mean ± SD Median (Range) Mean ± SD Median (Range) Mean ± SD Median (Range) Mean ± SD Median (Range)
Age (years) 34.0 ± 10.0 33.0 (12-58) 30.0 ± 8.0 30 (15-46) 33.0 ± 10.0 32 (12-55) 35.0 ± 10.0 34 (17-58) 37.0 ± 10.0 37 (16-58) < 0.001
Disease duration (years) 7.6 ± 5.6 6.0 (1-30) 6.2 ± 3.5 5 (3-16) 7.4 ± 6.2 5 (1-30) 8.5 ± 5.4 8 (1-25) 7.7 ± 5.2 6 (1-29) 0.022
Age at disease onset (years) 26.4 ± 8.7 24.5(5-54) 24.0 ± 6.9 23 (11-43) 25.8 ± 8.8 24 (10-54) 26.7 ± 8.5 24 (5-47) 29.0 ± 9.4 27 (14-51) < 0.001
Number of symptoms 2.0 ± 1.5 1.5(0-11) 1.5 ± 0.9 1(0-4) 1.9 ± 1.3 1 (0-8) 2.2 ± 1.6 2 (0-8) 2.6 ± 1.9 2 (1-11) < 0.001
Interval between the 1st and 2nd attacks (Months) 26.0 ± 35.0 12.0 (0-204) 30.0 ± 25.0 24 (3-132) 34.0 ± 40.0 12(0-204) 21.0 ± 33.0 12 (0-180) 11.0 ± 20.0 3 (0-108) < 0.001