Table:
Characteristics	All (n = 578)	Male (n = 247)	Female (n = 331)	Pa
Age at onset (mean ± SD)	36.8 ± 12.4	35.2 ± 12.1	37.8 ± 12.0	0.013b
Observation period (mean ± SD)	9.2 ± 9.2	8.2 ± 7.6	9.6 ± 8.4	0.036b
HLA-B51, n (%)	177/352 (50.3)	88/170 (51.8)	89/182 (48.9)	0.59
Oral ulcer, n (%)	572 (99.0)	246 (99.6)	326 (98.5)	0.11
Genital ulcer, n (%)	417 (72.3)	141 (57.3)	276 (83.4)	<0.0001
Eye involvement, n (%)	356 (61.6)	181 (73.3)	175 (52.9)	<0.0001
Skin involvement, n (%)	513 (88.8)	212 (85.8)	301 (90.9)	0.055
Arthritis, n (%)	301 (52.1)	104 (42.1)	197 (59.5)	<0.0001
Epididymitis, n (%)	14 (2.4)	14 (5.7)
Gastrointestinal involvement, n (%)	71(12.3)	26 (10.5)	45 (13.6)	0.069
CNS involvement, n (%)	59 (10.2)	34 (13.8)	25 (7.6)	0.015
Vascular involvement, n (%)	46 (8.0)	25 (10.1)	21 (6.3)	0.097
Fulfilling ISG, n (%)	517 (89.4)	213 (86.2)	304 (91.8)	0.030

Parse the following content of the photo in markdown code: | Characteristics | All (n = 578) | Male (n = 247) | Female (n = 331) | Pa | 
 | --- | --- | --- | --- | --- | 
 | Age at onset (mean ± SD) | 36.8 ± 12.4 | 35.2 ± 12.1 | 37.8 ± 12.0 | 0.013b | 
 | Observation period (mean ± SD) | 9.2 ± 9.2 | 8.2 ± 7.6 | 9.6 ± 8.4 | 0.036b | 
 | HLA-B51, n (%) | 177/352 (50.3) | 88/170 (51.8) | 89/182

(48.9) | 0.59 | 
 | Oral ulcer, n (%) | 572 (99.0) | 246 (99.6) | 326 (98.5) | 0.11 | 
 | Genital ulcer, n (%) | 417 (72.3) | 141 (57.3) | 276 (83.4) | <0.0001 | 
 | Eye involvement, n (%) | 356 (61.6) | 181 (73.3) | 175 (52.9) | <0.0001 | 
 | Skin involvement, n (%) | 513 (88.8) | 212 (85.8) | 301 (90.9) | 0.055 | 
 | Arthritis, n (%) | 301 (52.1) | 104 (42.1) | 197 (59.5) | <0.0001 | 
 | Epididymitis, n (%) | 14 (2.4) | 14 (5.7) |  |  | 
 | Gastrointestinal involvement, n (%) | 71(12.3) | 26 (10.5) | 45 (13.6) | 0.069 | 
 | CNS involvement, n (%) | 59 (10.2) | 34 (13.8) | 25 (7.6) | 0.015 | 
 | Vascular involvement, n (%) | 46 (8.0) | 25 (10.1) | 21 (6.3) | 0.097 | 
 | Fulfilling ISG, n (%) | 517 (89.4) | 213 (86.2) | 304 (91.8) | 0.030 |