Open Access
Research Article

Table 1

Characteristics of the study population.

XUUB total
Xining
Urumqi
Ulm
Besançon
p-value Europe
China
p-value
n = 200 n = 50 n = 50 n = 50 n = 50 n = 100 n = 100
Sex 0.048 0.777
 Male 97 (49) 20 (40) 27 (64) 19 (38) 31 (62) 50 (50) 47 (47)
 Female 103 (51) 30 (60) 23 (46) 31 (62) 19 (38) 50 (50) 53 (53)
Age 47.1 ± 18.6 36 ± 12.4 36.9 ± 13.1 53 ± 17.5 62.5 ± 16.4 <0.001 <0.001
  < 18 years 7 (4) 4 (8) 2 (4) 1 (2) 0 (0) 1 (1) 6 (6)
 18–40 years 60 (30) 20 (40) 27 (54) 11 (22) 2 (4) 13 (13) 47 (47)
 41–60 years 74 (37) 26 (52) 17 (34) 14 (28) 17 (34) 31 (31) 43 (43)
 61–80 years 43 (22) 0 (0) 4 (8) 23 (46) 16 (32) 39 (39) 4 (4)
  > 81 years 16 (8) 0 (0) 0 (0) 1 (2) 15 (30) 16 (16) 0 (0)
Number of lesions 1 (1–2) 1 (1–2) 1 (1–2) 1 (1–4) 1 (1–2) 0.248 1 (1–2) 1 (1–2) 0.091
 1 lesion 162 (81) 46 (92) 44 (88) 32 (64) 40 (80) 81 (81) 90 (90)
 2–3 lesions 30 (15) 4 (8) 5 (10) 12 (24) 9 (18) 21 (21) 9 (9)
 4–6 lesions 6 (3) 0 (0) 1 (2) 4 (8) 1 (2) 5 (5) 1 (1)
  > 6 lesions 2 (1) 0 (0) 0 (0) 2 (4) 0 (0) 2 (2) 0 (0)
Size of the largest lesion 95.5 ± 50.9 102.2 ± 46.4 135.3 ± 45.8 80.8 ± 50 63.7 ± 29.6 <0.001 72.26 41.76 118.72 48.81 <0.001
 Type I 35.7 ± 34.5 76.5 ± 43.1 19.4 ± 12.3 19.4 ± 12.3 76.5 ± 43.1
 Type II 67.5 ± 36 83.6 ± 31.1 108 ± 58.6 55.1 ± 27.1 59.9 ± 25.7 57 ± 26.3 93.3 ± 44
 Type III 113.4 ± 48.5 116.6 ± 46.6 145.5 ± 43.1 121 ± 42 68.4 ± 28.3 92 ± 43.7 129.6 ± 46
 Type IV 55.9 ± 28.1 56.3 ± 18.7 125 68 34.8 ± 19 41.4 ± 22.2 63.9 ± 28.8
 Type V 123.4 ± 52.4 145.5 ± 3.5 160 ± 26.5 75.8 ± 48.9 75.8 ± 48.9 155.2 ± 21.9

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