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. 2015 Jan 5;22(2):121–130. doi: 10.1530/ERC-14-0537

Table 2.

Demographic and clinical characteristics of TCGA THCA samples based on SDHx gene expression differences

Gene_scorea 0 1 2 3 4 P valueb
Mean of age_at_diagnosis (n) 44.98 (n=245) 47.37 (n=104) 50.14 (n=63) 50.60 (n=25) 52.93 (n=29) 0.015
Gender
 Female (n=343) 178 77 45 20 23 0.867
 Male (n=123) 67 27 18 5 6
Pathology_T
 T1 (n=135) 75 (55.6%) 22 (16.3%) 22 (16.3%) 7 (5.2%) 9 (6.7%) 0.051
 T2 (n=154) 83 (53.9%) 38 (24.7%) 15 (9.7%) 3 (1.9%) 15 (9.7%)
 T3 (n=156) 76 (48.7%) 40 (25.6%) 22 (14.1%) 14 (9%) 4 (2.6%)
 T4 (n=19) 9 (47.4%) 4 (21.1%) 4 (21.1%) 1 (5.3%) 1 (5.3%)
Pathology_N
 N0 (n=213) 106 (49.8%) 38 (17.8%) 38 (17.8%) 16 (7.5%) 15 (7.0%) <0.001
 N1 (n=207) 119 (57.5%) 57 (27.5%) 19 (9.2%) 7 (3.4%) 5 (2.4%)
 NX (n=46) 20 (43.5%) 9 (19.6%) 6 (13.0%) 2 (4.3%) 9 (19.6%)
Pathology_M
 M0 (n=252) 147 (58.3%) 51 (20.2%) 39 (15.5%) 10 (4.0%) 5 (2.0%) <0.001
 M1 (n=8) 8 (100%) 0 (0%) 0 (0%) 0 (0%) 0 (0%)
 MX (n=205) 90 (43.9%) 53 (25.9%) 24 (11.7%) 14 (6.8%) 24 (11.7%)
 NA (n=1) 0 (0%) 0 (0%) 0 (0%) 1 (100%) 0 (0%)
Pathology_stage
 Stage I (n=264) 145 (54.9%) 59 (22.3%) 37 (14.0%) 10 (3.8%) 13 (4.9%) 0.002
 Stage II (n=0) 0 0 0 0 0
 Stage III (n=104) 50 (48.1%) 29 (27.9%) 13 (11.5%) 11 (10.6%) 2 (1.9%)
 Stage IV (n=7) 6 (85.7%) 1 (14.3%) 0 (0%) 0 (0%) 0 (0%)
 NA (n=91) 44 (48.4%) 15 (16.5%) 14 (15.4%) 4 (4.4%) 14 (15.4%)
Histology
 Classic PTC (n=321) 189 (58.9%) 73 (22.7%) 38 (11.8%) 11 (3.4%) 10 (3.1%) <0.001
 FvPTC (n=99) 36 (36.4%) 17 (17.2%) 16 (16.2%) 12 (12.1%) 18 (18.2%)
 TallCell PTC (n=35) 14 (40.0%) 12 (34.3%) 8 (22.9%) 1 (2.9%) 0 (0%)
 Others (n=11) 6 (54.5%) 2 (18.2%) 1 (9.1%) 1 (9.1%) 1 (9.1%)
a

Gene_score (range from 0 to 4) was calculated by first categorizing each gene's expression as either 1 as higher than normal, or 0 as lower than normal, then adding up the binary score for each of these SDHA–D genes.

b

P value was calculated by one-way ANOVA for age_at_diagnosis with degree of freedom of 4, and by Pearson χ2 test for the rest of comparisons.