Regional Variation across Canadian Centers in Radioiodine Administration for Thyroid Remnant Ablation in Well-Differentiated Thyroid Cancer Diagnosed in 2000–2010
Table 2
Patients with well-differentiated thyroid cancer over time (all centers combined).
Year of diagnosis
TNM stage
Number/year
T1
T2
T3
T4
N1a/N1b
N0/Nx
N1a/N1b
N0/Nx
N1a/N1b
N0/Nx
N1a/N1b
N0/Nx
2000
5 (4)
54 (39)
5 (4)
42 (30)
7 (5)
22 (16)
3 (2)
2 (1)
140
2001
10 (7)
49 (36)
5 (4)
35 (26)
12 (9)
16 (12)
7 (5)
3 (2)
137
2002
17 (10)
67 (41)
4 (3)
39 (24)
9 (6)
21 (13)
3 (2)
3 (2)
163
2003
13 (8)
63 (38)
2 (1)
49 (29)
8 (5)
28 (17)
2 (1)
3 (2)
168
2004
13 (6)
92 (44)
5 (2)
50 (24)
10 (5)
32 (15)
6 (3)
0 (0)
208
2005
18 (6)
128 (43)
8 (3)
74 (25)
19 (6)
43 (14)
7 (2)
2 (0.7)
299
2006
18 (6)
137 (43)
14 (4)
96 (30)
20 (6)
34 (11)
0 (0)
2 (0.6)
321
2007
19 (6)
148 (41)
10 (3)
79 (22)
39 (11)
61 (17)
4 (1)
3 (0.8)
363
2008
46 (10)
182 (39)
23 (5)
84 (18)
46 (10)
72 (16)
9 (2)
2 (0.4)
464
2009
18 (4)
194 (40)
23 (6)
83 (20)
34 (8)
62 (15)
6 (1)
1 (0.2)
421
2010
30 (8)
155 (40)
16 (4)
83 (21)
40 (10)
55 (14)
7 (2)
2 (0.5)
388
P-trend (2000–2010)
NS
NS
0.03
<0.01
<0.01
NS
NS
<0.01
P-trend (2006–2010)
NS
NS
NS
0.01
NS
NS
NS
NS
Number/stage
207
1269
115
714
244
446
54
23
3072
Data are presented as n (%), with the percentage referring to fraction of patients per year. Percentage values are rounded to the nearest number, unless <1%. Trend analysis was done to for TN stage as fraction of total number of patients per year. Only two centers (London and Winnipeg) included patients before 2006; therefore, a separate trend analysis was performed for 2006–2010. NS: nonsignificant.
