| |
Cases (n = 100)
|
Control (n = 100)
| |
|---|
|
N or %a
|
N or (%)a
|
p-valueb
|
|---|
|
Age
| | |
0.47
|
|
< 40
|
23
|
17
| |
|
40–49
|
24
|
28
| |
|
50–59
|
39
|
31
| |
|
60–69
|
19
|
15
| |
|
> =70
|
4
|
9
| |
|
Years of education
| | |
0.009
|
|
High school or less
|
25
|
9
| |
|
College/Technical school
|
47
|
55
| |
|
Graduate/Professional school
|
25
|
35
| |
|
Other
|
3
|
1
| |
|
Family income
| | |
0.83
|
|
Below poverty level
|
6
|
5
| |
|
Above poverty level
|
71
|
68
| |
|
Unknown
|
23
|
27
| |
|
BMI
| | |
0.18
|
|
< 25
|
32
|
38
| |
|
25–29.99
|
32
|
38
| |
|
> =30
|
36
|
24
| |
|
Family history of thyroid cancer
| | |
0.39
|
|
No
|
49
|
49
| |
|
Thyroid Cancer
|
16
|
10
| |
|
Other Cancer
|
35
|
41
| |
|
Thyroid disease
| | |
0.02
|
|
Yes
|
14
|
4
| |
|
No
|
86
|
96
| |
|
Smoking
| | |
0.76
|
|
Yes
|
29
|
32
| |
|
No
|
71
|
68
| |
|
Alcohol consumption
| | |
0.20
|
|
Yes
|
37
|
47
| |
|
No
|
63
|
53
| |
|
Tumor diameter
| | |
–
|
|
≤ 1 cm
|
47
|
–
| |
|
> 1 cm and ≤ 2 cm
|
29
|
–
| |
|
> 2 cm
|
22
|
–
| |
|
Not available
|
2
|
–
| |
- aThe frequency and percentage are equivalent because the number of cases and controls each equals 100
- bBased on chi-squared test or Fisher’s exact test when ≥1 cell has an expected frequency ≤ 5
