Table 1.

Distribution of selected characteristics of the papillary thyroid cancer cases and controls.

	Cases (n=250)	Controls (n=250)	p-valuea
Age			0.10
<40	51	34
40–49	69	76
50–59	78	72
60–69	40	45
≥70	12	23
Years of Education			0.02
High school or less	72	41
Technical school	14	14
College	99	123
Graduate/Professional school	54	66
Other	9	5
Poverty Level			0.14
Below Poverty Level	10	2
Above poverty level	173	171
Unknown	69	75
Family Income			0.65
<24,999	17	20
25,000–49,999	29	23
50,000–89,999	45	37
>90,000	90	95
Refused	66	74
Missing	3	1
BMI			0.06
<25	90	111
25–29.99	75	76
≥ 30	85	63
Family History of Cancer			0.05
No	76	77
Thyroid Cancer	42	24
Other Cancer	132	149
Thyroid Disease			<0.0001
Yes	38	4
No	212	246
Smoking			0.34
Yes	75	85
No	175	165
Alcohol Consumption			0.001
Yes	95	127
No	155	123
Dental X-Rays			0.37
Never	9	5
Less than every few years	90	105
Every few years	35	41
Once a year	97	89
More than once a year	14	8
Unknown	5	2
Prior Diagnostic Medical Radiation Exposure			0.35
Yes	233	233
No	17	15
Unknown	0	2
Tumor Diameter			-
≤ 1 cm	140	-
>1cm	110	-

^aP-value corresponds to χ² test.