Thyroid Cancer Incidence in New Jersey: Time Trend, Birth Cohort and Socioeconomic Status Analysis (1979–2006)

Table 3

Thyroid cancer incidence rates and rate ratios by socioeconomic status (SES) category, New Jersey, 1998–2002, 𝑁=3,924^a.

SES category^b	Total			Male			Female
	Cases	Rate^c	Rate ratio^d	Cases	Rate^c	Rate ratio^d	Cases	Rate^c	Rate ratio^d
Category 1	1,281	10.6		324	5.5		957	15.4
Category 2	1,185	10.2	1.0	300	5.5	1.0	885	14.7	1.0
Category 3	898	8.3	0.8*	225	4.5	0.8*	673	12.0	0.8*
Category 4	560	6.5	0.6*	116	3.0	0.5*	444	9.7	0.6*

^aData are from the New Jersey State Cancer Registry, New Jersey Department of Health and Senior Services, November 2008 analytic file. All primary invasive cases of thyroid cancer diagnosed between 1998 and 2002 are included except cases identified only through death certificates or autopsy reports and cases not geocoded to a census tract (𝑛=51).
^bCensus tracts were grouped into SES quartiles using the deprivation index scores. The deprivation index was developed with New Jersey 2000 U.S. Census data using principle component analysis. Census tract deprivation index scores in Category 1 were –2.23 to –0.71, in Category 2 were –0.72 to –0.14, in Category 3 were –0.13 to 0.59, and in Category 4 were 0.60 to 0.32. Category 1 is the highest SES category and Category 4 the lowest SES category.
^cRates are age-adjusted to the 2000 U.S. Standard Population, direct method, and are expressed as the number of cases per 100,000 population.
^dThe rate ratio is the rate for this SES category divided by the rate for SES Category 1 (referent rate).
*The rate for this SES category is significantly lower than the rate for SES Category 1, 𝑃<0.05.