Table 1:

Demographic and other characteristics and crude incidence rates of basal cell carcinoma in a cohort of U.S. radiologic technologists ^a, 1983-2005

Variable		Cases	Person-years	BCC Rate/1000 Person-Years
	Total	3,615	1,113,298	3.25
Gender	Men	796	219,504	3.63
	Women	2,819	893,794	3.15
Year of birth	< 1930	282	37,159	7.59
	1930-1934	266	46,059	5.78
	1935-1939	433	85,193	5.08
	1940-1944	539	145,278	3.71
	1945-1949	712	234,663	3.03
	1950-1954	804	313,808	2.56
	1955-1959	563	240,664	2.34
	1960+	16	10,474	1.53
Age at Baseline	<30	458	220,330	2.08
	30-39	1,429	523,524	2.73
	40-49	1,020	259,806	3.93
	40+	708	109,638	6.46
Education b	2-year hospital radiologic technologist program	1,464	470,860	3.11
	College or graduate school	1,555	439,744	3.54
	Other/unknown	596	202,694	2.94
UVR Score c	1 (lowest)	662	224,495	2.95
(quintiles)	2	707	219,793	3.22
	3	689	219,915	3.13
	4	747	220,546	3.39
	5 (highest)	760	211,287	3.60
	Unknown/missing	50	17,262	2.90
Age First Worked	<20 years old	1,546	495,535	3.12
	20-24 years old	1,623	500,182	3.24
	25-29 years old	261	67,796	3.85
	30+ years old	140	39,496	3.54
	Unknown/missing	45	10,288	4.37
Total Years Worked	<10 years	761	215,589	3.53
	10-19 years	765	234,118	3.27
	20-29 years	1,026	357,260	2.87
	30+ years	794	232,552	3.41
	Unknown/missing	269	73,778	3.65
First Year Worked	<1950	234	25,674	9.11
	1950-1959	717	135,886	5.28
	1960-1969	1,110	350,096	3.17
	1970+	1,509	591,354	2.55
	Unknown/missing	45	10,288	4.37
Absorbed dose to the skin of	<10	396	174,850	2.26
the head, neck and arms	10-25	705	256,795	2.75
(mGy)	25-50	885	294,775	3.00
	50-75	549	158,301	3.47
	75-100	327	85,168	3.84
	100-200	505	108,608	4.65
	200-300	155	22,506	6.89
	300-500	72	9,460	7.61
	500-750	16	2,142	7.47
	750+	5	694	7.20

^aCaucasian only

^bAssessed on the third questionnaire

^cBased on Total Ozone Mapping Spectrometer satellite instrument data. The UVR Score was created by ultraviolet radiation levels in mWatt/m² (based on linking residential location to NASA satellite data) for each of 5 age periods, weighting each ambient exposure for each age period by summer hours outdoors (weekend and weekdays) and creating a weighted cumulative average over the lifetime