The geographic distribution of melanoma incidence in Massachusetts, adjusted for covariates

Table 1 Age-adjusted male invasive melanoma cancer statistics for the purely spatial analyses, Massachusetts, 1990–1999.

High Areas	1	2	3	4	5	6	7
No Covariate adjustment
Obs¹	478	719	494	57	183	*	*
RR²	1.62	1.38	1.46	2.26	1.49	*	*
p-value	<0.0001	<0.0001	<0.0001	0.001	0.005	*	*
Percent Urban adjustment
Obs¹	403	719	618	57	*	76	*
RR²	1.51	1.37	1.36	2.35	*	1.80	*
p-value	<0.0001	<0.0001	<0.0001	0.0003	*	0.038	*
SES adjustment
Obs¹	358	564	*	*	*	*	*
RR²	1.72	1.29	*	*	*	*	*
p-value	<0.0001	0.0002	*	*	*	*	*
SES & Percent Urban adjustment
Obs¹	173	*	*	*	*	*	282
RR²	1.66	*	*	*	*	*	1.38
P-value	<0.0001	*	*	*	*	*	0.003
Low Areas	A	B	C	D	E	F	G	H
No Covariates adjustment
Obs¹	157	58	17	49	303	32	40	*
RR²	0.49	0.39	0.25	0.44	0.72	0.41	0.48	*
p-value	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	0.002	*
Percent Urban adjustment
Obs¹	157	58	17	275	420	*	21	*
RR²	0.52	0.39	0.25	0.72	0.75	*	0.40	*
p-value	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	*	0.008	*
SES adjustment
Obs¹	*	58	*	395	*	*	*	418
RR²	*	0.49	*	0.72	*	*	*	0.78
p-value	*	<0.0001	*	<0.0001	*	*	*	0.0008
SES & Percent Urban adjustment
Obs¹	*	54	*	418	*	*	*	418
RR²	*	0.49	*	0.80	*	*	*	0.79
P-value	*	<0.0001	*	0.015	*	*	*	0.001

¹Obs = observed cases. ²RR = relative risk. *Cluster not significant for this analysis.

ISSN: 1476-072X