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

Table 4 Age-adjusted female invasive melanoma statistics for space-time analyses of Massachusetts, 1990–1999.

Highs	1	2	3	4	5	6
Time frame	96–99	94–99	92–99	96–99	93–99	97–99
No Covariate adjustment
Obs¹	371	305	*	293	161	189
RR²	1.97	2.03	*	1.68	1.66	1.53
p-value	<0.0001	<0.0001	*	<0.0001	0.001	0.027
Percent Urban adjustment
Obs¹	367	245	499	114⁷	*	228⁶
RR²	1.93	1.81	1.50	1.96	*	1.51
p-value	<0.0001	<0.0001	<0.0001	<0.0001	*	0.003
SES adjustment
Obs¹	306	305	*	238⁸	*	*
RR²	1.68	1.99	*	1.67	*	*
p-value	<0.0001	<0.0001	*	<0.0001	*	*
SES & Percent Urban adjustment
Obs¹	306	202¹¹	*	236⁸	*	*
RR²	1.63	1.83	*	1.68	*	*
P-value	<0.0001	<0.0001	*	<0.0001	*	*
Lows	A	B	C	E	F	G	J
Time frame	90–97	90–99	90–96	90–97	90–95	90–96	90–92
No Covariates adjustment
Obs¹	114	64	187	87	146	178	58
RR²	0.47	0.41	0.59	0.54	0.60	0.57	0.53
p-value	<0.0001	<0.0001	<0.0001	0.0002	<0.0001	<0.0001	0.027
Percent Urban adjustment
Obs¹	108⁴	245⁵	187	87	†⁶	178	64
RR²	0.48	1.81	0.61	0.54	0.08	0.58	0.53
p-value	<0.0001	<0.0001	<0.0001	<0.0001	0.0004	<0.0001	0.005
SES adjustment
Obs¹	*	*	187	149⁹	74¹⁰	*	68
RR²	*	*	0.64	0.63	0.45	*	0.52
p-value	*	*	<0.0001	<0.0001	<0.0001	*	<0.0001
SES & Percent Urban adjustment
Obs¹	*	*	214	149⁹	74¹⁰	*	64
RR²	*	*	0.70	0.64	0.46	*	0.51
P-value	*	*	0.007	0.003	<0.0001	*	0.002

¹Obs = observed cases. ²RR = relative risk. ³The time frame for High 7 when adjusting for percent urban is 95–99. ⁴The time frame for Low A when adjusting for percent urban is 90–98. ⁵The time frame for Low B when adjusting for percent urban is 90–98. ⁶The time frame for Low F when adjusting for percent urban is 90–91. ⁷The time frame for High 4 when adjusting for percent urban is 90–99. ⁸The time frame for High 4 when adjusting for SES is 97–99. ⁹The time frame for Low E when adjusting for SES and SES with percent urban is 90–95. ¹⁰The time frame for Low F when adjusting for SES and SES with percent urban is 90–93. ¹¹The time frame for High 2 when adjusting for SES and percent urban is 95–99. *Cluster not significant for this analysis. † Number of cases too small to report for confidentiality reasons.

ISSN: 1476-072X