Table 2.

Incidence risk ratio of pediatric cancer by zip code.

Zip Code	Cancer (n)	Population Size	IRR	95% CI
19701	26	9885	1.12	0.76–1.67
19702	30	13732	0.93	0.65–1.35
19703	8	3416	1.00	0.50–2.01
19707	12	4033	1.27	0.72–2.25
19709	28	10628	1.13	0.77–1.65
19711	22	9131	1.03	0.67–1.58
19713	12	6806	0.75	0.43–1.34
19720	35	14748	1.01	0.72–1.43
19730	1	106	4.04	0.57–28.7
19734	6	3275	0.78	0.35–1.75
19801	12	4066	1.26	0.71–2.23
19802	14	6290	0.95	0.56–1.62
19803	9	4482	0.86	0.44–1.66
19804	15	3827	1.68	1.00–2.80
19805	23	10989	0.89	0.59–1.36
19807	3	1614	0.79	0.26–2.47
19808	25	7994	1.34	0.89–1.99
19809	7	2943	1.02	0.48–2.15
19810	8	5117	0.67	0.33–1.34
19901	21	8618	1.04	0.67–1.61
19904	20	8061	1.06	0.68–1.66
19933	5	2201	0.97	0.40–2.34
19934	8	3084	1.21	0.55–2.23
19938	7	2271	1.32	0.62–2.78
19939	3	1075	1.19	0.38–3.71
19940	1	1395	0.31	0.04–2.18
19943	6	2671	0.96	0.43–2.14
19945	3	1376	0.93	0.30–2.90
19946	1	1132	0.38	0.05–2.69
19947	8	4440	0.77	0.38–1.55
19950	7	1603	1.87	0.89–3.94
19951	2	334	2.56	0.64–10.3
19952	7	2557	1.17	0.55–2.47
19953	2	1097	0.78	0.19–3.13
19955	1	13	32.9	4.63–234
19956	10	3992	1.07	0.57–2.00
19958	8	2866	1.19	0.59–2.40
19960	9	1714	2.25	1.16–4.34
19962	5	2923	0.73	0.30–1.77
19963	11	4477	1.05	0.58–1.91
19964	1	325	1.31	0.18–9.36
19966	7	4497	0.67	0.32–1.40
19968	3	2017	0.64	0.20–1.98
19970	4	769	2.22	0.83–5.95
19971	3	1491	0.86	0.28–2.68
19973	8	5942	0.58	0.29–1.16
19975	2	1382	0.62	0.15–2.48
19977	12	5352	0.96	0.54–1.70

Abbreviations and Notes: IRR (the cumulative incidence risk ratio); State of Delaware used as the referent for the Poisson Regression. The precision level was 95% Confidence Interval (CI), with the inclusion of 1 between lower and upper levels implying imprecise finding.