Geocoding accuracy and the recovery of relationships between environmental exposures and health

Table 6 Recovered odds ratios by TIGER geocoding with variable offsets and number of people in a sample. Estimates and power are based on 10,000 simulated samples.

Number of people in sample	TIGER geocoding with the following offsets in feet.	Estimates		Power (%)
		Mean Odds Ratio	95%CI
316	0	1.18	0.50–1.82	19.0
	200	1.18	0.50–1.84	19.6
	400	1.22	0.50–1.91	21.4
	600	1.20	0.50–1.84	21.7
	800	1.23	0.49–1.91	22.4
474	0	1.19	0.69–1.66	24.3
	200	1.19	0.68–1.67	26.3
	400	1.24	0.68–1.74	28.9
	600	1.22	0.69–1.68	28.3
	800	1.24	0.68–1.74	28.8
632	0	1.20	0.78–1.56	30.2
	200	1.20	0.79–1.58	33.1
	400	1.24	0.79–1.66	35.9
	600	1.22	0.80–1.60	35.6
	800	1.25	0.79–1.65	36.2
790	0	1.20	0.86–1.51	35.5
	200	1.20	0.86–1.52	38.7
	400	1.25	0.86–1.60	41.7
	600	1.23	0.87–1.55	41.2
	800	1.25	0.86–1.60	42.7
948	0	1.20	0.90–1.48	40.1
	200	1.21	0.90–1.49	44.0
	400	1.25	0.92–1.56	47.5
	600	1.23	0.92–1.51	46.9
	800	1.25	0.92–1.56	48.1
1106	0	1.21	0.94–1.46	44.9
	200	1.21	0.94–1.46	49.1
	400	1.25	0.96–1.54	53.2
	600	1.23	0.96–1.49	52.9
	800	1.26	0.96–1.54	53.8
1264	0	1.20	0.95–1.43	49.7
	200	1.21	0.96–1.44	53.4
	400	1.25	0.97–1.51	57.3
	600	1.23	0.97–1.47	56.6
	800	1.25	0.98–1.51	58.0
1422	0	1.21	0.98–1.41	53.6
	200	1.21	0.98–1.42	58.3
	400	1.25	1.00–1.49	62.8
	600	1.23	1.00–1.45	62.4
	800	1.26	1.01–1.49	63.4
1581	0	1.21	1.00–1.40	57.5
	200	1.21	1.00–1.41	62.1
	400	1.25	1.02–1.48	66.1
	600	1.24	1.02–1.44	65.9
	800	1.26	1.03–1.48	67.5

ISSN: 1476-072X