Table 2.

Odds ratios of leukemia by calculated fields and proximity to power lines, stratified by mobility of cases.

		Total AOR (95% CI)	Cases Who Did Not Move AOR (95% CI)	Cases Who Moved AOR (95% CI)	Cases Who Moved < 2 km AOR (95% CI)	Cases Who Moved ≥ 2 km AOR (95% CI)
Calculated fields	< 0.1	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)
	0.1–0.4	0.90 (0.57–1.41)	0.58 (0.29–1.18)	1.09 (0.66–1.78)	1.24 (0.55–2.80)	1.03 (0.54–2.00)
	> =0.4	1.49 (0.69–3.19)	1.71 (0.65–4.52)	1.50 (0.63–3.58)	N < 5	1.64 (0.63–4.26)
Distance to 200 + kV Power Line	600 +	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)
	500- < 600	1.18 (0.82–1.71)	1.34 (0.83–2.16)	1.08 (0.70–1.65)	0.94 (0.42–2.10)	1.12 (0.71–1.76)
	400- < 500	0.87 (0.60–1.28)	0.74 (0.43–1.29)	0.95 (0.62–1.46)	0.78 (0.35–1.74)	1.01 (0.64–1.60)
	300- < 400	1.11 (0.78–1.59)	1.17 (0.73–1.87)	1.07 (0.71–1.61)	1.28 (0.66–2.47)	1.03 (0.66–1.61)
	200- < 300	0.85 (0.59–1.22)	0.96 (0.59–1.55)	0.78 (0.51–1.21)	N < 5	0.89 (0.56–1.39)
	100- < 200	0.77 (0.53–1.11)	0.72 (0.42–1.23)	0.79 (0.52–1.21)	1.17 (0.61–2.25)	0.68 (0.41–1.11)
	50- < 100	0.96 (0.56–1.64)	0.42 (0.16–1.10)	1.31 (0.74–2.33)	N < 5	1.42 (0.78–2.61)
	< 50	1.38 (0.71–2.67)	1.62 (0.72–3.65)	1.28 (0.60–2.75)	N < 5	1.54 (0.70–3.36)

All controls were used in each stratum to increase stability of estimates and avoid small cell counts. Analyses were adjusted for age, sex, race/ethnicity, and composite SES.