Table 3.

Relative risk (RR) estimates for leukaemia using revised distance categories (see text)

Distance, d (metres)	1/d	RR (95% CI)	RR*(95% CI)
0-49	0.040	1.67 (0.40 to 6.97)	1.65 (0.39 to 6.89)
50-69	0.017	1.51 (0.48 to 4.79)	1.53 (0.48 to 4.83)
70-99	0.012	2.02 (0.76 to 5.39)	2.00 (0.75 to 5.32)
100-199	0.007	1.64 (1.00 to 2.71)	1.64 (0.99 to 2.70)
0-199	0.010	1.69 (1.13 to 2.53)	1.68 (1.12 to 2.52)
200-599	0.003	1.23 (1.02 to 1.49)	1.22 (1.01 to 1.47)
≥600 (reference group)	0.000	1.00	1.00

^*Adjusted for socioeconomic status.