Table 3 RRs for mortality from rectal cancer predicted from Cox models in this study* and a past analysis†.

Straight exposure (mg/m3‐year)	Penalised spline*			Linear†
	No lag	15‐year lag	20‐year lag	No lag
0.5	1.0	1.0	1.0	1.0
1	1.0	1.0	1.1‡	1.0
3	1.1‡	1.1‡	1.2‡	1.0
5	1.1‡	1.2‡	1.2‡	1.0
10	1.3‡	1.5‡	1.6‡	1.0
25	1.7‡	2.5‡	2.6‡	1.1
40	2.1‡	3.2‡	2.9‡	1.2

*Corresponds to results in fig 3.

†Past model is from Eisen et al.⁶

‡Significant result at the 0.05 level.