Additional file 3.
Fit. DOC file giving, for each of the blocks considered in Table 4 that include more than two levels, a plot by decline in FEV1%P of the observed RRs (with 95% CIs) and the RRs fitted based on the value of β for that block. The fitted value of β and its SE are shown in the heading for the block.
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Fry et al. BMC Cancer 2012 12:498 doi:10.1186/1471-2407-12-498