eTable 3.

(available online only). Risk estimation based on calibration curves with 7 versus 14 standards

OR	Approach	7-point curve		14-point curve
		OR estimate	% bias	OR estimate	% bias
1.05	no error	1.052	0.15%	1.052	0.15%
	collapsed linear	1.048	−0.21%	1.050	0.01%
	collapsed curved	1.048	−0.17%	1.051	0.11%
	batch-spec linear	1.042	−0.80%	1.044	−0.56%
	batch-spec curved	1.042	−0.74%	1.045	−0.47%
1.15	no error	1.150	0.04%	1.150	0.04%
	collapsed linear	1.131	−1.64%	1.135	−1.31%
	collapsed curved	1.134	−1.41%	1.138	−1.01%
	batch-spec linear	1.115	−3.00%	1.119	−2.67%
	batch-spec curved	1.118	−2.78%	1.123	−2.39%
1.65	no error	1.655	0.32%	1.655	0.32%
	collapsed linear	1.532	−7.16%	1.544	−6.42%
	collapsed curved	1.562	−5.33%	1.578	−4.39%
	batch-spec linear	1.460	−11.49%	1.472	−10.78%
	batch-spec curved	1.483	−10.12%	1.497	−9.28%