Table 3.

Probability of positive results and risk of false-negative results by order of reading, screening round, type of mammography, and reader. Multivariate analysis with Poisson model

	False positive			False negative
	RR	p value	95 % CI	RR	p value	95 % CI
First reader	Ref.			Ref.
Second reader	1.01	0.629	0.97–1.06	0.33	0.000	0.19–0.56
Film-screen mammography	Ref.			Ref.
Digital mammography	1.78	0.000	1.69–1.87	1.22	0.403	0.77–1.93
Reader a	Ref.			Ref.
Reader b	1.12	0.030	1.01–1.24	0.53	0.269	0.17–1.63
Reader c	1.20	0.000	1.10–1.32	0.64	0.338	0.26–1.59
Reader d	1.02	0.766	0.92–1.12	1.16	0.713	0.53–2.50
Reader e	1.01	0.917	0.89–1.13	0.98	0.966	0.35–2.72
Reader f	1.12	0.026	1.01–1.24	1.16	0.714	0.52–2.63
Reader g	0.90	0.018	0.83–0.98	0.35	0.024	0.14–0.87
Reader h	1.28	0.000	1.16–1.42	0.48	0.244	0.14–1.66
Reader i	1.07	0.179	0.97–1.19	0.65	0.455	0.22–1.99
Reader j	1.21	0.000	1.11–1.32	0.53	0.151	0.22–1.26