Table 4.

Number of recalls, recall rates, and difference in recall rates

Study		Digital			Film
Author	Country	No. screening	No. recalls	Recall/1000	No. screening	No. recalls	Recall/1000	Difference in recalls/1000
Campari et al., 2016 (44)	Italy	45 196	1986	43.94	42 240	1388	32.86	11.08
Chiarelli et al., 2013 (43) and Prummel et al., 2016 (12)	Canada	254 758	19 627	77.04	487 334	36 003	73.88	3.16
Del Turco et al., 2007 (16)	Italy	14 385	657	45.67	14 385	570	39.62	6.05
Glynn et al., 2011 (41)	United States	33 879	2685	79.25	32 600	1949	59.79	19.47
Hambly et al., 2009 (40)	Ireland	35 204	1406	39.94	153 619	4792	31.19	8.74
Heddson et al., 2007 (39)	Sweden	9841	102	10.36	25 901	372	14.36	−4
Hofvind et al., 2014 (15)	Norway	446 172	13 130	29.43	1 391 188	47 091	33.85	−4.42
Lewin et al., 2006 (34, 35)	United States	4945	568	114.86	4945	685	138.52	−23.66
Lipasti et al., 2010 (33)	Finland	23 440	401	17.11	27 593	438	15.87	1.23
Perry et al., 2011 (32)	UK	5010	364	72.65	9936	493	49.62	23.04
Pisano et al., 2005 (9, 31)	United States	42 760	3592	84	42 760	3592	84	0
Sala et al., 2015 (13)	Spain	79 031	3316	41.96	82 961	4628	55.79	−13.83
Sankatsing et al., 2018 (30)	The Netherlands	2 620 442	55 021	21	4 722 885	75 503	15.99	5.01
Seradour et al., 2014 (29)	France	23 423	1823	77.83	65 514	4007	61.16	16.67
Skaane et al., 2005 (28) (Oslo I)	Norway	3683	168	45.61	3683	128	34.75	10.86
Skaane et al., 2007 (11) (Oslo II)	Norway	6944	294	42.34	16 985	425	25.02	17.32
Theberge et al., 2016 (27)	Canada	43 802	5876	134.15	782 894	70 128	89.58	44.57
Timmermans et al., 2017 (26)	Belgium	133 627	6068	45.41	143 293	7272	50.75	−5.34
Van Ongeval et al., 2010 (24)	Belgium	11 355	179	15.76	23 325	489	20.96	−5.2
Vernacchia et al., 2009 (23)	United States	21 548	1913	88.78	4838	285	58.91	29.87
Vinnicombe et al., 2009 (22)	UK	8478	406	47.89	31 720	1405	44.29	3.59