Table 2. Sensitivity of Mammography

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Table 2. Sensitivity of Mammography^a

All Rounds

Study	Cases of cancer detected by screening	Total cases of cancer	Per cent	Estimated sensitivity of mammography (no. of rounds)^b
HIP (ages 40-64)	73	173	0.42	0.39 (4)
Malmö (ages 45-69)	176	227	0.78	0.61 (2)
45-49
50-59
60-69
70-74
Swedish Two-County Trial (ages 40-74)
40-49	39	82	0.48
50-59	102	137	0.74
60-69	184	220	0.84
70-74	101	112	0.90
Stockholm (ages 40-64)
40-49	24	45	0.53	0.64
50-59	71	95	0.75	0.89
60-64	33	48	0.69
CNBSS-1 (ages 40-49)	162	286	0.57	0.61 (4)
CNBSS-2 (ages 50-59)	243	347	0.70	0.66 (4)

First Round Only

	Sensitivity of screening at 1-year intervals	Sensitivity of screening at 2-year intervals
Malmö (ages 45-69)	.92
45-49	.73
50-59	.71
60-69	.85
70-74	.81
Swedish Two-County Trial (ages 40-74)	.95	.86
40-49	.81
50-59	.96
60-69	.95
70-74	.98
Stockholm (ages 40-64)	.86	.68
40-49		.53
50-59		.75
60-64		.69
CNBSS-1 (ages 40-49)	.77	0.56
CNBSS-2 (ages 50-59)	.88	.56

^aGothenburg is not listed because of insufficient data; the Edinburgh trial is excluded. Empty cells also indicate lack of sufficient data.
All data are taken from reference 36, using the "detection" method, unless otherwise noted.
^bData taken from reference 37.

Note: CMBSS indicates Canadian National Breast Screening Study; HIP, Health Insurance Plan of Greater New York.

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Table 2. Sensitivity of Mammographya

All Rounds

First Round Only

Table 2. Sensitivity of Mammography^a