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Table 1 Design aspects and odds ratios (ORs) (crudes and corrected for self-selection bias) of six case-control studies.

From: Breast cancer screening: are we seeing the benefit?

Paper

Country

Time period of breast cancer deaths

Cases (n)

Screening exposure

Crude Ors (95% CI)

ORs adjusted for self-selection bias

Allgood et al. [15]

UK

1995-2004

284

Ever/Never attendance before (pseudo) diagnosis

0.35 (0.24-0.51)

0.52 (0.32-0.84)

Fielder et al. [16]

Wales

1998-2001

419

Ever/Never attendance before (pseudo) diagnosis

0.62 (0.47-0.82)

0.75 (0.49-1.14)

Gabe et al. [17]

Iceland

1990-2002

226

Ever/Never attendance before (pseudo) diagnosis

0.59 (0.41-0.84)

0.65 (0.39-1.09)

Paap et al. [18]

Netherlands

2004-2005

118

Screened at index invitation

0.30 (0.14-0.63)

0.24 (0.10-0.58)

Puliti et al. [19]

Italy

1988-2002

1750

Ever/Never attendance before (pseudo) diagnosis

0.46 (0.38-0.56)

0.55 (0.36-0.85)

Roder et al. [20]

Australia

2002-2005

491

Ever/Never attendance before (pseudo) diagnosis

0.59 (0.47-0.74)

0.70a

  1. Source: Paap et al., 2010 [11] modified.
  2. aValues of confidence interval not reported in the paper.