Journal of Oncology / 2011 / Article / Tab 1

Research Article

A Cohort Study of p53 Mutations and Protein Accumulation in Benign Breast Tissue and Subsequent Breast Cancer Risk

Table 1

Number of cases and controls by center and exclusions.

LondonPortlandTotal

Number of unique individuals4526131065
 (i) Number of controls used an additional 1×07
  (ii) Number of controls used an additional 2×03
  (iii) Number of controls that reappear as cases86

Total number of records4606321092
  (i) Number of case records230316546
  (ii) Number of control records230316546

Exclusions (breast cancer before baseline, no breast tissue, missing pathology data)1282130
  (i) Cases records excluded53255
  (ii) Control records excluded75075

Total number of records after exclusions (used in unmatched analysis)332630962
  (i) Cases after exclusions177314491
  (ii) Controls after exclusions155316471
Total number of women after exclusions326611937
Total number of case-control sets (used in matched analysis)14813161464

Matched pairs only.

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