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Table 1 Validation of acinar count method for lobule typing

From: Postpartum breast involution reveals regression of secretory lobules mediated by tissue-remodeling

Lobule type Criteria for lobule type based on number of acini/lobule [39] Number of cases analyzed/lobule type Total number of lobules analyzed Mean number of lobules analyzed/case (± SD) Observed number of acini/lobule
Type 1 12 63 759 12.6 ± 11 10 ± 4
Type 2 50 53 482 9.1 ± 8.4 35 ± 5
Type 3 80 36 226 6.3 ± 4.8 114 ± 10
Type 4 Secretory morphology 13 150 11.5 ± 9.8 128 ± 27
  1. The average number of acini per lobule per type in the breast tissue samples evaluated (last column) are not different than published acinar numbers previously observed in human breast tissue (second column, reference 39), validating the acinar count method for subsequent analyses.