Skip to main content

Table 3 Standardized difference of residences for premenopausal and postmenopausal breast cancer cases and controls by age groups;

From: Assessing spatio-temporal variability of risk surfaces using residential history data in a case control study of breast cancer

Premenopausal Case
(n = 1328)
Control
(n = 2270)
Standardized differences No. of areasa > 2SD No. of areasa > critical valuesb
Ages 35–44
(n = 1889)
647 1242 -5.12–5.88 34 8
Ages 45–56
(n = 1709)
681 1028 -4.72–3.14 30 0
Postmenopausal Case
(n = 3484)
Control
(n = 5616)
Standardized differences No. of areas > 2SD No. of areas > critical values
Ages 40–64
(n = 4916)
2115 2801 -3.52–3.77 49 0
Ages 65–79
(n = 4184)
1369 2815 -4.50–3.15 40 0
  1. a Areas refer to the rectangular grid overlaid on to the study area, b Critical values of 3.88 for premenopausal and 3.71 for postmenopausal residences.