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Table 2 Determinants of spatial autocorrelation in density

From: The spatial distribution of radiodense breast tissue: a longitudinal study

Number of women Number of observations Correlate of density Categories Change in Moran's I value from baselinea P valueb
165 493 Parity 0 Baseline 0.14
    1 0.04 (0.00, 0.07)  
    2 0.01 (-0.01, 0.04)  
    3+ 0.03 (-0.00, 0.06)  
162c 484 Body mass index (kg/m2) ≤ 21.5 Baseline 0.03
    > 21.5 to ≤ 24.1 -0.02(-0.04, 0.00)  
    > 24.1 to ≤ 27.0 -0.01(-0.03, 0.01)  
    > 27.0 -0.04(-0.07, -0.01)  
138d 413 Age at first birth (years) ≤ 23 Baseline 0.25
    > 23 to ≤ 27 0.01 (-0.02, 0.03)  
    > 27 to ≤ 30 0.01 (-0.01, 0.04)  
    > 30 -0.01(-0.04, 0.01)  
  1. aChange (95% confidence interval) estimated by regressing Moran's I value onto correlates of density while adjusting for overall breast density and clustering at the woman level. bWald's test. cBody mass index missing for three women. dAmong parous women only.