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Table 5 Relationship between RFI, PFI and their interaction (RFI x PFI) with the severity of unintentional injurya in 424 children 6 to 14 years old, Hei Longjiang, China, 2017–2018

From: Cumulative effect of risk and protective factors on unintentional injury for Chinese rural children: a nested case-control study

  Step 1 Step 2 Step 3
β p β p β p
Constant   0.013   < 0.01   < 0.01
RFI 0.278 < 0.01 0.269 < 0.01 0.256 < 0.01
PFI    −0.053 0.009 −0.071 0.001
PFI RFI      −0.074 < 0.01
F 178.277 < 0.01 92.826 < 0.01 66.448 < 0.01
R2 0.072   0.075   0.080  
Adjusted R2 0.316   0.318   0.322  
  1. aAccording to linear regression analysis. RFI Risk Factors Index, PFI Protective Factor Index, PFI RFI the interaction of RFI and PFI