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Table 3 Distribution of RFI and PFI in cases with unintentional injury and their controls, 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

Factors Case group (n = 424)
Number (%)
Control group (n = 1272)
Number (%)
Statistics
RFI    F = 85.706**
 0 119 (18.1%) 608 (47.8%)  
 1 150 (35.4%) 454 (35.7%)  
 2 87 (20.5%) 175 (13.8%)  
 3 68 (16.0%) 35 (2.8%)  
PFI    F = 1.866
 0 282 (66.5%) 762 (59.9%)  
 1 82 (19.3%) 344 (27.0%)  
 2 60 (14.2%) 166 (13.1%)  
  1. RFI Risk Factors Index, PFI Protective Factor Index; ** p < 0.01