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Table 1 Demographic data and clinical characteristics of the participants of the study

From: Clinical and radiographic comparison of the effects of two types of fixed retainers on periodontium - A randomized clinical trial

  Study groups
SW (n = 15) FRC (n = 15)
Mean or % SD Mean or % SD
Gender (%) Male 26.6   40  
Female 73.4   60  
Age (years)   15.7 2.1 16.2 1.9
Treatment Extraction 46.6   40  
Non-extraction 53.4   60  
  1. SW, spiral wire group; FRC, fiber-reinforced composite group.