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Table 2 Median and interquartile range values for measured clinical indices in both fiber-reinforced and spiral wire group

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

  Baseline 6 months Pvalue
Median Interquartile range Median Interquartile range
Plaque index SW Maxilla 0.33 1 0.66 1 0.16
Mandible 0.33 1 0.91 1 0.077
FRC Maxilla 0.0 1 1.66 1 0.003*
Mandible 0.91 1 2.0 0 0.001*
Gingival index SW Maxilla 0.0 0 0.83 1 0.01*
Mandible 0.16 1 0.41 1 0.56
FRC Maxilla 0.5 1 1.0 1 0.032*
Mandible 0.33 2 1.0 1 0.021*
Calculus index SW Maxilla 0.0 0 0.0 1 1
Mandible 0.0 0 0.0 0 0.042*
FRC Maxilla 0.0 0 0.0 0 0.15
Mandible 0.0 0 0.33 0 0.018*
Bleeding on probing SW Maxilla 0.0 0 0.5 1 0.045*
Mandible 0.0 1 0.33 1 0.16
FRC Maxilla 0.16 0 0.5 1 0.044*
Mandible 0.0 1 0.66 1 0.025*
  1. SW, spiral wire group; FRC, fiber-reinforced composite group.
  2. *, statistically significant.