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Table 2 Canine root resorption scores (chi-squared test)

From: Effect of micro-osteoperforation on the rate of canine retraction: a split-mouth randomized controlled trial

  Canine root resorption score Pre-retraction canine root resorption Post- retraction canine root resorption Chi-squared P value
Frequency Percent Frequency Percent
Root resorption scores within the control side Zero 28 82.4% 25 73.5% 1.17 0.76025 P > 0.05 NS
One 2 5.9% 2 5.9%
Two 3 8.8% 6 17.6%
Three 1 2.9% 1 2.9%
Root resorption scores within the MOP side Zero 30 88.2% 23 67.6% 5.12 0.16290 P > 0.05 NS
One 2 5.9% 3 8.8%
Two 2 5.9% 6 17.6%
Three 0 0.0% 2 5.9%
Root resorption score difference between the MOP and control groups Canine root resorption score difference (post-pre) MOP group Control group Chi-squared P value
Zero 24 70.6% 30 88.2% 3.24 0.198 P > 0.05 NS
One 5 14.7% 2 5.9%
Two 5 14.7% 2 5.9%
  1. NS non-significant