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Table 5 Comparison of median of OPG gene expression levels among the study groups at day 21

From: Effect of low level laser and low intensity pulsed ultrasound therapy on bone remodeling during orthodontic tooth movement in rats

Comparison of groups n Median (IqR) X2-Statistica (df) P valueb
Non- treat. 6 0.782 (0.23)   
Ortho. Control 6 1.923 (0.21)   
LLLT 100 mW 6 2.248 (0.19) 10.783 (4) 0.000
LIPUS 6 2.531 (0.18)   
LLLT 100 mW + LIPUS 6 2.990 (0.22)   
  1. IqR interquartile range
  2. aKruskal-Wallis test was applied
  3. bMann-Whitney test with Bonferroni correction for individual pair was applied, P < 0.001