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Table 2 Intergroup and intragroup comparison of lightness values at various time intervals

From: Comparative evaluation of Icon® resin infiltration and Clinpro™ XT varnish on colour and fluorescence changes of white spot lesions: a randomized controlled trial

  L values of Icon® resin infiltration l values of Clinpro™ XT varnish Intergroup comparison Intragroup comparison
Icon® resin infiltration Clinpro™ XT varnish
T0 73.60 ± 7.71 74.62 ± 7.33 p = 0.295 T0 vs T1, p = 0.000** T0 vs T1, p = 0.000**
T1 78.37 ± 5.94 78.93 ± 5.40 p = 0.446 T1 vs T2,p = 0.211 T1 vs T2, p = 0.003**
T2 80.08 ± 6.46 81.68 ± 5.55 p = 0.041* T2 vs T3, p = 0.168 T2 vs T3, p = 0.069
T3 81.88 ± 6.27 83.69 ± 5.29 p = 0.017* T0 vs T3, p = 0.000** T0 vs T3, p = 0.000**
Adjacent sound enamel 81.67 ± 4.69 82.73 ± 4.66 p = 0.117 T3 vs adjacent sound enamel, p = 0.999 T3 vs adjacent sound enamel, p = 0.761
  1. Statistical Tests: intergroup comparison—independent Student’s t test; intragroup comparison—one-way repeated measures ANOVA
  2. L lightness, T0 before intervention, T1 immediate after intervention, T2 3 months, T3 6 months
  3. *p < 0.05, **p < 0.01