Table 2 Mean (Standard deviation) values of mineral loss (vol%µm) and lesion depth (µm) in the two study groups before and after treatment and their differences (with confidence intervals).

From: Comparative efficacy of a hydroxyapatite and a fluoride toothpaste for prevention and remineralization of dental caries in children

TreatmentBefore treatmentAfter treatmentDifference (95% CI)P valuea
 ΔZ [Mean (SD)]  
Karex (10%HAP)2357.5 (454.63) 1013.5 (273.59)1344 (1119.93–1568.06)<0.0001
Elmex (500 ppm)2378.5 (593.16) 1009 (392.48)1369.5 (1117.40–1621.59)<0.0001
 LD [Mean (SD)]  
Karex (10%HAP)92.89 (17.15)67.07 (11.79)25.82 (19.79–31.84)<0.0001
Elmex (500 ppm)91.91 (17.94)65.46 (13.64)26.44 (21.15–31.74)<0.0001
  1. aPaired t-test (n = 30, α = 0.05)