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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: J Dent. 2016 Jan 22;46:42–46. doi: 10.1016/j.jdent.2016.01.007

Table 2.

Summary statistics for fluoride content based on histological grouping

Depth (μm) Histology N Summary Statistics (μg/cm3)
Max Overall p-values
vs. Moderate
Mean SD Min Median vs. Sound vs. Mild
30 Sound 24 813.3 649.9 117.4 556.4 2507 <0.0001
Mild 50 1146.0 507.1 406.7 1105.9 2446.6 0.0032
Moderate 17 1215.7 481.4 167.5 1357.2 1917.8 0.0307 0.9999
Severe 12 2261.7 1117.7 1055.6 1878.0 3955.8 <0.0001 0.0041 0.0243
60 Sound 24 316.2 264.8 66.6 231.2 1086.1 <0.0001
Mild 50 437.9 210.8 143.2 419.2 1081.1 0.0086
Moderate 17 499.1 180.9 116.3 531.6 823.5 0.0051 0.9064
Severe 12 907.0 586.6 390.6 830.1 2358 <0.0001 0.0018 0.0887
90 Sound 24 207.5 156.5 49.9 155.4 834.8 <0.0001
Mild 50 338.6 170.8 82.6 275.5 839.0 0.0004
Moderate 17 371.6 150.8 97.6 383.2 742.8 0.0008 0.9643
Severe 12 603.5 303.4 220.8 608.6 1262.5 <0.0001 0.0052 0.1235