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. 2020 Nov 3;64(Suppl 1):35–42. doi: 10.1111/idj.12101

Table 2.

Enamel loss (μm) summary statistics by day and treatment

Summary statistic	Day 5 (n = 35)		Day 15 (n = 35)
Summary statistic	NaF/KNO₃ dentifrice	NaF/SnCl₂ dentifrice	NaF/KNO₃ dentifrice	NaF/SnCl₂ dentifrice
Number of Observations^*	67	69	65	68
Median	1.917	1.186	3.001	1.636
Mean	2.707	1.965	4.390	3.009
Standard deviation	3.256	2.990	3.554	4.925
5th, 95th percentiles	−0.039, 8.102	0.285, 7.301	0.871, 12.628	0.508, 8.907

^*

Number of observations where each subject used each treatment generally twice, and 35 subjects were analysed for both day 10 and day 15.