Table 1 Inter-method agreement between direct acid-hydrolysis method, modified direct acid-hydrolysis method, and Taves acid diffusion analysis for estimated total and total soluble fluorides using Bland–Altman analysis.

From: Inter-method reliability for determining total and soluble fluorides in child low-fluoride formula dentifrices

Groups

Mean difference (µg/g F)

95% CI—LL

95% CI—UL

p value

Total fluorides

DM-MDM

15.04

9.12

20.96

< 0.001

DM-TAD

1.82

− 5.56

9.19

0.622

MDM-TAD

− 13.22

− 19.59

− 6.86

< 0.001

Total soluble fluorides

DM-MDM

25.92

20.46

31.38

< 0.001

DM-TAD

58.60

48.06

69.15

< 0.001

MDM-TAD

32.68

25.33

40.04

< 0.001

Combined total and total soluble fluorides

DM-MDM

20.48

16.37

24.59

< 0.001

DM-TAD

30.21

21.52

38.90

< 0.001

MDM-TAD

9.73

2.94

16.52

< 0.001

  1. Data was analysed using 1-sample t-test; p < 0.05 is significant. CI confidence interval, LL lower limit, UL upper limit.
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