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Table 5 Intra-rater reliability of QLF parameters within smokers, ex-smokers, and never smokers groups

From: Repeatability of dental plaque quantitation by light induced fluorescence technology in current, former, and never smokers

Intraclass Correlation (ICC)

95% Confidence Interval

F Test With True Value 0

Lower bound

Upper bound

F Value

df1

df2

p value

Smokers

 ΔR30

0.986

0.973

0.993

223

25

47.9

 < 0.0001

 ΔR120

0.993

0.987

0.997

422

25

52

 < 0.0001

 SOH score

0.983

0.967

0.992

178

25

50.7

 < 0.0001

Ex-smokers

 ΔR30

0.974

0.947

0.989

111

19

39.4

 < 0.0001

 ΔR120

0.955

0.909

0.98

62.2

19

38.8

 < 0.0001

 SOH score

0.970

0.939

0.987

96

19

39.7

 < 0.0001

Never smokers

 ΔR30

0.941

0.889

0.971

47.4

24

49

 < 0.0001

 ΔR120

0.932

0.873

0.967

43.2

24

49

 < 0.0001

 SOH score

0.966

0.935

0.984

83.8

24

49.6

 > 0.0001

  1. ICC estimates and their 95% confident intervals were calculated based on a mean-rating (k = 3), absolute-agreement, 2-way mixed-effects model
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BMC Oral Health

ISSN: 1472-6831

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