Evaluation of clinical periodontal conditions in smokers and non-smokers.

J Appl Oral Sci · 2007 · PMC4327501 · PMID 19089190

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an overall trendno p-value reported

Although there were no statistically significant differences between smoking and non-smoking groups, there was an overall trend towards greater GBI means, almost always, for non-smokers ( Figure 4 ).

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