Salivary nitric oxide, Simplified Oral Hygiene Index, and salivary flow rate in smokers and non-smokers: a cross-sectional study.

F1000Res · 2019 · PMC7111499 · PMID 32269757

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an increasing trendno p-value reported

The concentration of salivary nitric oxide within the smokers’ group, based on the extent of smoking Amongst the 25 smokers, 14 (56%) were light smokers, 8 (36%) were moderate smokers, and 3 (12%) were heavy smokers. Figure 4 shows an increasing trend in NO concentrations in the saliva with increased extent of smoking.

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